/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-examples/standard_copy6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:15:33,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:15:33,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:15:33,488 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:15:33,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:15:33,505 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:15:33,506 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:15:33,507 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:15:33,507 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:15:33,508 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:15:33,511 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:15:33,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:15:33,515 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:15:33,516 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:15:33,517 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:15:33,518 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:15:33,522 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:15:33,528 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:15:33,529 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:15:33,529 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:15:33,530 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 17:15:33,539 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:15:33,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:15:33,540 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:15:33,540 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:15:33,540 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:15:33,540 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:15:33,540 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:15:33,540 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:15:33,541 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:15:33,541 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:15:33,541 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:15:33,541 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:15:33,541 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:15:33,542 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:15:33,542 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:15:33,542 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:15:33,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:15:33,735 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:15:33,750 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:15:33,752 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:15:33,752 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:15:33,753 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:15:33,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2022-01-31 17:15:33,847 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e15f617b/7c8260293d904a71a87ad3e4a78e97b3/FLAG68a891d66 [2022-01-31 17:15:34,212 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:15:34,219 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy6_ground-1.i [2022-01-31 17:15:34,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e15f617b/7c8260293d904a71a87ad3e4a78e97b3/FLAG68a891d66 [2022-01-31 17:15:34,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4e15f617b/7c8260293d904a71a87ad3e4a78e97b3 [2022-01-31 17:15:34,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:15:34,259 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:15:34,262 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:15:34,262 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:15:34,264 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:15:34,265 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@676efc0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34, skipping insertion in model container [2022-01-31 17:15:34,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:15:34,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:15:34,406 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-examples/standard_copy6_ground-1.i[816,829] [2022-01-31 17:15:34,427 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:15:34,432 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:15:34,439 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-examples/standard_copy6_ground-1.i[816,829] [2022-01-31 17:15:34,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:15:34,455 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:15:34,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34 WrapperNode [2022-01-31 17:15:34,455 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:15:34,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:15:34,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:15:34,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:15:34,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,480 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,487 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:15:34,488 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:15:34,488 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:15:34,488 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:15:34,488 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (1/1) ... [2022-01-31 17:15:34,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:15:34,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:15:34,516 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 17:15:34,532 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 17:15:34,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:15:34,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:15:34,548 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:15:34,548 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:15:34,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:15:34,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:15:34,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:15:34,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:15:34,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:15:34,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:15:34,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:15:34,550 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:15:34,600 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:15:34,601 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:15:34,777 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:15:34,784 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:15:34,785 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2022-01-31 17:15:34,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:34 BoogieIcfgContainer [2022-01-31 17:15:34,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:15:34,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:15:34,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:15:34,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:15:34,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:15:34" (1/3) ... [2022-01-31 17:15:34,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb0f5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:34, skipping insertion in model container [2022-01-31 17:15:34,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:15:34" (2/3) ... [2022-01-31 17:15:34,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bb0f5c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:15:34, skipping insertion in model container [2022-01-31 17:15:34,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:15:34" (3/3) ... [2022-01-31 17:15:34,808 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy6_ground-1.i [2022-01-31 17:15:34,811 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:15:34,811 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:15:34,860 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:15:34,865 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 17:15:34,866 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:15:34,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 35 states have internal predecessors, (52), 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 17:15:34,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:15:34,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:34,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:34,892 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:34,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:34,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1794668349, now seen corresponding path program 1 times [2022-01-31 17:15:34,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:34,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738682325] [2022-01-31 17:15:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:34,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:34,952 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:35,137 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:35,137 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738682325] [2022-01-31 17:15:35,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1738682325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:35,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:35,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:15:35,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860220435] [2022-01-31 17:15:35,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:35,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:15:35,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:35,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:15:35,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:15:35,173 INFO L87 Difference]: Start difference. First operand has 42 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 35 states have internal predecessors, (52), 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 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,224 INFO L93 Difference]: Finished difference Result 76 states and 107 transitions. [2022-01-31 17:15:35,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:15:35,226 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 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 17:15:35,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,231 INFO L225 Difference]: With dead ends: 76 [2022-01-31 17:15:35,232 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 17:15:35,234 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 17:15:35,237 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 40 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 51 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:15:35,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 17:15:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-01-31 17:15:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 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 17:15:35,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-01-31 17:15:35,273 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2022-01-31 17:15:35,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,273 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-01-31 17:15:35,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,274 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-01-31 17:15:35,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 17:15:35,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,275 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:15:35,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,278 INFO L85 PathProgramCache]: Analyzing trace with hash -552728009, now seen corresponding path program 1 times [2022-01-31 17:15:35,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960289974] [2022-01-31 17:15:35,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,284 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:35,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:35,359 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:35,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960289974] [2022-01-31 17:15:35,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [960289974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:35,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:35,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:15:35,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136766633] [2022-01-31 17:15:35,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:35,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:15:35,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:35,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:15:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:15:35,363 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,462 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2022-01-31 17:15:35,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:15:35,463 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 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 17:15:35,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,464 INFO L225 Difference]: With dead ends: 68 [2022-01-31 17:15:35,464 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 17:15:35,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:15:35,465 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 39 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 48 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 17:15:35,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-01-31 17:15:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:15:35,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-01-31 17:15:35,472 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 25 [2022-01-31 17:15:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,472 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-01-31 17:15:35,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,473 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-01-31 17:15:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:15:35,473 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,473 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:15:35,474 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,474 INFO L85 PathProgramCache]: Analyzing trace with hash -2130707627, now seen corresponding path program 1 times [2022-01-31 17:15:35,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988292917] [2022-01-31 17:15:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,488 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:35,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:35,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:35,582 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:35,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988292917] [2022-01-31 17:15:35,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [988292917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:35,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:35,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:15:35,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170076116] [2022-01-31 17:15:35,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:35,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:15:35,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:35,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:15:35,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:15:35,584 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,681 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-01-31 17:15:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:15:35,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 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 27 [2022-01-31 17:15:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,682 INFO L225 Difference]: With dead ends: 70 [2022-01-31 17:15:35,682 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 17:15:35,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:15:35,683 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 53 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 17:15:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-01-31 17:15:35,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 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 17:15:35,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-01-31 17:15:35,689 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 27 [2022-01-31 17:15:35,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,689 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-01-31 17:15:35,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,689 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-01-31 17:15:35,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 17:15:35,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:15:35,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1849302259, now seen corresponding path program 2 times [2022-01-31 17:15:35,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526504094] [2022-01-31 17:15:35,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:35,693 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:35,693 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:35,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:35,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:35,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526504094] [2022-01-31 17:15:35,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [526504094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:35,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:35,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:15:35,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748810915] [2022-01-31 17:15:35,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:35,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:15:35,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:15:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:15:35,733 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,803 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-01-31 17:15:35,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:15:35,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 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 29 [2022-01-31 17:15:35,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,804 INFO L225 Difference]: With dead ends: 78 [2022-01-31 17:15:35,804 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 17:15:35,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:15:35,805 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 49 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 38 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:35,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 17:15:35,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2022-01-31 17:15:35,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 40 states have (on average 1.2) internal successors, (48), 40 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 17:15:35,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-01-31 17:15:35,810 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 29 [2022-01-31 17:15:35,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,810 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-01-31 17:15:35,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,811 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-01-31 17:15:35,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 17:15:35,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,811 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:15:35,812 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1471265767, now seen corresponding path program 1 times [2022-01-31 17:15:35,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012081784] [2022-01-31 17:15:35,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:35,815 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:35,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,816 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:35,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:35,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:35,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012081784] [2022-01-31 17:15:35,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012081784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:35,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:35,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:15:35,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286341247] [2022-01-31 17:15:35,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:35,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:15:35,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:35,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:15:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:15:35,863 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:35,944 INFO L93 Difference]: Finished difference Result 95 states and 113 transitions. [2022-01-31 17:15:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:15:35,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 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 41 [2022-01-31 17:15:35,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:35,945 INFO L225 Difference]: With dead ends: 95 [2022-01-31 17:15:35,945 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:15:35,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:15:35,946 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 66 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:35,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 38 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:35,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:15:35,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2022-01-31 17:15:35,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 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 17:15:35,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-01-31 17:15:35,952 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 41 [2022-01-31 17:15:35,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:35,952 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-01-31 17:15:35,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:35,953 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-01-31 17:15:35,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 17:15:35,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:35,953 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:35,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:15:35,953 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:35,954 INFO L85 PathProgramCache]: Analyzing trace with hash -2045813541, now seen corresponding path program 2 times [2022-01-31 17:15:35,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:35,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359429056] [2022-01-31 17:15:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:35,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:35,956 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:35,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:35,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:35,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:36,034 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:36,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359429056] [2022-01-31 17:15:36,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1359429056] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:36,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:36,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:15:36,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735464902] [2022-01-31 17:15:36,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:36,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:15:36,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:36,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:15:36,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:15:36,037 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:36,134 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-01-31 17:15:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:15:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (3), 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 53 [2022-01-31 17:15:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:36,136 INFO L225 Difference]: With dead ends: 108 [2022-01-31 17:15:36,136 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 17:15:36,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:15:36,141 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:36,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:36,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 17:15:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 17:15:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 54 states have internal predecessors, (62), 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 17:15:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-01-31 17:15:36,154 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 53 [2022-01-31 17:15:36,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:36,154 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-01-31 17:15:36,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,154 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-01-31 17:15:36,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 17:15:36,155 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:36,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:36,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:15:36,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:36,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:36,155 INFO L85 PathProgramCache]: Analyzing trace with hash -772107015, now seen corresponding path program 3 times [2022-01-31 17:15:36,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:36,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897048772] [2022-01-31 17:15:36,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:36,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:36,157 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:36,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:36,159 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:36,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:36,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897048772] [2022-01-31 17:15:36,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [897048772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:36,277 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:36,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:15:36,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841884144] [2022-01-31 17:15:36,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:36,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:15:36,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:36,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:15:36,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:15:36,278 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:36,374 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2022-01-31 17:15:36,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:15:36,374 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 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 17:15:36,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:36,376 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:15:36,376 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 17:15:36,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:15:36,379 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 45 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:36,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 58 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:36,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 17:15:36,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-01-31 17:15:36,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 56 states have internal predecessors, (64), 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 17:15:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2022-01-31 17:15:36,389 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 55 [2022-01-31 17:15:36,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:36,389 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2022-01-31 17:15:36,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 6 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2022-01-31 17:15:36,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 17:15:36,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:36,392 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:36,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:15:36,392 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:36,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:36,393 INFO L85 PathProgramCache]: Analyzing trace with hash -805814889, now seen corresponding path program 4 times [2022-01-31 17:15:36,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:36,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780406032] [2022-01-31 17:15:36,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:36,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:36,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:36,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:36,399 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:36,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:36,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780406032] [2022-01-31 17:15:36,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1780406032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:36,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:36,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:15:36,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789596769] [2022-01-31 17:15:36,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:36,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:15:36,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:15:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:15:36,519 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:36,619 INFO L93 Difference]: Finished difference Result 112 states and 126 transitions. [2022-01-31 17:15:36,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:15:36,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 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 57 [2022-01-31 17:15:36,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:36,620 INFO L225 Difference]: With dead ends: 112 [2022-01-31 17:15:36,620 INFO L226 Difference]: Without dead ends: 65 [2022-01-31 17:15:36,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:15:36,623 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 47 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:36,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 58 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-01-31 17:15:36,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-01-31 17:15:36,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 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 17:15:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 71 transitions. [2022-01-31 17:15:36,636 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 71 transitions. Word has length 57 [2022-01-31 17:15:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:36,636 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 71 transitions. [2022-01-31 17:15:36,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 71 transitions. [2022-01-31 17:15:36,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:15:36,637 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:36,637 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:36,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:15:36,637 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:36,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1160656565, now seen corresponding path program 5 times [2022-01-31 17:15:36,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:36,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003162102] [2022-01-31 17:15:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:36,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:36,640 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:36,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:36,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:36,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:36,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:36,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:36,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003162102] [2022-01-31 17:15:36,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2003162102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:36,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:36,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:15:36,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221673229] [2022-01-31 17:15:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:36,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:15:36,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:36,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:15:36,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:15:36,720 INFO L87 Difference]: Start difference. First operand 64 states and 71 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:36,843 INFO L93 Difference]: Finished difference Result 114 states and 128 transitions. [2022-01-31 17:15:36,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:15:36,844 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 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 59 [2022-01-31 17:15:36,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:36,844 INFO L225 Difference]: With dead ends: 114 [2022-01-31 17:15:36,844 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 17:15:36,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:15:36,845 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 49 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:36,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 63 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:36,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 17:15:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-01-31 17:15:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 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 17:15:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2022-01-31 17:15:36,852 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 59 [2022-01-31 17:15:36,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:36,853 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2022-01-31 17:15:36,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2022-01-31 17:15:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 17:15:36,854 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:36,854 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:36,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:15:36,854 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:36,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1154113619, now seen corresponding path program 6 times [2022-01-31 17:15:36,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:36,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1202027656] [2022-01-31 17:15:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:36,857 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:36,858 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:36,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:36,860 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:36,948 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:36,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1202027656] [2022-01-31 17:15:36,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1202027656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:36,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:36,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:15:36,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876141339] [2022-01-31 17:15:36,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:36,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:15:36,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:36,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:15:36,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:15:36,949 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:37,067 INFO L93 Difference]: Finished difference Result 116 states and 130 transitions. [2022-01-31 17:15:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:15:37,068 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 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 61 [2022-01-31 17:15:37,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:37,069 INFO L225 Difference]: With dead ends: 116 [2022-01-31 17:15:37,069 INFO L226 Difference]: Without dead ends: 69 [2022-01-31 17:15:37,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:15:37,070 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 51 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:37,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 53 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:37,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-01-31 17:15:37,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-01-31 17:15:37,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 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 17:15:37,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 75 transitions. [2022-01-31 17:15:37,074 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 75 transitions. Word has length 61 [2022-01-31 17:15:37,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:37,074 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 75 transitions. [2022-01-31 17:15:37,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 75 transitions. [2022-01-31 17:15:37,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 17:15:37,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:37,075 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:37,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:15:37,075 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:37,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:37,076 INFO L85 PathProgramCache]: Analyzing trace with hash -838690191, now seen corresponding path program 7 times [2022-01-31 17:15:37,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:37,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [341851209] [2022-01-31 17:15:37,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:37,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:37,078 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:37,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:37,079 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:37,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:37,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:37,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [341851209] [2022-01-31 17:15:37,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [341851209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:37,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:37,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:15:37,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300928407] [2022-01-31 17:15:37,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:37,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:15:37,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:37,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:15:37,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:15:37,182 INFO L87 Difference]: Start difference. First operand 68 states and 75 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:37,276 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2022-01-31 17:15:37,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:15:37,277 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 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 63 [2022-01-31 17:15:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:37,277 INFO L225 Difference]: With dead ends: 118 [2022-01-31 17:15:37,277 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 17:15:37,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:15:37,278 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:37,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 53 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:15:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 17:15:37,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-01-31 17:15:37,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 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 17:15:37,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2022-01-31 17:15:37,282 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 63 [2022-01-31 17:15:37,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:37,282 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2022-01-31 17:15:37,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,282 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2022-01-31 17:15:37,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 17:15:37,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:37,283 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:37,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:15:37,283 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:37,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:37,283 INFO L85 PathProgramCache]: Analyzing trace with hash -367737585, now seen corresponding path program 8 times [2022-01-31 17:15:37,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:37,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40758701] [2022-01-31 17:15:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:37,285 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:37,285 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:37,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:37,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:37,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,383 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 17:15:37,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:37,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40758701] [2022-01-31 17:15:37,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [40758701] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:37,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:37,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:15:37,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973329450] [2022-01-31 17:15:37,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:37,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:15:37,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:37,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:15:37,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:15:37,384 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:37,552 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2022-01-31 17:15:37,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:15:37,552 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 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 17:15:37,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:37,552 INFO L225 Difference]: With dead ends: 120 [2022-01-31 17:15:37,552 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 17:15:37,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:15:37,553 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 55 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:37,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 68 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:37,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 17:15:37,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-01-31 17:15:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.121212121212121) internal successors, (74), 66 states have internal predecessors, (74), 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 17:15:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-01-31 17:15:37,558 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 65 [2022-01-31 17:15:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:37,558 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-01-31 17:15:37,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-01-31 17:15:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:15:37,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:37,563 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:37,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:15:37,563 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:37,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:37,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1246150701, now seen corresponding path program 9 times [2022-01-31 17:15:37,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:37,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377725612] [2022-01-31 17:15:37,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:37,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:37,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:37,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:37,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:37,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:37,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:37,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377725612] [2022-01-31 17:15:37,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377725612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:37,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:37,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:15:37,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715782400] [2022-01-31 17:15:37,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:37,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:15:37,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:37,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:15:37,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:15:37,674 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:37,829 INFO L93 Difference]: Finished difference Result 122 states and 136 transitions. [2022-01-31 17:15:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:15:37,829 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (3), 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 67 [2022-01-31 17:15:37,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:37,830 INFO L225 Difference]: With dead ends: 122 [2022-01-31 17:15:37,830 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 17:15:37,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:15:37,831 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:37,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 53 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 17:15:37,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 17:15:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 68 states have internal predecessors, (76), 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 17:15:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-01-31 17:15:37,836 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 67 [2022-01-31 17:15:37,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:37,836 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-01-31 17:15:37,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-01-31 17:15:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 17:15:37,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:37,838 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:15:37,838 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1709599691, now seen corresponding path program 10 times [2022-01-31 17:15:37,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:37,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815675004] [2022-01-31 17:15:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:37,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:37,841 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:37,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:37,842 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:37,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:37,969 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:37,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815675004] [2022-01-31 17:15:37,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [815675004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:37,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:37,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:15:37,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753265228] [2022-01-31 17:15:37,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:37,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:15:37,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:37,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:15:37,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:15:37,970 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:38,138 INFO L93 Difference]: Finished difference Result 124 states and 138 transitions. [2022-01-31 17:15:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:15:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 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 69 [2022-01-31 17:15:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:38,151 INFO L225 Difference]: With dead ends: 124 [2022-01-31 17:15:38,151 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 17:15:38,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:15:38,152 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:38,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 53 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:38,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 17:15:38,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-01-31 17:15:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 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 17:15:38,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 83 transitions. [2022-01-31 17:15:38,157 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 83 transitions. Word has length 69 [2022-01-31 17:15:38,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:38,158 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 83 transitions. [2022-01-31 17:15:38,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:38,158 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 83 transitions. [2022-01-31 17:15:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 17:15:38,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:38,158 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:38,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:15:38,158 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:38,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:38,159 INFO L85 PathProgramCache]: Analyzing trace with hash 407480297, now seen corresponding path program 11 times [2022-01-31 17:15:38,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:38,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687957029] [2022-01-31 17:15:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:38,160 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:38,161 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:38,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:38,178 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:38,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:38,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:38,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687957029] [2022-01-31 17:15:38,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [687957029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:38,294 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:38,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:15:38,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215805712] [2022-01-31 17:15:38,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:38,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:15:38,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:38,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:15:38,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:15:38,295 INFO L87 Difference]: Start difference. First operand 76 states and 83 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:38,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:38,481 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2022-01-31 17:15:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:15:38,481 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 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 71 [2022-01-31 17:15:38,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:38,482 INFO L225 Difference]: With dead ends: 126 [2022-01-31 17:15:38,482 INFO L226 Difference]: Without dead ends: 79 [2022-01-31 17:15:38,482 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:15:38,482 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:38,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 58 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:38,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-01-31 17:15:38,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-01-31 17:15:38,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 72 states have internal predecessors, (80), 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 17:15:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 85 transitions. [2022-01-31 17:15:38,487 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 85 transitions. Word has length 71 [2022-01-31 17:15:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:38,487 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 85 transitions. [2022-01-31 17:15:38,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 85 transitions. [2022-01-31 17:15:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 17:15:38,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:38,488 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:38,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:15:38,488 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:38,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:38,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1093774201, now seen corresponding path program 12 times [2022-01-31 17:15:38,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:38,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928833196] [2022-01-31 17:15:38,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:38,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:38,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:38,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:38,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:38,616 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:38,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928833196] [2022-01-31 17:15:38,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [928833196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:38,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:38,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:15:38,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505653603] [2022-01-31 17:15:38,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:38,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:15:38,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:15:38,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:15:38,617 INFO L87 Difference]: Start difference. First operand 78 states and 85 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:38,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:38,823 INFO L93 Difference]: Finished difference Result 128 states and 142 transitions. [2022-01-31 17:15:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:15:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 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 73 [2022-01-31 17:15:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:38,824 INFO L225 Difference]: With dead ends: 128 [2022-01-31 17:15:38,824 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 17:15:38,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:15:38,825 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 63 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:38,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 58 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:38,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 17:15:38,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-01-31 17:15:38,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 74 states have internal predecessors, (82), 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 17:15:38,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2022-01-31 17:15:38,830 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 73 [2022-01-31 17:15:38,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:38,830 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2022-01-31 17:15:38,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:38,831 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2022-01-31 17:15:38,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:15:38,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:38,831 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:38,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:15:38,831 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:38,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:38,832 INFO L85 PathProgramCache]: Analyzing trace with hash -690335323, now seen corresponding path program 13 times [2022-01-31 17:15:38,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:38,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [105327664] [2022-01-31 17:15:38,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:38,833 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:38,833 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:38,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:38,835 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:38,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:38,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:38,972 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [105327664] [2022-01-31 17:15:38,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [105327664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:38,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:38,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:15:38,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910643558] [2022-01-31 17:15:38,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:38,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:15:38,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:38,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:15:38,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:15:38,973 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:39,193 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2022-01-31 17:15:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:15:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 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 17:15:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:39,194 INFO L225 Difference]: With dead ends: 130 [2022-01-31 17:15:39,194 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 17:15:39,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:15:39,195 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 65 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:39,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 53 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 17:15:39,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-01-31 17:15:39,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 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 17:15:39,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 89 transitions. [2022-01-31 17:15:39,200 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 89 transitions. Word has length 75 [2022-01-31 17:15:39,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:39,200 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 89 transitions. [2022-01-31 17:15:39,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 89 transitions. [2022-01-31 17:15:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 17:15:39,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:39,201 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:39,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:15:39,201 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:39,201 INFO L85 PathProgramCache]: Analyzing trace with hash 467369795, now seen corresponding path program 14 times [2022-01-31 17:15:39,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:39,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603629030] [2022-01-31 17:15:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:39,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:39,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:39,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:39,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:39,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:39,382 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 17:15:39,382 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:39,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603629030] [2022-01-31 17:15:39,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [603629030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:39,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:39,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:15:39,382 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645688136] [2022-01-31 17:15:39,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:39,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:15:39,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:39,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:15:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:15:39,383 INFO L87 Difference]: Start difference. First operand 82 states and 89 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:39,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:39,635 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2022-01-31 17:15:39,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:15:39,636 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 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 77 [2022-01-31 17:15:39,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:39,637 INFO L225 Difference]: With dead ends: 132 [2022-01-31 17:15:39,637 INFO L226 Difference]: Without dead ends: 85 [2022-01-31 17:15:39,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:15:39,638 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:39,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 63 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:39,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-31 17:15:39,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-01-31 17:15:39,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 78 states have internal predecessors, (86), 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 17:15:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2022-01-31 17:15:39,645 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 77 [2022-01-31 17:15:39,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:39,646 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2022-01-31 17:15:39,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 17 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:39,646 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2022-01-31 17:15:39,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 17:15:39,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:39,646 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:39,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:15:39,647 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash 625458529, now seen corresponding path program 15 times [2022-01-31 17:15:39,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:39,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102171928] [2022-01-31 17:15:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:39,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:39,649 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:39,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:39,651 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:39,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:39,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:39,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:39,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:39,814 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:39,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102171928] [2022-01-31 17:15:39,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102171928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:39,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:39,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:15:39,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548964249] [2022-01-31 17:15:39,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:39,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:15:39,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:39,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:15:39,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:15:39,815 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:40,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:40,087 INFO L93 Difference]: Finished difference Result 134 states and 148 transitions. [2022-01-31 17:15:40,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:15:40,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (3), 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 79 [2022-01-31 17:15:40,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:40,088 INFO L225 Difference]: With dead ends: 134 [2022-01-31 17:15:40,088 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 17:15:40,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:15:40,089 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 69 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:40,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 68 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:40,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 17:15:40,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-01-31 17:15:40,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 80 states have (on average 1.1) internal successors, (88), 80 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 17:15:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 17:15:40,095 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 79 [2022-01-31 17:15:40,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:40,095 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 17:15:40,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:40,095 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 17:15:40,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 17:15:40,095 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:40,095 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:40,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:15:40,096 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:40,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:40,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2070090753, now seen corresponding path program 16 times [2022-01-31 17:15:40,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:40,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272958177] [2022-01-31 17:15:40,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:40,098 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:40,098 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:40,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:40,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:40,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:40,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:40,274 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:40,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272958177] [2022-01-31 17:15:40,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1272958177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:40,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:40,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:15:40,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859789715] [2022-01-31 17:15:40,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:40,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:15:40,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:40,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:15:40,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:15:40,276 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:40,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:40,529 INFO L93 Difference]: Finished difference Result 136 states and 150 transitions. [2022-01-31 17:15:40,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:15:40,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 2 states have call successors, (3), 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 81 [2022-01-31 17:15:40,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:40,530 INFO L225 Difference]: With dead ends: 136 [2022-01-31 17:15:40,530 INFO L226 Difference]: Without dead ends: 89 [2022-01-31 17:15:40,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:15:40,531 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 71 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:40,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 53 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-01-31 17:15:40,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-01-31 17:15:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 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 17:15:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 95 transitions. [2022-01-31 17:15:40,536 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 95 transitions. Word has length 81 [2022-01-31 17:15:40,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:40,537 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 95 transitions. [2022-01-31 17:15:40,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 19 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:40,537 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 95 transitions. [2022-01-31 17:15:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:15:40,537 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:40,537 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:40,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:15:40,537 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:40,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1667296029, now seen corresponding path program 17 times [2022-01-31 17:15:40,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:40,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892925096] [2022-01-31 17:15:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:40,539 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:40,539 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:40,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:40,541 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:40,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:40,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:40,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892925096] [2022-01-31 17:15:40,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892925096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:40,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:40,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:15:40,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466537762] [2022-01-31 17:15:40,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:40,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:15:40,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:40,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:15:40,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:15:40,733 INFO L87 Difference]: Start difference. First operand 88 states and 95 transitions. Second operand has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:41,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:41,043 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-01-31 17:15:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:15:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 2 states have call successors, (3), 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 83 [2022-01-31 17:15:41,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:41,044 INFO L225 Difference]: With dead ends: 138 [2022-01-31 17:15:41,044 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 17:15:41,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:15:41,045 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 73 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:41,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 58 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:41,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 17:15:41,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-01-31 17:15:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 states have internal predecessors, (92), 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 17:15:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2022-01-31 17:15:41,051 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 83 [2022-01-31 17:15:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:41,051 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2022-01-31 17:15:41,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.1904761904761907) internal successors, (67), 20 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:41,051 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2022-01-31 17:15:41,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 17:15:41,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:41,052 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:41,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:15:41,052 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1591633221, now seen corresponding path program 18 times [2022-01-31 17:15:41,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:41,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623879621] [2022-01-31 17:15:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:41,054 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:41,054 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:41,054 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:41,056 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:41,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:41,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623879621] [2022-01-31 17:15:41,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [623879621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:41,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:41,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:15:41,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085152519] [2022-01-31 17:15:41,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:41,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:15:41,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:41,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:15:41,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:15:41,259 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:41,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:41,567 INFO L93 Difference]: Finished difference Result 140 states and 154 transitions. [2022-01-31 17:15:41,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:15:41,567 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 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 17:15:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:41,568 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:15:41,568 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 17:15:41,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:15:41,569 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:41,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 63 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:41,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 17:15:41,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-01-31 17:15:41,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 86 states have internal predecessors, (94), 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 17:15:41,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 99 transitions. [2022-01-31 17:15:41,576 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 99 transitions. Word has length 85 [2022-01-31 17:15:41,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:41,576 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 99 transitions. [2022-01-31 17:15:41,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 21 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:41,576 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 99 transitions. [2022-01-31 17:15:41,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 17:15:41,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:41,576 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:41,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:15:41,577 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:41,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1903483609, now seen corresponding path program 19 times [2022-01-31 17:15:41,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:41,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872769808] [2022-01-31 17:15:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:41,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:41,579 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:41,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:41,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:41,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:41,803 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 17:15:41,803 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:41,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872769808] [2022-01-31 17:15:41,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1872769808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:41,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:41,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:15:41,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88886861] [2022-01-31 17:15:41,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:41,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:15:41,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:41,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:15:41,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:15:41,804 INFO L87 Difference]: Start difference. First operand 92 states and 99 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:42,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:42,108 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-01-31 17:15:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:15:42,108 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (3), 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 87 [2022-01-31 17:15:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:42,109 INFO L225 Difference]: With dead ends: 142 [2022-01-31 17:15:42,109 INFO L226 Difference]: Without dead ends: 95 [2022-01-31 17:15:42,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:15:42,110 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 77 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:42,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 53 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:42,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-31 17:15:42,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-01-31 17:15:42,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 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 17:15:42,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 101 transitions. [2022-01-31 17:15:42,119 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 101 transitions. Word has length 87 [2022-01-31 17:15:42,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:42,119 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 101 transitions. [2022-01-31 17:15:42,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 22 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:42,119 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 101 transitions. [2022-01-31 17:15:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 17:15:42,120 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:42,120 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:42,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:15:42,120 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:42,120 INFO L85 PathProgramCache]: Analyzing trace with hash 2046331767, now seen corresponding path program 20 times [2022-01-31 17:15:42,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:42,120 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751945831] [2022-01-31 17:15:42,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:42,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:42,123 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:42,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:42,125 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:42,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:42,406 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:42,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751945831] [2022-01-31 17:15:42,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [751945831] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:42,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:42,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:15:42,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385148236] [2022-01-31 17:15:42,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:42,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:15:42,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:42,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:15:42,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:15:42,407 INFO L87 Difference]: Start difference. First operand 94 states and 101 transitions. Second operand has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:42,764 INFO L93 Difference]: Finished difference Result 144 states and 158 transitions. [2022-01-31 17:15:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:15:42,764 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 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 89 [2022-01-31 17:15:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:42,764 INFO L225 Difference]: With dead ends: 144 [2022-01-31 17:15:42,764 INFO L226 Difference]: Without dead ends: 97 [2022-01-31 17:15:42,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:15:42,766 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 79 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:42,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 68 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-01-31 17:15:42,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-01-31 17:15:42,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 90 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 17:15:42,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-01-31 17:15:42,772 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 89 [2022-01-31 17:15:42,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:42,772 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-01-31 17:15:42,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.0416666666666665) internal successors, (73), 23 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:42,772 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-01-31 17:15:42,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:15:42,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:42,773 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:42,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:15:42,773 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1884458133, now seen corresponding path program 21 times [2022-01-31 17:15:42,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:42,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932120028] [2022-01-31 17:15:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:42,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:42,775 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:42,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:42,777 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:43,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:43,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932120028] [2022-01-31 17:15:43,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1932120028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:43,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:43,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:15:43,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051669333] [2022-01-31 17:15:43,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:43,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:15:43,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:15:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:15:43,037 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:43,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:43,403 INFO L93 Difference]: Finished difference Result 146 states and 160 transitions. [2022-01-31 17:15:43,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:15:43,404 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 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 91 [2022-01-31 17:15:43,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:43,404 INFO L225 Difference]: With dead ends: 146 [2022-01-31 17:15:43,404 INFO L226 Difference]: Without dead ends: 99 [2022-01-31 17:15:43,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:15:43,405 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 81 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:43,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 63 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:43,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-01-31 17:15:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-01-31 17:15:43,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 92 states have internal predecessors, (100), 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 17:15:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 105 transitions. [2022-01-31 17:15:43,413 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 105 transitions. Word has length 91 [2022-01-31 17:15:43,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:43,413 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 105 transitions. [2022-01-31 17:15:43,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.0) internal successors, (75), 24 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:43,413 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 105 transitions. [2022-01-31 17:15:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 17:15:43,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:43,413 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:43,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:15:43,414 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:43,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:43,414 INFO L85 PathProgramCache]: Analyzing trace with hash 942718515, now seen corresponding path program 22 times [2022-01-31 17:15:43,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:43,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794256495] [2022-01-31 17:15:43,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:43,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:43,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:43,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:43,418 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:43,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:43,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:43,688 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:43,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794256495] [2022-01-31 17:15:43,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794256495] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:43,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:43,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:15:43,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813500908] [2022-01-31 17:15:43,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:43,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:15:43,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:43,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:15:43,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:15:43,689 INFO L87 Difference]: Start difference. First operand 98 states and 105 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:44,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:44,110 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2022-01-31 17:15:44,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:15:44,111 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (3), 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 93 [2022-01-31 17:15:44,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:44,111 INFO L225 Difference]: With dead ends: 148 [2022-01-31 17:15:44,111 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 17:15:44,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:15:44,112 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 83 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:44,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 68 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 17:15:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-01-31 17:15:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 94 states have internal predecessors, (102), 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 17:15:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-01-31 17:15:44,123 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 93 [2022-01-31 17:15:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:44,123 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-01-31 17:15:44,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-01-31 17:15:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 17:15:44,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:44,124 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:44,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:15:44,124 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:44,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:44,124 INFO L85 PathProgramCache]: Analyzing trace with hash -2125922223, now seen corresponding path program 23 times [2022-01-31 17:15:44,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:44,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83638619] [2022-01-31 17:15:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:44,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:44,130 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:44,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:44,135 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:44,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:44,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:44,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:44,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83638619] [2022-01-31 17:15:44,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [83638619] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:44,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:44,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:15:44,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756598146] [2022-01-31 17:15:44,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:44,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:15:44,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:44,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:15:44,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:15:44,447 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:44,849 INFO L93 Difference]: Finished difference Result 150 states and 164 transitions. [2022-01-31 17:15:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:15:44,850 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 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 17:15:44,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:44,850 INFO L225 Difference]: With dead ends: 150 [2022-01-31 17:15:44,850 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 17:15:44,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:15:44,852 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:44,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 58 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 17:15:44,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 17:15:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 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 17:15:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2022-01-31 17:15:44,859 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 95 [2022-01-31 17:15:44,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:44,859 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2022-01-31 17:15:44,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:44,859 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2022-01-31 17:15:44,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 17:15:44,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:44,860 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:44,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:15:44,860 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:44,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:44,860 INFO L85 PathProgramCache]: Analyzing trace with hash -447139089, now seen corresponding path program 24 times [2022-01-31 17:15:44,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:44,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1672666863] [2022-01-31 17:15:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:44,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:44,862 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:44,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:44,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:45,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:45,172 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 17:15:45,172 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:45,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1672666863] [2022-01-31 17:15:45,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1672666863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:45,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:45,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:15:45,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766070743] [2022-01-31 17:15:45,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:45,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:15:45,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:45,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:15:45,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:15:45,173 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:45,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:45,624 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2022-01-31 17:15:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:15:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 states have call successors, (3), 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 97 [2022-01-31 17:15:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:45,625 INFO L225 Difference]: With dead ends: 152 [2022-01-31 17:15:45,625 INFO L226 Difference]: Without dead ends: 105 [2022-01-31 17:15:45,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:15:45,626 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:45,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 63 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:45,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-01-31 17:15:45,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-01-31 17:15:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 98 states have internal predecessors, (106), 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 17:15:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 111 transitions. [2022-01-31 17:15:45,642 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 111 transitions. Word has length 97 [2022-01-31 17:15:45,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:45,642 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 111 transitions. [2022-01-31 17:15:45,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:45,642 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 111 transitions. [2022-01-31 17:15:45,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:15:45,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:45,643 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:45,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:15:45,643 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:45,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2044250611, now seen corresponding path program 25 times [2022-01-31 17:15:45,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:45,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884766921] [2022-01-31 17:15:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:45,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:45,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:45,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:45,649 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:45,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:45,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:45,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884766921] [2022-01-31 17:15:45,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [884766921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:45,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:45,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:15:45,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457933400] [2022-01-31 17:15:45,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:45,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:15:45,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:45,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:15:45,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:15:45,968 INFO L87 Difference]: Start difference. First operand 104 states and 111 transitions. Second operand has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:46,415 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2022-01-31 17:15:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:15:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 2 states have call successors, (3), 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 99 [2022-01-31 17:15:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:46,416 INFO L225 Difference]: With dead ends: 154 [2022-01-31 17:15:46,416 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 17:15:46,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:15:46,421 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:46,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 53 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:46,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 17:15:46,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-01-31 17:15:46,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 100 states have (on average 1.08) internal successors, (108), 100 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 17:15:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 113 transitions. [2022-01-31 17:15:46,436 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 113 transitions. Word has length 99 [2022-01-31 17:15:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:46,436 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 113 transitions. [2022-01-31 17:15:46,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8620689655172415) internal successors, (83), 28 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 113 transitions. [2022-01-31 17:15:46,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 17:15:46,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:46,439 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:46,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:15:46,440 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash 729868715, now seen corresponding path program 26 times [2022-01-31 17:15:46,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:46,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983794416] [2022-01-31 17:15:46,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:46,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:46,442 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:46,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:46,445 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:46,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:46,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:46,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:46,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:46,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983794416] [2022-01-31 17:15:46,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983794416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:46,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:46,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:15:46,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495452772] [2022-01-31 17:15:46,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:46,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:15:46,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:46,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:15:46,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:15:46,802 INFO L87 Difference]: Start difference. First operand 106 states and 113 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:47,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:47,274 INFO L93 Difference]: Finished difference Result 156 states and 170 transitions. [2022-01-31 17:15:47,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:15:47,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 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 101 [2022-01-31 17:15:47,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:47,275 INFO L225 Difference]: With dead ends: 156 [2022-01-31 17:15:47,275 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 17:15:47,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:15:47,276 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 91 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:47,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 63 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:47,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 17:15:47,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-01-31 17:15:47,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 102 states have internal predecessors, (110), 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 17:15:47,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 115 transitions. [2022-01-31 17:15:47,307 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 115 transitions. Word has length 101 [2022-01-31 17:15:47,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:47,307 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 115 transitions. [2022-01-31 17:15:47,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:47,308 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 115 transitions. [2022-01-31 17:15:47,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 17:15:47,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:47,308 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:47,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:15:47,308 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:47,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash -516149815, now seen corresponding path program 27 times [2022-01-31 17:15:47,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:47,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554247590] [2022-01-31 17:15:47,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:47,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:47,310 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:47,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:47,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:47,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:47,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:47,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:47,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:47,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554247590] [2022-01-31 17:15:47,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1554247590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:47,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:47,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:15:47,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067638835] [2022-01-31 17:15:47,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:47,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:15:47,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:47,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:15:47,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:15:47,765 INFO L87 Difference]: Start difference. First operand 108 states and 115 transitions. Second operand has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:48,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:48,286 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2022-01-31 17:15:48,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:15:48,287 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 2 states have call successors, (3), 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 103 [2022-01-31 17:15:48,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:48,287 INFO L225 Difference]: With dead ends: 158 [2022-01-31 17:15:48,287 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 17:15:48,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:15:48,289 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 93 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:48,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 73 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:48,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 17:15:48,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-01-31 17:15:48,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 104 states have internal predecessors, (112), 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 17:15:48,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 117 transitions. [2022-01-31 17:15:48,297 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 117 transitions. Word has length 103 [2022-01-31 17:15:48,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:48,297 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 117 transitions. [2022-01-31 17:15:48,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.806451612903226) internal successors, (87), 30 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:48,297 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 117 transitions. [2022-01-31 17:15:48,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 17:15:48,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:48,298 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:48,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:15:48,298 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:48,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:48,298 INFO L85 PathProgramCache]: Analyzing trace with hash 355918439, now seen corresponding path program 28 times [2022-01-31 17:15:48,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:48,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092177907] [2022-01-31 17:15:48,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:48,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:48,300 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:48,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:48,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:48,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:48,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:48,683 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:48,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092177907] [2022-01-31 17:15:48,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1092177907] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:48,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:48,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:15:48,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047542608] [2022-01-31 17:15:48,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:48,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:15:48,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:48,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:15:48,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:15:48,684 INFO L87 Difference]: Start difference. First operand 110 states and 117 transitions. Second operand has 32 states, 32 states have (on average 2.78125) internal successors, (89), 31 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:49,207 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2022-01-31 17:15:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:15:49,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 31 states have internal predecessors, (89), 2 states have call successors, (3), 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 17:15:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:49,208 INFO L225 Difference]: With dead ends: 160 [2022-01-31 17:15:49,208 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 17:15:49,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:15:49,209 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 95 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:49,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 63 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 17:15:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-01-31 17:15:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 106 states have internal predecessors, (114), 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 17:15:49,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 119 transitions. [2022-01-31 17:15:49,218 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 119 transitions. Word has length 105 [2022-01-31 17:15:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:49,218 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 119 transitions. [2022-01-31 17:15:49,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.78125) internal successors, (89), 31 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 119 transitions. [2022-01-31 17:15:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:15:49,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:49,219 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:49,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:15:49,219 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:49,219 INFO L85 PathProgramCache]: Analyzing trace with hash 894887813, now seen corresponding path program 29 times [2022-01-31 17:15:49,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:49,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845106254] [2022-01-31 17:15:49,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:49,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:49,221 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:49,221 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:49,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:49,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:49,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:49,677 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:49,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845106254] [2022-01-31 17:15:49,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845106254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:49,677 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:49,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:15:49,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103827837] [2022-01-31 17:15:49,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:49,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:15:49,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:49,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:15:49,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:15:49,678 INFO L87 Difference]: Start difference. First operand 112 states and 119 transitions. Second operand has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:50,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:50,243 INFO L93 Difference]: Finished difference Result 162 states and 176 transitions. [2022-01-31 17:15:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:15:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 2 states have call successors, (3), 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 107 [2022-01-31 17:15:50,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:50,244 INFO L225 Difference]: With dead ends: 162 [2022-01-31 17:15:50,244 INFO L226 Difference]: Without dead ends: 115 [2022-01-31 17:15:50,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:15:50,246 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 97 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:50,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 73 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-01-31 17:15:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-01-31 17:15:50,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 108 states have internal predecessors, (116), 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 17:15:50,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-01-31 17:15:50,255 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 107 [2022-01-31 17:15:50,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:50,255 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-01-31 17:15:50,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.757575757575758) internal successors, (91), 32 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:50,255 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-01-31 17:15:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 17:15:50,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:50,256 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:50,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:15:50,256 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:50,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:50,256 INFO L85 PathProgramCache]: Analyzing trace with hash -846586589, now seen corresponding path program 30 times [2022-01-31 17:15:50,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:50,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757224608] [2022-01-31 17:15:50,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:50,258 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:50,258 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:50,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:50,261 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:50,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:50,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:50,681 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 17:15:50,681 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:50,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757224608] [2022-01-31 17:15:50,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [757224608] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:50,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:50,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:15:50,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473983622] [2022-01-31 17:15:50,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:50,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:15:50,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:50,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:15:50,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:15:50,683 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:51,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:51,307 INFO L93 Difference]: Finished difference Result 164 states and 178 transitions. [2022-01-31 17:15:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:15:51,307 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 2 states have call successors, (3), 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 109 [2022-01-31 17:15:51,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:51,308 INFO L225 Difference]: With dead ends: 164 [2022-01-31 17:15:51,308 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 17:15:51,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:15:51,311 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:51,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 63 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 17:15:51,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-01-31 17:15:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 110 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 17:15:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2022-01-31 17:15:51,319 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 109 [2022-01-31 17:15:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:51,320 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2022-01-31 17:15:51,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 33 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:51,320 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2022-01-31 17:15:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 17:15:51,320 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:51,320 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:51,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:15:51,320 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:51,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:51,320 INFO L85 PathProgramCache]: Analyzing trace with hash 633758529, now seen corresponding path program 31 times [2022-01-31 17:15:51,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:51,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519902504] [2022-01-31 17:15:51,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:51,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:51,322 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:51,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:51,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:51,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:51,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:51,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:51,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:51,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:51,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519902504] [2022-01-31 17:15:51,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519902504] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:51,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:51,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:15:51,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203716505] [2022-01-31 17:15:51,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:51,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:15:51,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:15:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:15:51,883 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:52,515 INFO L93 Difference]: Finished difference Result 166 states and 180 transitions. [2022-01-31 17:15:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:15:52,515 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (3), 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 111 [2022-01-31 17:15:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:52,515 INFO L225 Difference]: With dead ends: 166 [2022-01-31 17:15:52,515 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 17:15:52,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:15:52,517 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 101 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:52,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 73 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:52,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 17:15:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-01-31 17:15:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 112 states have internal predecessors, (120), 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 17:15:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2022-01-31 17:15:52,527 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 111 [2022-01-31 17:15:52,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:52,527 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2022-01-31 17:15:52,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 34 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:52,527 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2022-01-31 17:15:52,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 17:15:52,528 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:52,528 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:52,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:15:52,528 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1611241951, now seen corresponding path program 32 times [2022-01-31 17:15:52,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:52,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [230203765] [2022-01-31 17:15:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:52,530 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:52,530 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:52,530 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:52,533 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:53,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:53,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:53,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [230203765] [2022-01-31 17:15:53,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [230203765] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:53,012 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:53,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:15:53,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299004802] [2022-01-31 17:15:53,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:53,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:15:53,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:53,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:15:53,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:15:53,013 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 35 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:53,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:53,676 INFO L93 Difference]: Finished difference Result 168 states and 182 transitions. [2022-01-31 17:15:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:15:53,676 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 35 states have internal predecessors, (97), 2 states have call successors, (3), 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 113 [2022-01-31 17:15:53,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:53,677 INFO L225 Difference]: With dead ends: 168 [2022-01-31 17:15:53,677 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 17:15:53,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:15:53,678 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 103 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:53,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 68 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:53,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 17:15:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-01-31 17:15:53,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 114 states have internal predecessors, (122), 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 17:15:53,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2022-01-31 17:15:53,693 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 113 [2022-01-31 17:15:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:53,694 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2022-01-31 17:15:53,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6944444444444446) internal successors, (97), 35 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2022-01-31 17:15:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:15:53,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:53,695 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:53,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:15:53,695 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:53,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:53,695 INFO L85 PathProgramCache]: Analyzing trace with hash 374972669, now seen corresponding path program 33 times [2022-01-31 17:15:53,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:53,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825332705] [2022-01-31 17:15:53,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:53,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:53,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:53,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:53,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:53,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:54,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:54,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:54,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825332705] [2022-01-31 17:15:54,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [825332705] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:54,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:54,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:15:54,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125520813] [2022-01-31 17:15:54,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:54,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:15:54,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:54,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:15:54,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:15:54,101 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:54,583 INFO L93 Difference]: Finished difference Result 170 states and 184 transitions. [2022-01-31 17:15:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:15:54,583 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 2 states have call successors, (3), 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 17:15:54,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:54,585 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:15:54,585 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 17:15:54,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:15:54,586 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:54,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 63 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:54,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 17:15:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-01-31 17:15:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 116 states have internal predecessors, (124), 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 17:15:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 129 transitions. [2022-01-31 17:15:54,596 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 129 transitions. Word has length 115 [2022-01-31 17:15:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:54,597 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 129 transitions. [2022-01-31 17:15:54,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.675675675675676) internal successors, (99), 36 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:54,597 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 129 transitions. [2022-01-31 17:15:54,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 17:15:54,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:54,597 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:54,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:15:54,597 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:54,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:54,597 INFO L85 PathProgramCache]: Analyzing trace with hash 2026133659, now seen corresponding path program 34 times [2022-01-31 17:15:54,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:54,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781669182] [2022-01-31 17:15:54,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:54,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:54,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:54,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:54,604 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:54,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:54,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:54,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:55,004 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:55,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781669182] [2022-01-31 17:15:55,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [781669182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:55,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:55,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:15:55,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014242571] [2022-01-31 17:15:55,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:55,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:15:55,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:15:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:15:55,006 INFO L87 Difference]: Start difference. First operand 122 states and 129 transitions. Second operand has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:55,720 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2022-01-31 17:15:55,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:15:55,720 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 2 states have call successors, (3), 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 117 [2022-01-31 17:15:55,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:55,721 INFO L225 Difference]: With dead ends: 172 [2022-01-31 17:15:55,721 INFO L226 Difference]: Without dead ends: 125 [2022-01-31 17:15:55,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:15:55,722 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 107 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:55,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 58 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:55,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-31 17:15:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-01-31 17:15:55,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 118 states have internal predecessors, (126), 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 17:15:55,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 131 transitions. [2022-01-31 17:15:55,734 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 131 transitions. Word has length 117 [2022-01-31 17:15:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:55,734 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 131 transitions. [2022-01-31 17:15:55,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 37 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 131 transitions. [2022-01-31 17:15:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 17:15:55,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:55,735 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:55,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:15:55,735 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:55,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:55,735 INFO L85 PathProgramCache]: Analyzing trace with hash -346054471, now seen corresponding path program 35 times [2022-01-31 17:15:55,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:55,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [510030799] [2022-01-31 17:15:55,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:55,737 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:55,737 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:55,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:55,741 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:56,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:56,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:56,285 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:56,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [510030799] [2022-01-31 17:15:56,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [510030799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:56,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:56,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:15:56,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847500398] [2022-01-31 17:15:56,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:56,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:15:56,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:56,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:15:56,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:15:56,286 INFO L87 Difference]: Start difference. First operand 124 states and 131 transitions. Second operand has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 38 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:57,015 INFO L93 Difference]: Finished difference Result 174 states and 188 transitions. [2022-01-31 17:15:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:15:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 38 states have internal predecessors, (103), 2 states have call successors, (3), 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 119 [2022-01-31 17:15:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:57,016 INFO L225 Difference]: With dead ends: 174 [2022-01-31 17:15:57,016 INFO L226 Difference]: Without dead ends: 127 [2022-01-31 17:15:57,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:15:57,017 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 109 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:57,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 68 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-01-31 17:15:57,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-01-31 17:15:57,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 120 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 17:15:57,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 133 transitions. [2022-01-31 17:15:57,028 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 133 transitions. Word has length 119 [2022-01-31 17:15:57,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:57,029 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 133 transitions. [2022-01-31 17:15:57,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.641025641025641) internal successors, (103), 38 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:57,029 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 133 transitions. [2022-01-31 17:15:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 17:15:57,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:57,029 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:57,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:15:57,030 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:57,030 INFO L85 PathProgramCache]: Analyzing trace with hash 608786775, now seen corresponding path program 36 times [2022-01-31 17:15:57,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:57,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081690299] [2022-01-31 17:15:57,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:57,032 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:57,032 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:57,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:57,036 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:57,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:57,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:57,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:57,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081690299] [2022-01-31 17:15:57,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081690299] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:57,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:57,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:15:57,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402432229] [2022-01-31 17:15:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:57,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:15:57,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:57,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:15:57,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:15:57,648 INFO L87 Difference]: Start difference. First operand 126 states and 133 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:58,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:58,420 INFO L93 Difference]: Finished difference Result 176 states and 190 transitions. [2022-01-31 17:15:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:15:58,421 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 2 states have call successors, (3), 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 121 [2022-01-31 17:15:58,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:58,421 INFO L225 Difference]: With dead ends: 176 [2022-01-31 17:15:58,422 INFO L226 Difference]: Without dead ends: 129 [2022-01-31 17:15:58,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:15:58,423 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 111 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:58,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 73 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:15:58,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-01-31 17:15:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-01-31 17:15:58,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 122 states have internal predecessors, (130), 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 17:15:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-01-31 17:15:58,440 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 121 [2022-01-31 17:15:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:58,441 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-01-31 17:15:58,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 39 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-01-31 17:15:58,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:15:58,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:58,442 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:58,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:15:58,442 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash -911777163, now seen corresponding path program 37 times [2022-01-31 17:15:58,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:58,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590681122] [2022-01-31 17:15:58,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:58,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:58,445 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:58,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:58,450 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:58,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:59,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:15:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:15:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:15:59,048 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:15:59,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590681122] [2022-01-31 17:15:59,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1590681122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:15:59,048 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:15:59,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:15:59,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288523252] [2022-01-31 17:15:59,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:15:59,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:15:59,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:15:59,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:15:59,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:15:59,049 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 41 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 40 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:59,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:15:59,831 INFO L93 Difference]: Finished difference Result 178 states and 192 transitions. [2022-01-31 17:15:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:15:59,832 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 40 states have internal predecessors, (107), 2 states have call successors, (3), 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 123 [2022-01-31 17:15:59,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:15:59,832 INFO L225 Difference]: With dead ends: 178 [2022-01-31 17:15:59,832 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 17:15:59,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:15:59,834 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 113 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:15:59,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 63 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:15:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 17:15:59,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 17:15:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 124 states have (on average 1.064516129032258) internal successors, (132), 124 states have internal predecessors, (132), 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 17:15:59,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2022-01-31 17:15:59,873 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 123 [2022-01-31 17:15:59,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:15:59,873 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2022-01-31 17:15:59,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.6097560975609757) internal successors, (107), 40 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:15:59,874 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2022-01-31 17:15:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 17:15:59,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:15:59,874 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:15:59,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:15:59,874 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:15:59,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:15:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1884840941, now seen corresponding path program 38 times [2022-01-31 17:15:59,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:15:59,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892145282] [2022-01-31 17:15:59,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:15:59,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:15:59,876 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:15:59,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:15:59,881 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:15:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:00,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:00,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:00,495 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:00,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892145282] [2022-01-31 17:16:00,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892145282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:00,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:00,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:16:00,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237134156] [2022-01-31 17:16:00,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:00,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:16:00,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:00,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:16:00,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:16:00,497 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 41 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:01,321 INFO L93 Difference]: Finished difference Result 180 states and 194 transitions. [2022-01-31 17:16:01,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:16:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 41 states have internal predecessors, (109), 2 states have call successors, (3), 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 17:16:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:01,322 INFO L225 Difference]: With dead ends: 180 [2022-01-31 17:16:01,322 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 17:16:01,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:16:01,324 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 115 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:01,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 68 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 17:16:01,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-01-31 17:16:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 126 states have internal predecessors, (134), 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 17:16:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 139 transitions. [2022-01-31 17:16:01,337 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 139 transitions. Word has length 125 [2022-01-31 17:16:01,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:01,338 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 139 transitions. [2022-01-31 17:16:01,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.5952380952380953) internal successors, (109), 41 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:01,338 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 139 transitions. [2022-01-31 17:16:01,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 17:16:01,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:01,338 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:01,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:16:01,338 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:01,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:01,339 INFO L85 PathProgramCache]: Analyzing trace with hash -696261071, now seen corresponding path program 39 times [2022-01-31 17:16:01,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:01,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814463436] [2022-01-31 17:16:01,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:01,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:01,341 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:01,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:01,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:02,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:02,023 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 17:16:02,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:02,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814463436] [2022-01-31 17:16:02,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814463436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:02,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:02,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:16:02,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351963104] [2022-01-31 17:16:02,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:02,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:16:02,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:02,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:16:02,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:16:02,025 INFO L87 Difference]: Start difference. First operand 132 states and 139 transitions. Second operand has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 42 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:02,937 INFO L93 Difference]: Finished difference Result 182 states and 196 transitions. [2022-01-31 17:16:02,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:16:02,937 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 42 states have internal predecessors, (111), 2 states have call successors, (3), 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 127 [2022-01-31 17:16:02,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:02,938 INFO L225 Difference]: With dead ends: 182 [2022-01-31 17:16:02,938 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 17:16:02,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:16:02,939 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 117 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:02,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 83 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:02,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 17:16:02,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-01-31 17:16:02,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 128 states have (on average 1.0625) internal successors, (136), 128 states have internal predecessors, (136), 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 17:16:02,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 141 transitions. [2022-01-31 17:16:02,952 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 141 transitions. Word has length 127 [2022-01-31 17:16:02,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:02,952 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 141 transitions. [2022-01-31 17:16:02,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.5813953488372094) internal successors, (111), 42 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:02,953 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 141 transitions. [2022-01-31 17:16:02,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 17:16:02,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:02,953 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:02,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:16:02,953 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:02,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:02,954 INFO L85 PathProgramCache]: Analyzing trace with hash -932306737, now seen corresponding path program 40 times [2022-01-31 17:16:02,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:02,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300471496] [2022-01-31 17:16:02,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:02,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:02,956 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:02,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:02,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:03,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:03,623 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:03,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300471496] [2022-01-31 17:16:03,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [300471496] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:03,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:03,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:16:03,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210070456] [2022-01-31 17:16:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:03,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:16:03,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:03,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:16:03,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:16:03,625 INFO L87 Difference]: Start difference. First operand 134 states and 141 transitions. Second operand has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 43 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:04,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:04,476 INFO L93 Difference]: Finished difference Result 184 states and 198 transitions. [2022-01-31 17:16:04,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:16:04,476 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 43 states have internal predecessors, (113), 2 states have call successors, (3), 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 129 [2022-01-31 17:16:04,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:04,476 INFO L225 Difference]: With dead ends: 184 [2022-01-31 17:16:04,477 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 17:16:04,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:16:04,478 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 119 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:04,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 58 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:04,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 17:16:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-01-31 17:16:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 130 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 17:16:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 143 transitions. [2022-01-31 17:16:04,491 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 143 transitions. Word has length 129 [2022-01-31 17:16:04,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:04,491 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 143 transitions. [2022-01-31 17:16:04,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 43 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:04,491 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 143 transitions. [2022-01-31 17:16:04,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:16:04,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:04,492 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:16:04,492 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash -138925075, now seen corresponding path program 41 times [2022-01-31 17:16:04,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749295287] [2022-01-31 17:16:04,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:04,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:04,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:04,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:04,507 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:04,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:05,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:05,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:05,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:05,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749295287] [2022-01-31 17:16:05,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [749295287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:05,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:05,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:16:05,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331668161] [2022-01-31 17:16:05,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:05,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:16:05,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:05,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:16:05,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:16:05,221 INFO L87 Difference]: Start difference. First operand 136 states and 143 transitions. Second operand has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 44 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:05,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:05,826 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2022-01-31 17:16:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:16:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 44 states have internal predecessors, (115), 2 states have call successors, (3), 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 131 [2022-01-31 17:16:05,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:05,846 INFO L225 Difference]: With dead ends: 186 [2022-01-31 17:16:05,846 INFO L226 Difference]: Without dead ends: 139 [2022-01-31 17:16:05,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:16:05,847 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 121 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:05,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 63 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:05,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-31 17:16:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-01-31 17:16:05,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 132 states have (on average 1.0606060606060606) internal successors, (140), 132 states have internal predecessors, (140), 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 17:16:05,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 145 transitions. [2022-01-31 17:16:05,863 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 145 transitions. Word has length 131 [2022-01-31 17:16:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:05,863 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 145 transitions. [2022-01-31 17:16:05,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.5555555555555554) internal successors, (115), 44 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:05,863 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 145 transitions. [2022-01-31 17:16:05,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 17:16:05,864 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:05,864 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:05,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:16:05,864 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:05,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:05,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2091640715, now seen corresponding path program 42 times [2022-01-31 17:16:05,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:05,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30764172] [2022-01-31 17:16:05,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:05,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:05,866 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:05,866 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:05,870 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:06,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:06,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:06,638 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:06,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30764172] [2022-01-31 17:16:06,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [30764172] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:06,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:06,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:16:06,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225285188] [2022-01-31 17:16:06,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:06,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:16:06,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:06,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:16:06,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:16:06,640 INFO L87 Difference]: Start difference. First operand 138 states and 145 transitions. Second operand has 46 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 45 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:07,624 INFO L93 Difference]: Finished difference Result 188 states and 202 transitions. [2022-01-31 17:16:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:16:07,624 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 45 states have internal predecessors, (117), 2 states have call successors, (3), 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 133 [2022-01-31 17:16:07,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:07,625 INFO L225 Difference]: With dead ends: 188 [2022-01-31 17:16:07,625 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 17:16:07,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:16:07,626 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 123 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:07,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 73 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 17:16:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2022-01-31 17:16:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.0597014925373134) internal successors, (142), 134 states have internal predecessors, (142), 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 17:16:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 147 transitions. [2022-01-31 17:16:07,641 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 147 transitions. Word has length 133 [2022-01-31 17:16:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:07,641 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 147 transitions. [2022-01-31 17:16:07,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.5434782608695654) internal successors, (117), 45 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:07,641 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 147 transitions. [2022-01-31 17:16:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 17:16:07,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:07,642 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:07,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:16:07,642 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:07,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:07,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1818283095, now seen corresponding path program 43 times [2022-01-31 17:16:07,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:07,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509785563] [2022-01-31 17:16:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:07,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:07,644 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:07,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:07,649 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:08,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:08,396 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:08,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509785563] [2022-01-31 17:16:08,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [509785563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:08,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:08,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:16:08,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569350040] [2022-01-31 17:16:08,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:08,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:16:08,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:08,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:16:08,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:16:08,398 INFO L87 Difference]: Start difference. First operand 140 states and 147 transitions. Second operand has 47 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 46 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:09,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:09,361 INFO L93 Difference]: Finished difference Result 190 states and 204 transitions. [2022-01-31 17:16:09,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:16:09,361 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 46 states have internal predecessors, (119), 2 states have call successors, (3), 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 17:16:09,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:09,362 INFO L225 Difference]: With dead ends: 190 [2022-01-31 17:16:09,362 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 17:16:09,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:16:09,364 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 125 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:09,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 68 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:09,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 17:16:09,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-01-31 17:16:09,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 136 states have (on average 1.0588235294117647) internal successors, (144), 136 states have internal predecessors, (144), 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 17:16:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-01-31 17:16:09,378 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 135 [2022-01-31 17:16:09,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:09,379 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-01-31 17:16:09,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.5319148936170213) internal successors, (119), 46 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:09,379 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-01-31 17:16:09,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 17:16:09,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:09,379 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:09,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:16:09,380 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1158680505, now seen corresponding path program 44 times [2022-01-31 17:16:09,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:09,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852304885] [2022-01-31 17:16:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:09,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:09,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:09,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:09,387 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:10,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:10,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:10,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:10,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:10,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852304885] [2022-01-31 17:16:10,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852304885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:10,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:10,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:16:10,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925467111] [2022-01-31 17:16:10,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:10,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:16:10,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:10,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:16:10,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:16:10,178 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:11,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:11,174 INFO L93 Difference]: Finished difference Result 192 states and 206 transitions. [2022-01-31 17:16:11,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:16:11,175 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 2 states have call successors, (3), 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 137 [2022-01-31 17:16:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:11,175 INFO L225 Difference]: With dead ends: 192 [2022-01-31 17:16:11,175 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 17:16:11,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:16:11,177 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 127 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:11,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 63 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 17:16:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-01-31 17:16:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.0579710144927537) internal successors, (146), 138 states have internal predecessors, (146), 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 17:16:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2022-01-31 17:16:11,194 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 137 [2022-01-31 17:16:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:11,194 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2022-01-31 17:16:11,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 47 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2022-01-31 17:16:11,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:16:11,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:11,194 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:11,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:16:11,195 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:11,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1359215973, now seen corresponding path program 45 times [2022-01-31 17:16:11,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:11,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153331516] [2022-01-31 17:16:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:11,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:11,197 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:11,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:11,201 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:11,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:11,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:11,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:11,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:11,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153331516] [2022-01-31 17:16:11,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1153331516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:11,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:11,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:16:11,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128252916] [2022-01-31 17:16:11,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:11,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:16:11,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:11,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:16:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:16:11,994 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:13,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:13,011 INFO L93 Difference]: Finished difference Result 194 states and 208 transitions. [2022-01-31 17:16:13,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:16:13,011 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 2 states have call successors, (3), 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 139 [2022-01-31 17:16:13,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:13,012 INFO L225 Difference]: With dead ends: 194 [2022-01-31 17:16:13,012 INFO L226 Difference]: Without dead ends: 147 [2022-01-31 17:16:13,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:16:13,013 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 129 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:13,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 53 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-01-31 17:16:13,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2022-01-31 17:16:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 140 states have (on average 1.0571428571428572) internal successors, (148), 140 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 17:16:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 153 transitions. [2022-01-31 17:16:13,029 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 153 transitions. Word has length 139 [2022-01-31 17:16:13,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:13,029 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 153 transitions. [2022-01-31 17:16:13,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 48 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:13,030 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 153 transitions. [2022-01-31 17:16:13,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 17:16:13,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:13,030 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:13,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:16:13,030 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:13,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:13,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1303823613, now seen corresponding path program 46 times [2022-01-31 17:16:13,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:13,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007428494] [2022-01-31 17:16:13,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:13,032 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:13,032 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:13,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:13,037 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:13,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:13,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:13,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007428494] [2022-01-31 17:16:13,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1007428494] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:13,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:13,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:16:13,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953459229] [2022-01-31 17:16:13,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:13,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:16:13,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:13,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:16:13,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:16:13,865 INFO L87 Difference]: Start difference. First operand 146 states and 153 transitions. Second operand has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:14,695 INFO L93 Difference]: Finished difference Result 196 states and 210 transitions. [2022-01-31 17:16:14,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:16:14,695 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 2 states have call successors, (3), 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 141 [2022-01-31 17:16:14,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:14,696 INFO L225 Difference]: With dead ends: 196 [2022-01-31 17:16:14,696 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 17:16:14,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:16:14,699 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:14,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 63 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 17:16:14,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-01-31 17:16:14,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.056338028169014) internal successors, (150), 142 states have internal predecessors, (150), 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 17:16:14,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 155 transitions. [2022-01-31 17:16:14,716 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 155 transitions. Word has length 141 [2022-01-31 17:16:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:14,716 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 155 transitions. [2022-01-31 17:16:14,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.5) internal successors, (125), 49 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 155 transitions. [2022-01-31 17:16:14,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 17:16:14,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:14,717 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:14,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:16:14,717 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:14,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:14,717 INFO L85 PathProgramCache]: Analyzing trace with hash -684357343, now seen corresponding path program 47 times [2022-01-31 17:16:14,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:14,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860286744] [2022-01-31 17:16:14,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:14,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:14,719 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:14,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:14,725 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:15,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:15,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:15,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:15,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860286744] [2022-01-31 17:16:15,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1860286744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:15,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:15,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:16:15,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505225409] [2022-01-31 17:16:15,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:15,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:16:15,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:15,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:16:15,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:16:15,383 INFO L87 Difference]: Start difference. First operand 148 states and 155 transitions. Second operand has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 50 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:16,065 INFO L93 Difference]: Finished difference Result 198 states and 212 transitions. [2022-01-31 17:16:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:16:16,066 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 50 states have internal predecessors, (127), 2 states have call successors, (3), 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 143 [2022-01-31 17:16:16,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:16,066 INFO L225 Difference]: With dead ends: 198 [2022-01-31 17:16:16,066 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 17:16:16,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:16:16,068 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 133 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:16,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 58 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 17:16:16,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-01-31 17:16:16,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 144 states have (on average 1.0555555555555556) internal successors, (152), 144 states have internal predecessors, (152), 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 17:16:16,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 157 transitions. [2022-01-31 17:16:16,084 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 157 transitions. Word has length 143 [2022-01-31 17:16:16,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:16,085 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 157 transitions. [2022-01-31 17:16:16,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.4901960784313726) internal successors, (127), 50 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:16,085 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 157 transitions. [2022-01-31 17:16:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 17:16:16,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:16,086 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:16,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:16:16,086 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:16,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1917241279, now seen corresponding path program 48 times [2022-01-31 17:16:16,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:16,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770352416] [2022-01-31 17:16:16,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:16,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:16,088 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:16,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:16,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:16,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:16,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:16,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770352416] [2022-01-31 17:16:16,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770352416] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:16,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:16,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:16:16,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058734442] [2022-01-31 17:16:16,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:16,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:16:16,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:16,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:16:16,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:16:16,996 INFO L87 Difference]: Start difference. First operand 150 states and 157 transitions. Second operand has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:18,127 INFO L93 Difference]: Finished difference Result 200 states and 214 transitions. [2022-01-31 17:16:18,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:16:18,127 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 2 states have call successors, (3), 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 17:16:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:18,128 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:16:18,128 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 17:16:18,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:16:18,129 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 135 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:18,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 63 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 17:16:18,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-01-31 17:16:18,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0547945205479452) internal successors, (154), 146 states have internal predecessors, (154), 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 17:16:18,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 159 transitions. [2022-01-31 17:16:18,146 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 159 transitions. Word has length 145 [2022-01-31 17:16:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:18,146 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 159 transitions. [2022-01-31 17:16:18,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.480769230769231) internal successors, (129), 51 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:18,146 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 159 transitions. [2022-01-31 17:16:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:16:18,147 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:18,147 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:18,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:16:18,147 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1912416547, now seen corresponding path program 49 times [2022-01-31 17:16:18,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:18,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112911074] [2022-01-31 17:16:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:18,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:18,149 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:18,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:18,154 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:18,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:18,956 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:18,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112911074] [2022-01-31 17:16:18,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [112911074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:18,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:18,956 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:16:18,956 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095617775] [2022-01-31 17:16:18,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:18,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:16:18,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:18,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:16:18,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:16:18,958 INFO L87 Difference]: Start difference. First operand 152 states and 159 transitions. Second operand has 53 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 52 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:20,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:20,127 INFO L93 Difference]: Finished difference Result 202 states and 216 transitions. [2022-01-31 17:16:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:16:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 52 states have internal predecessors, (131), 2 states have call successors, (3), 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 147 [2022-01-31 17:16:20,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:20,128 INFO L225 Difference]: With dead ends: 202 [2022-01-31 17:16:20,128 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 17:16:20,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:16:20,130 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 137 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:20,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 53 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:20,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 17:16:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-01-31 17:16:20,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 148 states have (on average 1.054054054054054) internal successors, (156), 148 states have internal predecessors, (156), 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 17:16:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 161 transitions. [2022-01-31 17:16:20,172 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 161 transitions. Word has length 147 [2022-01-31 17:16:20,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:20,172 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 161 transitions. [2022-01-31 17:16:20,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 52 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:20,172 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 161 transitions. [2022-01-31 17:16:20,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 17:16:20,172 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:20,172 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:20,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:16:20,172 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:20,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:20,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1426614661, now seen corresponding path program 50 times [2022-01-31 17:16:20,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:20,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657939114] [2022-01-31 17:16:20,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:20,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:20,177 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:20,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:20,182 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:20,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:20,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:20,868 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:20,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657939114] [2022-01-31 17:16:20,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657939114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:20,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:20,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:16:20,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779719035] [2022-01-31 17:16:20,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:20,868 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:16:20,868 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:20,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:16:20,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:16:20,869 INFO L87 Difference]: Start difference. First operand 154 states and 161 transitions. Second operand has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:21,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:21,706 INFO L93 Difference]: Finished difference Result 204 states and 218 transitions. [2022-01-31 17:16:21,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:16:21,706 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 2 states have call successors, (3), 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 149 [2022-01-31 17:16:21,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:21,707 INFO L225 Difference]: With dead ends: 204 [2022-01-31 17:16:21,707 INFO L226 Difference]: Without dead ends: 157 [2022-01-31 17:16:21,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:16:21,709 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 139 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:21,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 83 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-01-31 17:16:21,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-01-31 17:16:21,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.0533333333333332) internal successors, (158), 150 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 17:16:21,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2022-01-31 17:16:21,727 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 149 [2022-01-31 17:16:21,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:21,727 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2022-01-31 17:16:21,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.462962962962963) internal successors, (133), 53 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:21,728 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2022-01-31 17:16:21,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 17:16:21,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:21,728 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:21,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:16:21,728 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:21,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:21,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1572529817, now seen corresponding path program 51 times [2022-01-31 17:16:21,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:21,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730351430] [2022-01-31 17:16:21,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:21,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:21,730 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:21,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:21,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:21,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:22,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:22,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:22,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730351430] [2022-01-31 17:16:22,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1730351430] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:22,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:22,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:16:22,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121840627] [2022-01-31 17:16:22,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:22,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:16:22,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:16:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:16:22,563 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand has 55 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 54 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:23,373 INFO L93 Difference]: Finished difference Result 206 states and 220 transitions. [2022-01-31 17:16:23,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:16:23,373 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 54 states have internal predecessors, (135), 2 states have call successors, (3), 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 151 [2022-01-31 17:16:23,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:23,374 INFO L225 Difference]: With dead ends: 206 [2022-01-31 17:16:23,374 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 17:16:23,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:16:23,376 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 141 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:23,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 78 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:23,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 17:16:23,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 17:16:23,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 152 states have (on average 1.0526315789473684) internal successors, (160), 152 states have internal predecessors, (160), 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 17:16:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2022-01-31 17:16:23,394 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 151 [2022-01-31 17:16:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:23,394 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2022-01-31 17:16:23,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4545454545454546) internal successors, (135), 54 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:23,395 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2022-01-31 17:16:23,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 17:16:23,395 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:23,395 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:23,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:16:23,395 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:23,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:23,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1827317559, now seen corresponding path program 52 times [2022-01-31 17:16:23,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:23,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655640612] [2022-01-31 17:16:23,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:23,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:23,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:23,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:23,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:24,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:24,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:24,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:24,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655640612] [2022-01-31 17:16:24,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655640612] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:24,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:24,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:16:24,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800279366] [2022-01-31 17:16:24,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:24,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:16:24,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:16:24,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:16:24,411 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:25,521 INFO L93 Difference]: Finished difference Result 208 states and 222 transitions. [2022-01-31 17:16:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:16:25,521 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 2 states have call successors, (3), 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 153 [2022-01-31 17:16:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:25,522 INFO L225 Difference]: With dead ends: 208 [2022-01-31 17:16:25,522 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 17:16:25,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:16:25,523 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 143 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:25,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 73 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 17:16:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-01-31 17:16:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.051948051948052) internal successors, (162), 154 states have internal predecessors, (162), 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 17:16:25,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 167 transitions. [2022-01-31 17:16:25,543 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 167 transitions. Word has length 153 [2022-01-31 17:16:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:25,543 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 167 transitions. [2022-01-31 17:16:25,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.4464285714285716) internal successors, (137), 55 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 167 transitions. [2022-01-31 17:16:25,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:16:25,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:25,544 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:25,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:16:25,544 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:25,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:25,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1865201749, now seen corresponding path program 53 times [2022-01-31 17:16:25,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:25,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199762483] [2022-01-31 17:16:25,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:25,545 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:25,545 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:25,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:25,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:26,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:26,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:26,424 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:26,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199762483] [2022-01-31 17:16:26,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199762483] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:26,424 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:26,424 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:16:26,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951025207] [2022-01-31 17:16:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:26,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:16:26,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:16:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:16:26,425 INFO L87 Difference]: Start difference. First operand 160 states and 167 transitions. Second operand has 57 states, 57 states have (on average 2.43859649122807) internal successors, (139), 56 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:27,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:27,276 INFO L93 Difference]: Finished difference Result 210 states and 224 transitions. [2022-01-31 17:16:27,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:16:27,276 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.43859649122807) internal successors, (139), 56 states have internal predecessors, (139), 2 states have call successors, (3), 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 17:16:27,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:27,276 INFO L225 Difference]: With dead ends: 210 [2022-01-31 17:16:27,276 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 17:16:27,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:16:27,278 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 145 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:27,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 53 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:27,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 17:16:27,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-01-31 17:16:27,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 156 states have (on average 1.0512820512820513) internal successors, (164), 156 states have internal predecessors, (164), 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 17:16:27,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 169 transitions. [2022-01-31 17:16:27,298 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 169 transitions. Word has length 155 [2022-01-31 17:16:27,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:27,298 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 169 transitions. [2022-01-31 17:16:27,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.43859649122807) internal successors, (139), 56 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:27,298 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 169 transitions. [2022-01-31 17:16:27,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 17:16:27,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:27,299 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:27,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:16:27,299 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash -382797325, now seen corresponding path program 54 times [2022-01-31 17:16:27,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:27,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049558080] [2022-01-31 17:16:27,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:27,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:27,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:27,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:27,307 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:27,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:28,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:28,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:28,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049558080] [2022-01-31 17:16:28,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1049558080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:28,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:28,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:16:28,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289024916] [2022-01-31 17:16:28,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:28,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:16:28,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:16:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:16:28,082 INFO L87 Difference]: Start difference. First operand 162 states and 169 transitions. Second operand has 58 states, 58 states have (on average 2.4310344827586206) internal successors, (141), 57 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:29,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:29,158 INFO L93 Difference]: Finished difference Result 212 states and 226 transitions. [2022-01-31 17:16:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:16:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.4310344827586206) internal successors, (141), 57 states have internal predecessors, (141), 2 states have call successors, (3), 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 157 [2022-01-31 17:16:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:29,159 INFO L225 Difference]: With dead ends: 212 [2022-01-31 17:16:29,159 INFO L226 Difference]: Without dead ends: 165 [2022-01-31 17:16:29,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:16:29,160 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 147 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:29,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 63 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-01-31 17:16:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2022-01-31 17:16:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.0506329113924051) internal successors, (166), 158 states have internal predecessors, (166), 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 17:16:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 171 transitions. [2022-01-31 17:16:29,181 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 171 transitions. Word has length 157 [2022-01-31 17:16:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:29,181 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 171 transitions. [2022-01-31 17:16:29,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.4310344827586206) internal successors, (141), 57 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 171 transitions. [2022-01-31 17:16:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 17:16:29,181 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:29,181 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:29,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:16:29,182 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:29,182 INFO L85 PathProgramCache]: Analyzing trace with hash -341357551, now seen corresponding path program 55 times [2022-01-31 17:16:29,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:29,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909202991] [2022-01-31 17:16:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:29,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:29,183 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:29,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:29,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:30,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:30,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:30,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:30,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:30,321 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909202991] [2022-01-31 17:16:30,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [909202991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:30,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:30,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:16:30,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140439529] [2022-01-31 17:16:30,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:30,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:16:30,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:30,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:16:30,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:16:30,323 INFO L87 Difference]: Start difference. First operand 164 states and 171 transitions. Second operand has 59 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 58 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:31,693 INFO L93 Difference]: Finished difference Result 214 states and 228 transitions. [2022-01-31 17:16:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:16:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 58 states have internal predecessors, (143), 2 states have call successors, (3), 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 159 [2022-01-31 17:16:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:31,694 INFO L225 Difference]: With dead ends: 214 [2022-01-31 17:16:31,694 INFO L226 Difference]: Without dead ends: 167 [2022-01-31 17:16:31,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:16:31,695 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:31,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 48 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:31,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-01-31 17:16:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-01-31 17:16:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 160 states have (on average 1.05) internal successors, (168), 160 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 17:16:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 173 transitions. [2022-01-31 17:16:31,717 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 173 transitions. Word has length 159 [2022-01-31 17:16:31,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:31,717 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 173 transitions. [2022-01-31 17:16:31,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 58 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 173 transitions. [2022-01-31 17:16:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 17:16:31,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:31,718 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:31,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:16:31,718 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash 827559599, now seen corresponding path program 56 times [2022-01-31 17:16:31,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:31,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476556618] [2022-01-31 17:16:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:31,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:31,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:31,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:31,728 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:32,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:32,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:32,492 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:32,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476556618] [2022-01-31 17:16:32,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [476556618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:32,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:32,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:16:32,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503115961] [2022-01-31 17:16:32,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:32,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:16:32,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:32,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:16:32,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:16:32,494 INFO L87 Difference]: Start difference. First operand 166 states and 173 transitions. Second operand has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 59 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:33,891 INFO L93 Difference]: Finished difference Result 216 states and 230 transitions. [2022-01-31 17:16:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:16:33,891 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 59 states have internal predecessors, (145), 2 states have call successors, (3), 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 161 [2022-01-31 17:16:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:33,892 INFO L225 Difference]: With dead ends: 216 [2022-01-31 17:16:33,892 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 17:16:33,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:16:33,893 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 151 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:33,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 73 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:33,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 17:16:33,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-01-31 17:16:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0493827160493827) internal successors, (170), 162 states have internal predecessors, (170), 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 17:16:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 175 transitions. [2022-01-31 17:16:33,915 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 175 transitions. Word has length 161 [2022-01-31 17:16:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:33,915 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 175 transitions. [2022-01-31 17:16:33,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.4166666666666665) internal successors, (145), 59 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:33,915 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 175 transitions. [2022-01-31 17:16:33,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:16:33,916 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:33,916 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:33,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:16:33,916 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:33,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1124490803, now seen corresponding path program 57 times [2022-01-31 17:16:33,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:33,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017632735] [2022-01-31 17:16:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:33,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:33,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:33,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:33,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:35,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:35,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:35,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:35,111 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:35,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017632735] [2022-01-31 17:16:35,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017632735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:35,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:35,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:16:35,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377073956] [2022-01-31 17:16:35,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:35,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:16:35,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:35,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:16:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:16:35,113 INFO L87 Difference]: Start difference. First operand 168 states and 175 transitions. Second operand has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 60 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:36,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:36,375 INFO L93 Difference]: Finished difference Result 218 states and 232 transitions. [2022-01-31 17:16:36,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:16:36,375 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 60 states have internal predecessors, (147), 2 states have call successors, (3), 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 163 [2022-01-31 17:16:36,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:36,376 INFO L225 Difference]: With dead ends: 218 [2022-01-31 17:16:36,376 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 17:16:36,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:16:36,377 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 153 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:36,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 63 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 17:16:36,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2022-01-31 17:16:36,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 164 states have (on average 1.048780487804878) internal successors, (172), 164 states have internal predecessors, (172), 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 17:16:36,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2022-01-31 17:16:36,400 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 163 [2022-01-31 17:16:36,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:36,400 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2022-01-31 17:16:36,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.4098360655737703) internal successors, (147), 60 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:36,401 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2022-01-31 17:16:36,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 17:16:36,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:36,401 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:36,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:16:36,401 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:36,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:36,401 INFO L85 PathProgramCache]: Analyzing trace with hash -144218773, now seen corresponding path program 58 times [2022-01-31 17:16:36,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:36,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550396512] [2022-01-31 17:16:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:36,403 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:36,403 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:36,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:36,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:36,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:37,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:37,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:37,668 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:37,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550396512] [2022-01-31 17:16:37,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [550396512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:37,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:37,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:16:37,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645019783] [2022-01-31 17:16:37,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:37,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:16:37,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:37,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:16:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:16:37,670 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 61 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:39,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:39,110 INFO L93 Difference]: Finished difference Result 220 states and 234 transitions. [2022-01-31 17:16:39,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:16:39,111 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 61 states have internal predecessors, (149), 2 states have call successors, (3), 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 17:16:39,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:39,112 INFO L225 Difference]: With dead ends: 220 [2022-01-31 17:16:39,112 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 17:16:39,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:16:39,113 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 155 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:39,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 58 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:39,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 17:16:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 17:16:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.0481927710843373) internal successors, (174), 166 states have internal predecessors, (174), 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 17:16:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2022-01-31 17:16:39,136 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 165 [2022-01-31 17:16:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:39,136 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2022-01-31 17:16:39,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.403225806451613) internal successors, (149), 61 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:39,136 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2022-01-31 17:16:39,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 17:16:39,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:39,137 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:39,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:16:39,137 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:39,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1299364233, now seen corresponding path program 59 times [2022-01-31 17:16:39,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:39,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85817415] [2022-01-31 17:16:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:39,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:39,142 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:39,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:39,148 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:39,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:39,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:39,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:39,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:39,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85817415] [2022-01-31 17:16:39,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [85817415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:39,938 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:39,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:16:39,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817031881] [2022-01-31 17:16:39,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:39,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:16:39,938 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:39,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:16:39,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:16:39,939 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 62 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:41,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:41,046 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2022-01-31 17:16:41,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:16:41,047 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 62 states have internal predecessors, (151), 2 states have call successors, (3), 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 167 [2022-01-31 17:16:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:41,057 INFO L225 Difference]: With dead ends: 222 [2022-01-31 17:16:41,057 INFO L226 Difference]: Without dead ends: 175 [2022-01-31 17:16:41,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:16:41,065 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:41,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 48 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:41,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-01-31 17:16:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-01-31 17:16:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 168 states have (on average 1.0476190476190477) internal successors, (176), 168 states have internal predecessors, (176), 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 17:16:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 181 transitions. [2022-01-31 17:16:41,091 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 181 transitions. Word has length 167 [2022-01-31 17:16:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:41,091 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 181 transitions. [2022-01-31 17:16:41,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 62 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 181 transitions. [2022-01-31 17:16:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 17:16:41,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:41,092 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:41,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:16:41,092 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:41,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1308196391, now seen corresponding path program 60 times [2022-01-31 17:16:41,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:41,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509762149] [2022-01-31 17:16:41,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:41,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:41,094 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:41,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:41,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:42,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:42,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:42,417 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:42,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509762149] [2022-01-31 17:16:42,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509762149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:42,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:42,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:16:42,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968891013] [2022-01-31 17:16:42,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:42,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:16:42,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:16:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:16:42,420 INFO L87 Difference]: Start difference. First operand 174 states and 181 transitions. Second operand has 64 states, 64 states have (on average 2.390625) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:43,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:43,477 INFO L93 Difference]: Finished difference Result 224 states and 238 transitions. [2022-01-31 17:16:43,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:16:43,478 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.390625) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (3), 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 169 [2022-01-31 17:16:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:43,479 INFO L225 Difference]: With dead ends: 224 [2022-01-31 17:16:43,479 INFO L226 Difference]: Without dead ends: 177 [2022-01-31 17:16:43,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:16:43,480 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 159 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:43,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 63 Invalid, 338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:43,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-01-31 17:16:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2022-01-31 17:16:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0470588235294118) internal successors, (178), 170 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 17:16:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 183 transitions. [2022-01-31 17:16:43,517 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 183 transitions. Word has length 169 [2022-01-31 17:16:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:43,517 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 183 transitions. [2022-01-31 17:16:43,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.390625) internal successors, (153), 63 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 183 transitions. [2022-01-31 17:16:43,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:16:43,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:43,518 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:43,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:16:43,518 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1205965637, now seen corresponding path program 61 times [2022-01-31 17:16:43,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:43,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457376747] [2022-01-31 17:16:43,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:43,520 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:43,520 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:43,520 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:43,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:44,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:44,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:44,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:44,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457376747] [2022-01-31 17:16:44,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [457376747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:44,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:44,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:16:44,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006072505] [2022-01-31 17:16:44,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:44,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:16:44,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:16:44,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:16:44,349 INFO L87 Difference]: Start difference. First operand 176 states and 183 transitions. Second operand has 65 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 64 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:45,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:45,454 INFO L93 Difference]: Finished difference Result 226 states and 240 transitions. [2022-01-31 17:16:45,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:16:45,454 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 64 states have internal predecessors, (155), 2 states have call successors, (3), 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 171 [2022-01-31 17:16:45,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:45,455 INFO L225 Difference]: With dead ends: 226 [2022-01-31 17:16:45,455 INFO L226 Difference]: Without dead ends: 179 [2022-01-31 17:16:45,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:16:45,456 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 161 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:45,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 88 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:45,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-01-31 17:16:45,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-01-31 17:16:45,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0465116279069768) internal successors, (180), 172 states have internal predecessors, (180), 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 17:16:45,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 185 transitions. [2022-01-31 17:16:45,482 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 185 transitions. Word has length 171 [2022-01-31 17:16:45,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:45,482 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 185 transitions. [2022-01-31 17:16:45,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.3846153846153846) internal successors, (155), 64 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:45,482 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 185 transitions. [2022-01-31 17:16:45,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 17:16:45,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:45,483 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:45,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:16:45,483 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:45,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:45,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1746458851, now seen corresponding path program 62 times [2022-01-31 17:16:45,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:45,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134781756] [2022-01-31 17:16:45,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:45,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:45,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:45,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:45,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:46,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:46,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:46,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:46,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134781756] [2022-01-31 17:16:46,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1134781756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:46,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:46,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:16:46,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136017757] [2022-01-31 17:16:46,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:46,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:16:46,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:16:46,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:16:46,730 INFO L87 Difference]: Start difference. First operand 178 states and 185 transitions. Second operand has 66 states, 66 states have (on average 2.378787878787879) internal successors, (157), 65 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:47,837 INFO L93 Difference]: Finished difference Result 228 states and 242 transitions. [2022-01-31 17:16:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:16:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.378787878787879) internal successors, (157), 65 states have internal predecessors, (157), 2 states have call successors, (3), 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 173 [2022-01-31 17:16:47,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:47,838 INFO L225 Difference]: With dead ends: 228 [2022-01-31 17:16:47,838 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 17:16:47,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:16:47,839 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 163 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:47,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 63 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:47,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 17:16:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-01-31 17:16:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.0459770114942528) internal successors, (182), 174 states have internal predecessors, (182), 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 17:16:47,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 187 transitions. [2022-01-31 17:16:47,865 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 187 transitions. Word has length 173 [2022-01-31 17:16:47,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:47,865 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 187 transitions. [2022-01-31 17:16:47,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.378787878787879) internal successors, (157), 65 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:47,865 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 187 transitions. [2022-01-31 17:16:47,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 17:16:47,879 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:47,879 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:47,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:16:47,880 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1469394689, now seen corresponding path program 63 times [2022-01-31 17:16:47,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:47,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787377237] [2022-01-31 17:16:47,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:47,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:47,890 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:47,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:47,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:47,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:48,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:48,977 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 17:16:48,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:48,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787377237] [2022-01-31 17:16:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787377237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:48,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:48,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:16:48,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743977940] [2022-01-31 17:16:48,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:48,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:16:48,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:48,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:16:48,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:16:48,979 INFO L87 Difference]: Start difference. First operand 180 states and 187 transitions. Second operand has 67 states, 67 states have (on average 2.373134328358209) internal successors, (159), 66 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:50,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:50,120 INFO L93 Difference]: Finished difference Result 230 states and 244 transitions. [2022-01-31 17:16:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:16:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.373134328358209) internal successors, (159), 66 states have internal predecessors, (159), 2 states have call successors, (3), 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 17:16:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:50,121 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:16:50,121 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 17:16:50,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:16:50,123 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 165 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:50,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 63 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:50,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 17:16:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2022-01-31 17:16:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 176 states have (on average 1.0454545454545454) internal successors, (184), 176 states have internal predecessors, (184), 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 17:16:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 189 transitions. [2022-01-31 17:16:50,150 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 189 transitions. Word has length 175 [2022-01-31 17:16:50,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:50,150 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 189 transitions. [2022-01-31 17:16:50,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.373134328358209) internal successors, (159), 66 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:50,150 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 189 transitions. [2022-01-31 17:16:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 17:16:50,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:50,151 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:50,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:16:50,151 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:50,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:50,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1498707359, now seen corresponding path program 64 times [2022-01-31 17:16:50,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:50,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514577266] [2022-01-31 17:16:50,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:50,152 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:50,152 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:50,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:50,160 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:50,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:51,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:51,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514577266] [2022-01-31 17:16:51,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514577266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:51,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:51,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:16:51,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169228467] [2022-01-31 17:16:51,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:51,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:16:51,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:51,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:16:51,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:16:51,163 INFO L87 Difference]: Start difference. First operand 182 states and 189 transitions. Second operand has 68 states, 68 states have (on average 2.3676470588235294) internal successors, (161), 67 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:52,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:52,469 INFO L93 Difference]: Finished difference Result 232 states and 246 transitions. [2022-01-31 17:16:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:16:52,469 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.3676470588235294) internal successors, (161), 67 states have internal predecessors, (161), 2 states have call successors, (3), 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 177 [2022-01-31 17:16:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:52,470 INFO L225 Difference]: With dead ends: 232 [2022-01-31 17:16:52,470 INFO L226 Difference]: Without dead ends: 185 [2022-01-31 17:16:52,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:16:52,473 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 167 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:52,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 73 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:52,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-01-31 17:16:52,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-01-31 17:16:52,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.0449438202247192) internal successors, (186), 178 states have internal predecessors, (186), 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 17:16:52,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2022-01-31 17:16:52,501 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 177 [2022-01-31 17:16:52,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:52,502 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2022-01-31 17:16:52,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.3676470588235294) internal successors, (161), 67 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:52,502 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2022-01-31 17:16:52,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:16:52,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:52,502 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:52,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:16:52,502 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:52,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:52,503 INFO L85 PathProgramCache]: Analyzing trace with hash -396587843, now seen corresponding path program 65 times [2022-01-31 17:16:52,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:52,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864767468] [2022-01-31 17:16:52,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:52,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:52,504 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:52,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:52,512 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:53,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:53,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:53,620 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:53,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864767468] [2022-01-31 17:16:53,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864767468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:53,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:53,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:16:53,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307814543] [2022-01-31 17:16:53,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:53,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:16:53,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:53,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:16:53,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:16:53,622 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 68 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:54,801 INFO L93 Difference]: Finished difference Result 234 states and 248 transitions. [2022-01-31 17:16:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:16:54,801 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 68 states have internal predecessors, (163), 2 states have call successors, (3), 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 179 [2022-01-31 17:16:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:54,802 INFO L225 Difference]: With dead ends: 234 [2022-01-31 17:16:54,802 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 17:16:54,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:16:54,805 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 169 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:54,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 63 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:16:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 17:16:54,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-01-31 17:16:54,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 180 states have (on average 1.0444444444444445) internal successors, (188), 180 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 17:16:54,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2022-01-31 17:16:54,847 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 179 [2022-01-31 17:16:54,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:54,847 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2022-01-31 17:16:54,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 68 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:54,847 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2022-01-31 17:16:54,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 17:16:54,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:54,848 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:54,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:16:54,848 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:54,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:54,848 INFO L85 PathProgramCache]: Analyzing trace with hash -709143461, now seen corresponding path program 66 times [2022-01-31 17:16:54,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:54,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569867347] [2022-01-31 17:16:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:54,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:54,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:54,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:54,857 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:56,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:56,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:56,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:56,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569867347] [2022-01-31 17:16:56,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [569867347] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:56,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:56,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:16:56,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669206225] [2022-01-31 17:16:56,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:56,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:16:56,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:56,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:16:56,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:16:56,082 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:57,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:57,300 INFO L93 Difference]: Finished difference Result 236 states and 250 transitions. [2022-01-31 17:16:57,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:16:57,300 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 2 states have call successors, (3), 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 181 [2022-01-31 17:16:57,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:57,301 INFO L225 Difference]: With dead ends: 236 [2022-01-31 17:16:57,301 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 17:16:57,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:16:57,304 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 171 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:57,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 68 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:57,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 17:16:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-01-31 17:16:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.043956043956044) internal successors, (190), 182 states have internal predecessors, (190), 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 17:16:57,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 195 transitions. [2022-01-31 17:16:57,350 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 195 transitions. Word has length 181 [2022-01-31 17:16:57,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:57,350 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 195 transitions. [2022-01-31 17:16:57,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 195 transitions. [2022-01-31 17:16:57,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 17:16:57,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:57,351 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:57,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:16:57,351 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:57,351 INFO L85 PathProgramCache]: Analyzing trace with hash -427381639, now seen corresponding path program 67 times [2022-01-31 17:16:57,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:57,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756628160] [2022-01-31 17:16:57,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:57,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:57,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:57,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:57,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:58,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:16:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:16:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:16:58,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:16:58,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756628160] [2022-01-31 17:16:58,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [756628160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:16:58,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:16:58,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:16:58,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423523037] [2022-01-31 17:16:58,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:16:58,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:16:58,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:16:58,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:16:58,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:16:58,351 INFO L87 Difference]: Start difference. First operand 188 states and 195 transitions. Second operand has 71 states, 71 states have (on average 2.352112676056338) internal successors, (167), 70 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:59,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:16:59,585 INFO L93 Difference]: Finished difference Result 238 states and 252 transitions. [2022-01-31 17:16:59,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:16:59,585 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.352112676056338) internal successors, (167), 70 states have internal predecessors, (167), 2 states have call successors, (3), 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 183 [2022-01-31 17:16:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:16:59,586 INFO L225 Difference]: With dead ends: 238 [2022-01-31 17:16:59,586 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 17:16:59,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:16:59,588 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 173 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:16:59,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 68 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:16:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 17:16:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-01-31 17:16:59,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 184 states have (on average 1.0434782608695652) internal successors, (192), 184 states have internal predecessors, (192), 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 17:16:59,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 197 transitions. [2022-01-31 17:16:59,621 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 197 transitions. Word has length 183 [2022-01-31 17:16:59,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:16:59,622 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 197 transitions. [2022-01-31 17:16:59,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.352112676056338) internal successors, (167), 70 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:16:59,622 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 197 transitions. [2022-01-31 17:16:59,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 17:16:59,643 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:16:59,643 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:16:59,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:16:59,644 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:16:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:16:59,644 INFO L85 PathProgramCache]: Analyzing trace with hash -237210345, now seen corresponding path program 68 times [2022-01-31 17:16:59,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:16:59,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527203284] [2022-01-31 17:16:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:16:59,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:16:59,647 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:16:59,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:16:59,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:16:59,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:01,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:01,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:01,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:01,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527203284] [2022-01-31 17:17:01,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [527203284] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:01,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:01,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:17:01,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727855374] [2022-01-31 17:17:01,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:01,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:17:01,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:01,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:17:01,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:17:01,042 INFO L87 Difference]: Start difference. First operand 190 states and 197 transitions. Second operand has 72 states, 72 states have (on average 2.3472222222222223) internal successors, (169), 71 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:02,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:02,328 INFO L93 Difference]: Finished difference Result 240 states and 254 transitions. [2022-01-31 17:17:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:17:02,328 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.3472222222222223) internal successors, (169), 71 states have internal predecessors, (169), 2 states have call successors, (3), 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 17:17:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:02,329 INFO L225 Difference]: With dead ends: 240 [2022-01-31 17:17:02,329 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 17:17:02,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:17:02,332 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 175 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:02,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 58 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:02,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 17:17:02,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-01-31 17:17:02,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.043010752688172) internal successors, (194), 186 states have internal predecessors, (194), 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 17:17:02,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 199 transitions. [2022-01-31 17:17:02,376 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 199 transitions. Word has length 185 [2022-01-31 17:17:02,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:02,377 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 199 transitions. [2022-01-31 17:17:02,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.3472222222222223) internal successors, (169), 71 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:02,377 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 199 transitions. [2022-01-31 17:17:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:17:02,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:02,380 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:02,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:17:02,380 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:02,380 INFO L85 PathProgramCache]: Analyzing trace with hash 2128776757, now seen corresponding path program 69 times [2022-01-31 17:17:02,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:02,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116051779] [2022-01-31 17:17:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:02,382 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:02,382 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:02,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:02,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:02,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:03,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:03,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:03,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:03,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116051779] [2022-01-31 17:17:03,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116051779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:03,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:03,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:17:03,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419946373] [2022-01-31 17:17:03,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:03,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:17:03,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:03,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:17:03,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:17:03,867 INFO L87 Difference]: Start difference. First operand 192 states and 199 transitions. Second operand has 73 states, 73 states have (on average 2.3424657534246576) internal successors, (171), 72 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:05,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:05,142 INFO L93 Difference]: Finished difference Result 242 states and 256 transitions. [2022-01-31 17:17:05,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:17:05,143 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.3424657534246576) internal successors, (171), 72 states have internal predecessors, (171), 2 states have call successors, (3), 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 187 [2022-01-31 17:17:05,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:05,143 INFO L225 Difference]: With dead ends: 242 [2022-01-31 17:17:05,143 INFO L226 Difference]: Without dead ends: 195 [2022-01-31 17:17:05,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:17:05,145 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 177 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:05,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 53 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:05,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-01-31 17:17:05,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2022-01-31 17:17:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 188 states have (on average 1.0425531914893618) internal successors, (196), 188 states have internal predecessors, (196), 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 17:17:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 201 transitions. [2022-01-31 17:17:05,178 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 201 transitions. Word has length 187 [2022-01-31 17:17:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:05,178 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 201 transitions. [2022-01-31 17:17:05,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.3424657534246576) internal successors, (171), 72 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 201 transitions. [2022-01-31 17:17:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 17:17:05,179 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:05,179 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:05,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:17:05,179 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:05,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:05,179 INFO L85 PathProgramCache]: Analyzing trace with hash -490285101, now seen corresponding path program 70 times [2022-01-31 17:17:05,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:05,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532009436] [2022-01-31 17:17:05,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:05,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:05,181 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:05,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:05,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:05,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:06,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:06,592 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:06,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532009436] [2022-01-31 17:17:06,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532009436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:06,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:06,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:17:06,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860791073] [2022-01-31 17:17:06,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:06,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:17:06,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:06,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:17:06,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:17:06,594 INFO L87 Difference]: Start difference. First operand 194 states and 201 transitions. Second operand has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 73 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:08,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:08,076 INFO L93 Difference]: Finished difference Result 244 states and 258 transitions. [2022-01-31 17:17:08,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:17:08,076 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 73 states have internal predecessors, (173), 2 states have call successors, (3), 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 189 [2022-01-31 17:17:08,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:08,077 INFO L225 Difference]: With dead ends: 244 [2022-01-31 17:17:08,077 INFO L226 Difference]: Without dead ends: 197 [2022-01-31 17:17:08,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:17:08,079 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 179 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:08,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 73 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-01-31 17:17:08,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-01-31 17:17:08,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.0421052631578946) internal successors, (198), 190 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 17:17:08,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 203 transitions. [2022-01-31 17:17:08,118 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 203 transitions. Word has length 189 [2022-01-31 17:17:08,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:08,118 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 203 transitions. [2022-01-31 17:17:08,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 73 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:08,118 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 203 transitions. [2022-01-31 17:17:08,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 17:17:08,119 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:08,119 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:08,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:17:08,119 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:08,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -557895183, now seen corresponding path program 71 times [2022-01-31 17:17:08,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:08,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094994644] [2022-01-31 17:17:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:08,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:08,121 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:08,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:08,131 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:08,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:09,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:09,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:09,945 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:09,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094994644] [2022-01-31 17:17:09,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094994644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:09,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:09,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:17:09,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855872985] [2022-01-31 17:17:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:09,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:17:09,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:09,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:17:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:17:09,947 INFO L87 Difference]: Start difference. First operand 196 states and 203 transitions. Second operand has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 74 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:12,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:12,234 INFO L93 Difference]: Finished difference Result 246 states and 260 transitions. [2022-01-31 17:17:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:17:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 74 states have internal predecessors, (175), 2 states have call successors, (3), 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 191 [2022-01-31 17:17:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:12,235 INFO L225 Difference]: With dead ends: 246 [2022-01-31 17:17:12,235 INFO L226 Difference]: Without dead ends: 199 [2022-01-31 17:17:12,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:17:12,236 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 181 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:12,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 73 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-01-31 17:17:12,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-01-31 17:17:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 192 states have (on average 1.0416666666666667) internal successors, (200), 192 states have internal predecessors, (200), 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 17:17:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2022-01-31 17:17:12,290 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 191 [2022-01-31 17:17:12,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:12,291 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2022-01-31 17:17:12,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 74 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:12,291 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2022-01-31 17:17:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 17:17:12,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:12,291 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:12,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:17:12,292 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:12,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:12,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1106674545, now seen corresponding path program 72 times [2022-01-31 17:17:12,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:12,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923034173] [2022-01-31 17:17:12,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:12,293 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:12,293 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:12,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:12,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:12,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:14,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:14,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:14,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:14,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923034173] [2022-01-31 17:17:14,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923034173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:14,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:14,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:17:14,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868130761] [2022-01-31 17:17:14,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:14,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:17:14,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:14,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:17:14,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:17:14,163 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand has 76 states, 76 states have (on average 2.3289473684210527) internal successors, (177), 75 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:15,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:15,650 INFO L93 Difference]: Finished difference Result 248 states and 262 transitions. [2022-01-31 17:17:15,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:17:15,650 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.3289473684210527) internal successors, (177), 75 states have internal predecessors, (177), 2 states have call successors, (3), 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 193 [2022-01-31 17:17:15,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:15,651 INFO L225 Difference]: With dead ends: 248 [2022-01-31 17:17:15,651 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 17:17:15,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:17:15,653 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 183 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:15,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 63 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:15,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 17:17:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-01-31 17:17:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.041237113402062) internal successors, (202), 194 states have internal predecessors, (202), 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 17:17:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2022-01-31 17:17:15,689 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 193 [2022-01-31 17:17:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:15,689 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2022-01-31 17:17:15,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.3289473684210527) internal successors, (177), 75 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2022-01-31 17:17:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:17:15,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:15,690 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:15,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:17:15,690 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:15,690 INFO L85 PathProgramCache]: Analyzing trace with hash -202664019, now seen corresponding path program 73 times [2022-01-31 17:17:15,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:15,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882830070] [2022-01-31 17:17:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:15,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:15,692 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:15,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:15,701 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:16,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:16,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:16,992 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:16,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882830070] [2022-01-31 17:17:16,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [882830070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:16,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:16,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:17:16,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543705478] [2022-01-31 17:17:16,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:16,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:17:16,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:16,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:17:16,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:17:16,994 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand has 77 states, 77 states have (on average 2.324675324675325) internal successors, (179), 76 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:18,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:18,450 INFO L93 Difference]: Finished difference Result 250 states and 264 transitions. [2022-01-31 17:17:18,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:17:18,451 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.324675324675325) internal successors, (179), 76 states have internal predecessors, (179), 2 states have call successors, (3), 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 17:17:18,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:18,451 INFO L225 Difference]: With dead ends: 250 [2022-01-31 17:17:18,451 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 17:17:18,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:17:18,452 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 185 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:18,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 53 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:18,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 17:17:18,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-01-31 17:17:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 196 states have internal predecessors, (204), 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 17:17:18,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 209 transitions. [2022-01-31 17:17:18,491 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 209 transitions. Word has length 195 [2022-01-31 17:17:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:18,491 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 209 transitions. [2022-01-31 17:17:18,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.324675324675325) internal successors, (179), 76 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:18,491 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 209 transitions. [2022-01-31 17:17:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 17:17:18,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:18,496 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:18,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:17:18,496 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:18,496 INFO L85 PathProgramCache]: Analyzing trace with hash 968057675, now seen corresponding path program 74 times [2022-01-31 17:17:18,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:18,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655881139] [2022-01-31 17:17:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:18,501 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:18,501 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:18,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:18,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:19,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:19,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:19,699 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:19,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655881139] [2022-01-31 17:17:19,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [655881139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:19,699 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:19,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:17:19,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396080794] [2022-01-31 17:17:19,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:19,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:17:19,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:19,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:17:19,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:17:19,701 INFO L87 Difference]: Start difference. First operand 202 states and 209 transitions. Second operand has 78 states, 78 states have (on average 2.3205128205128207) internal successors, (181), 77 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:21,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:21,211 INFO L93 Difference]: Finished difference Result 252 states and 266 transitions. [2022-01-31 17:17:21,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:17:21,211 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.3205128205128207) internal successors, (181), 77 states have internal predecessors, (181), 2 states have call successors, (3), 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 197 [2022-01-31 17:17:21,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:21,212 INFO L225 Difference]: With dead ends: 252 [2022-01-31 17:17:21,212 INFO L226 Difference]: Without dead ends: 205 [2022-01-31 17:17:21,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:17:21,214 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 187 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:21,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 68 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-01-31 17:17:21,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-01-31 17:17:21,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.0404040404040404) internal successors, (206), 198 states have internal predecessors, (206), 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 17:17:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 211 transitions. [2022-01-31 17:17:21,249 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 211 transitions. Word has length 197 [2022-01-31 17:17:21,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:21,249 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 211 transitions. [2022-01-31 17:17:21,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.3205128205128207) internal successors, (181), 77 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:21,249 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 211 transitions. [2022-01-31 17:17:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 17:17:21,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:21,258 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:21,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:17:21,258 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:21,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:21,259 INFO L85 PathProgramCache]: Analyzing trace with hash 750174057, now seen corresponding path program 75 times [2022-01-31 17:17:21,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:21,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679140169] [2022-01-31 17:17:21,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:21,260 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:21,260 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:21,260 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:21,270 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:21,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:22,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:22,839 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:22,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679140169] [2022-01-31 17:17:22,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [679140169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:22,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:22,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:17:22,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739421118] [2022-01-31 17:17:22,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:22,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:17:22,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:22,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:17:22,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:17:22,841 INFO L87 Difference]: Start difference. First operand 204 states and 211 transitions. Second operand has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 78 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:24,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:24,398 INFO L93 Difference]: Finished difference Result 254 states and 268 transitions. [2022-01-31 17:17:24,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:17:24,398 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 78 states have internal predecessors, (183), 2 states have call successors, (3), 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 199 [2022-01-31 17:17:24,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:24,399 INFO L225 Difference]: With dead ends: 254 [2022-01-31 17:17:24,399 INFO L226 Difference]: Without dead ends: 207 [2022-01-31 17:17:24,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:17:24,400 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:24,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 68 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-01-31 17:17:24,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 206. [2022-01-31 17:17:24,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 200 states have (on average 1.04) internal successors, (208), 200 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 17:17:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 213 transitions. [2022-01-31 17:17:24,447 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 213 transitions. Word has length 199 [2022-01-31 17:17:24,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:24,447 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 213 transitions. [2022-01-31 17:17:24,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.3164556962025316) internal successors, (183), 78 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 213 transitions. [2022-01-31 17:17:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 17:17:24,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:24,448 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:24,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:17:24,448 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:24,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:24,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1817414663, now seen corresponding path program 76 times [2022-01-31 17:17:24,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:24,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87453290] [2022-01-31 17:17:24,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:24,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:24,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:24,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:24,460 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:26,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:26,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:26,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:26,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:26,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87453290] [2022-01-31 17:17:26,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [87453290] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:26,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:26,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:17:26,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322518862] [2022-01-31 17:17:26,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:26,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:17:26,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:26,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:17:26,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:17:26,128 INFO L87 Difference]: Start difference. First operand 206 states and 213 transitions. Second operand has 80 states, 80 states have (on average 2.3125) internal successors, (185), 79 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:27,851 INFO L93 Difference]: Finished difference Result 256 states and 270 transitions. [2022-01-31 17:17:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:17:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3125) internal successors, (185), 79 states have internal predecessors, (185), 2 states have call successors, (3), 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 201 [2022-01-31 17:17:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:27,852 INFO L225 Difference]: With dead ends: 256 [2022-01-31 17:17:27,852 INFO L226 Difference]: Without dead ends: 209 [2022-01-31 17:17:27,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:17:27,854 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 191 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:27,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 68 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-01-31 17:17:27,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-01-31 17:17:27,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0396039603960396) internal successors, (210), 202 states have internal predecessors, (210), 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 17:17:27,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 215 transitions. [2022-01-31 17:17:27,891 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 215 transitions. Word has length 201 [2022-01-31 17:17:27,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:27,891 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 215 transitions. [2022-01-31 17:17:27,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3125) internal successors, (185), 79 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:27,891 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 215 transitions. [2022-01-31 17:17:27,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:17:27,891 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:27,892 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:27,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:17:27,892 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:27,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:27,892 INFO L85 PathProgramCache]: Analyzing trace with hash 938453285, now seen corresponding path program 77 times [2022-01-31 17:17:27,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:27,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951692024] [2022-01-31 17:17:27,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:27,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:27,893 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:27,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:27,904 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:29,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:29,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:29,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951692024] [2022-01-31 17:17:29,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1951692024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:29,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:29,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:17:29,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200026176] [2022-01-31 17:17:29,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:29,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:17:29,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:17:29,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:17:29,244 INFO L87 Difference]: Start difference. First operand 208 states and 215 transitions. Second operand has 81 states, 81 states have (on average 2.308641975308642) internal successors, (187), 80 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:30,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:30,861 INFO L93 Difference]: Finished difference Result 258 states and 272 transitions. [2022-01-31 17:17:30,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:17:30,861 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.308641975308642) internal successors, (187), 80 states have internal predecessors, (187), 2 states have call successors, (3), 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 203 [2022-01-31 17:17:30,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:30,862 INFO L225 Difference]: With dead ends: 258 [2022-01-31 17:17:30,862 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 17:17:30,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:17:30,863 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 193 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:30,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 63 Invalid, 387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:17:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 17:17:30,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-01-31 17:17:30,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 204 states have (on average 1.0392156862745099) internal successors, (212), 204 states have internal predecessors, (212), 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 17:17:30,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 217 transitions. [2022-01-31 17:17:30,914 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 217 transitions. Word has length 203 [2022-01-31 17:17:30,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:30,915 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 217 transitions. [2022-01-31 17:17:30,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.308641975308642) internal successors, (187), 80 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:30,915 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 217 transitions. [2022-01-31 17:17:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 17:17:30,915 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:30,915 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:30,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:17:30,916 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:30,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1929840957, now seen corresponding path program 78 times [2022-01-31 17:17:30,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:30,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1801075121] [2022-01-31 17:17:30,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:30,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:30,918 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:30,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:30,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:32,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:32,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:32,663 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:32,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1801075121] [2022-01-31 17:17:32,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1801075121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:32,663 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:32,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:17:32,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095841958] [2022-01-31 17:17:32,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:32,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:17:32,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:32,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:17:32,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:17:32,665 INFO L87 Difference]: Start difference. First operand 210 states and 217 transitions. Second operand has 82 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 81 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:34,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:34,321 INFO L93 Difference]: Finished difference Result 260 states and 274 transitions. [2022-01-31 17:17:34,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:17:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 81 states have internal predecessors, (189), 2 states have call successors, (3), 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 17:17:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:34,322 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:17:34,322 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 17:17:34,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:17:34,323 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 195 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:34,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 68 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:34,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 17:17:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2022-01-31 17:17:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.0388349514563107) internal successors, (214), 206 states have internal predecessors, (214), 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 17:17:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2022-01-31 17:17:34,366 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 205 [2022-01-31 17:17:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:34,366 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2022-01-31 17:17:34,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.3048780487804876) internal successors, (189), 81 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2022-01-31 17:17:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 17:17:34,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:34,367 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:34,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:17:34,367 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:34,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash -991603487, now seen corresponding path program 79 times [2022-01-31 17:17:34,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:34,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [611206234] [2022-01-31 17:17:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:34,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:34,369 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:34,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:34,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:36,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:36,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:36,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [611206234] [2022-01-31 17:17:36,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [611206234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:36,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:36,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:17:36,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354548094] [2022-01-31 17:17:36,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:36,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:17:36,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:36,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:17:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:17:36,051 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 82 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:38,193 INFO L93 Difference]: Finished difference Result 262 states and 276 transitions. [2022-01-31 17:17:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:17:38,193 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 82 states have internal predecessors, (191), 2 states have call successors, (3), 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 207 [2022-01-31 17:17:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:38,194 INFO L225 Difference]: With dead ends: 262 [2022-01-31 17:17:38,194 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 17:17:38,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:17:38,196 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 197 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:38,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 73 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 17:17:38,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-01-31 17:17:38,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 208 states have (on average 1.0384615384615385) internal successors, (216), 208 states have internal predecessors, (216), 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 17:17:38,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2022-01-31 17:17:38,236 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 207 [2022-01-31 17:17:38,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:38,236 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2022-01-31 17:17:38,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 82 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:38,236 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2022-01-31 17:17:38,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 17:17:38,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:38,237 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:38,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:17:38,237 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:38,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:38,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1288526977, now seen corresponding path program 80 times [2022-01-31 17:17:38,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:38,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21009576] [2022-01-31 17:17:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:38,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:38,239 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:38,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:38,259 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:38,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:39,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:39,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:39,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:39,583 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:39,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21009576] [2022-01-31 17:17:39,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [21009576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:39,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:39,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:17:39,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897046397] [2022-01-31 17:17:39,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:39,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:17:39,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:39,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:17:39,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:17:39,585 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:41,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:41,346 INFO L93 Difference]: Finished difference Result 264 states and 278 transitions. [2022-01-31 17:17:41,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:17:41,347 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 2 states have call successors, (3), 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 209 [2022-01-31 17:17:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:41,354 INFO L225 Difference]: With dead ends: 264 [2022-01-31 17:17:41,355 INFO L226 Difference]: Without dead ends: 217 [2022-01-31 17:17:41,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:17:41,357 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 199 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:41,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 88 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:41,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-01-31 17:17:41,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-01-31 17:17:41,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.0380952380952382) internal successors, (218), 210 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 17:17:41,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 223 transitions. [2022-01-31 17:17:41,399 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 223 transitions. Word has length 209 [2022-01-31 17:17:41,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:41,399 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 223 transitions. [2022-01-31 17:17:41,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.2976190476190474) internal successors, (193), 83 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:41,399 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 223 transitions. [2022-01-31 17:17:41,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:17:41,400 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:41,400 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:41,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:17:41,400 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:41,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:41,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1130807965, now seen corresponding path program 81 times [2022-01-31 17:17:41,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:41,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165395686] [2022-01-31 17:17:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:41,408 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:41,408 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:41,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:41,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:42,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:42,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:42,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165395686] [2022-01-31 17:17:42,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165395686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:42,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:42,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:17:42,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56299969] [2022-01-31 17:17:42,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:42,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:17:42,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:42,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:17:42,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:17:42,858 INFO L87 Difference]: Start difference. First operand 216 states and 223 transitions. Second operand has 85 states, 85 states have (on average 2.2941176470588234) internal successors, (195), 84 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:44,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:44,939 INFO L93 Difference]: Finished difference Result 266 states and 280 transitions. [2022-01-31 17:17:44,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:17:44,940 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.2941176470588234) internal successors, (195), 84 states have internal predecessors, (195), 2 states have call successors, (3), 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 211 [2022-01-31 17:17:44,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:44,940 INFO L225 Difference]: With dead ends: 266 [2022-01-31 17:17:44,940 INFO L226 Difference]: Without dead ends: 219 [2022-01-31 17:17:44,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:17:44,942 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 201 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:44,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 58 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:44,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-01-31 17:17:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 218. [2022-01-31 17:17:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 212 states have (on average 1.0377358490566038) internal successors, (220), 212 states have internal predecessors, (220), 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 17:17:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 225 transitions. [2022-01-31 17:17:44,984 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 225 transitions. Word has length 211 [2022-01-31 17:17:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:44,984 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 225 transitions. [2022-01-31 17:17:44,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.2941176470588234) internal successors, (195), 84 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 225 transitions. [2022-01-31 17:17:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 17:17:44,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:44,985 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:44,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:17:44,985 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1760587205, now seen corresponding path program 82 times [2022-01-31 17:17:44,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:44,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7069592] [2022-01-31 17:17:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:44,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:44,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:44,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:44,999 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:47,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:47,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:47,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7069592] [2022-01-31 17:17:47,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7069592] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:47,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:47,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:17:47,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319665284] [2022-01-31 17:17:47,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:47,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:17:47,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:47,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:17:47,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:17:47,236 INFO L87 Difference]: Start difference. First operand 218 states and 225 transitions. Second operand has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 85 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:49,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:49,124 INFO L93 Difference]: Finished difference Result 268 states and 282 transitions. [2022-01-31 17:17:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:17:49,124 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 85 states have internal predecessors, (197), 2 states have call successors, (3), 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 213 [2022-01-31 17:17:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:49,125 INFO L225 Difference]: With dead ends: 268 [2022-01-31 17:17:49,125 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 17:17:49,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:17:49,130 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 203 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:49,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 73 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:49,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 17:17:49,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-01-31 17:17:49,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.0373831775700935) internal successors, (222), 214 states have internal predecessors, (222), 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 17:17:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 227 transitions. [2022-01-31 17:17:49,192 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 227 transitions. Word has length 213 [2022-01-31 17:17:49,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:49,193 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 227 transitions. [2022-01-31 17:17:49,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.2906976744186047) internal successors, (197), 85 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 227 transitions. [2022-01-31 17:17:49,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 17:17:49,194 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:49,194 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:49,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:17:49,194 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:49,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:49,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1547505063, now seen corresponding path program 83 times [2022-01-31 17:17:49,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:49,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067497171] [2022-01-31 17:17:49,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:49,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:49,195 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:49,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:49,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:51,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:51,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:51,514 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:51,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067497171] [2022-01-31 17:17:51,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067497171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:51,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:51,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:17:51,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351274370] [2022-01-31 17:17:51,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:51,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:17:51,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:51,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:17:51,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:17:51,515 INFO L87 Difference]: Start difference. First operand 220 states and 227 transitions. Second operand has 87 states, 87 states have (on average 2.2873563218390807) internal successors, (199), 86 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:54,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:17:54,346 INFO L93 Difference]: Finished difference Result 270 states and 284 transitions. [2022-01-31 17:17:54,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:17:54,346 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.2873563218390807) internal successors, (199), 86 states have internal predecessors, (199), 2 states have call successors, (3), 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 17:17:54,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:17:54,347 INFO L225 Difference]: With dead ends: 270 [2022-01-31 17:17:54,347 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 17:17:54,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:17:54,348 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 205 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:17:54,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 73 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:17:54,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 17:17:54,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-01-31 17:17:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 216 states have (on average 1.037037037037037) internal successors, (224), 216 states have internal predecessors, (224), 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 17:17:54,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 229 transitions. [2022-01-31 17:17:54,392 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 229 transitions. Word has length 215 [2022-01-31 17:17:54,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:17:54,392 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 229 transitions. [2022-01-31 17:17:54,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.2873563218390807) internal successors, (199), 86 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:17:54,393 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 229 transitions. [2022-01-31 17:17:54,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 17:17:54,393 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:17:54,393 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:17:54,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:17:54,393 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:17:54,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:17:54,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1360970487, now seen corresponding path program 84 times [2022-01-31 17:17:54,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:17:54,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682600129] [2022-01-31 17:17:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:17:54,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:17:54,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:17:54,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:17:54,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:17:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:56,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:17:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:17:56,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:17:56,866 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:17:56,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682600129] [2022-01-31 17:17:56,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [682600129] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:17:56,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:17:56,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:17:56,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63593949] [2022-01-31 17:17:56,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:17:56,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:17:56,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:17:56,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:17:56,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:17:56,868 INFO L87 Difference]: Start difference. First operand 222 states and 229 transitions. Second operand has 88 states, 88 states have (on average 2.284090909090909) internal successors, (201), 87 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:00,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:00,027 INFO L93 Difference]: Finished difference Result 272 states and 286 transitions. [2022-01-31 17:18:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:18:00,029 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.284090909090909) internal successors, (201), 87 states have internal predecessors, (201), 2 states have call successors, (3), 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 217 [2022-01-31 17:18:00,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:00,029 INFO L225 Difference]: With dead ends: 272 [2022-01-31 17:18:00,030 INFO L226 Difference]: Without dead ends: 225 [2022-01-31 17:18:00,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:18:00,033 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 207 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:00,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 88 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:18:00,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-01-31 17:18:00,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-01-31 17:18:00,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.036697247706422) internal successors, (226), 218 states have internal predecessors, (226), 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 17:18:00,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 231 transitions. [2022-01-31 17:18:00,102 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 231 transitions. Word has length 217 [2022-01-31 17:18:00,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:00,102 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 231 transitions. [2022-01-31 17:18:00,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.284090909090909) internal successors, (201), 87 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:00,102 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 231 transitions. [2022-01-31 17:18:00,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:18:00,103 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:00,103 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:00,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:18:00,103 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:00,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:00,104 INFO L85 PathProgramCache]: Analyzing trace with hash 382264341, now seen corresponding path program 85 times [2022-01-31 17:18:00,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:00,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422020501] [2022-01-31 17:18:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:00,105 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:00,105 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:00,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:00,121 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:02,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:02,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:02,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:02,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422020501] [2022-01-31 17:18:02,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [422020501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:02,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:02,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:18:02,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372778744] [2022-01-31 17:18:02,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:02,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:18:02,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:02,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:18:02,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:18:02,095 INFO L87 Difference]: Start difference. First operand 224 states and 231 transitions. Second operand has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 88 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:04,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:04,006 INFO L93 Difference]: Finished difference Result 274 states and 288 transitions. [2022-01-31 17:18:04,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:18:04,006 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 88 states have internal predecessors, (203), 2 states have call successors, (3), 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 219 [2022-01-31 17:18:04,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:04,007 INFO L225 Difference]: With dead ends: 274 [2022-01-31 17:18:04,007 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 17:18:04,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:18:04,010 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 209 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:04,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 73 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 17:18:04,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-01-31 17:18:04,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 220 states have (on average 1.0363636363636364) internal successors, (228), 220 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 17:18:04,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2022-01-31 17:18:04,057 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 219 [2022-01-31 17:18:04,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:04,058 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2022-01-31 17:18:04,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.2808988764044944) internal successors, (203), 88 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:04,058 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2022-01-31 17:18:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 17:18:04,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:04,058 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:04,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:18:04,059 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:04,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:04,059 INFO L85 PathProgramCache]: Analyzing trace with hash 443495859, now seen corresponding path program 86 times [2022-01-31 17:18:04,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:04,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466634246] [2022-01-31 17:18:04,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:04,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:04,060 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:04,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:04,074 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:05,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:05,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:05,647 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:05,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466634246] [2022-01-31 17:18:05,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [466634246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:05,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:05,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:18:05,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437092963] [2022-01-31 17:18:05,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:05,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:18:05,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:05,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:18:05,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:18:05,649 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand has 90 states, 90 states have (on average 2.2777777777777777) internal successors, (205), 89 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:07,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:07,653 INFO L93 Difference]: Finished difference Result 276 states and 290 transitions. [2022-01-31 17:18:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:18:07,653 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.2777777777777777) internal successors, (205), 89 states have internal predecessors, (205), 2 states have call successors, (3), 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 221 [2022-01-31 17:18:07,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:07,654 INFO L225 Difference]: With dead ends: 276 [2022-01-31 17:18:07,654 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 17:18:07,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:18:07,655 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 211 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:07,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 73 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:07,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 17:18:07,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-01-31 17:18:07,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.0360360360360361) internal successors, (230), 222 states have internal predecessors, (230), 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 17:18:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2022-01-31 17:18:07,703 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 221 [2022-01-31 17:18:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:07,704 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2022-01-31 17:18:07,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.2777777777777777) internal successors, (205), 89 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:07,704 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2022-01-31 17:18:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 17:18:07,704 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:07,704 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:07,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:18:07,704 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:07,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash -842557487, now seen corresponding path program 87 times [2022-01-31 17:18:07,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:07,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302132351] [2022-01-31 17:18:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:07,706 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:07,706 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:07,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:07,719 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:09,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:09,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:09,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:09,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302132351] [2022-01-31 17:18:09,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302132351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:09,800 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:09,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:18:09,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899730651] [2022-01-31 17:18:09,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:09,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:18:09,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:18:09,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:18:09,815 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand has 91 states, 91 states have (on average 2.2747252747252746) internal successors, (207), 90 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:12,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:12,110 INFO L93 Difference]: Finished difference Result 278 states and 292 transitions. [2022-01-31 17:18:12,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:18:12,110 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.2747252747252746) internal successors, (207), 90 states have internal predecessors, (207), 2 states have call successors, (3), 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 223 [2022-01-31 17:18:12,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:12,111 INFO L225 Difference]: With dead ends: 278 [2022-01-31 17:18:12,111 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 17:18:12,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:18:12,114 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 213 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:12,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 68 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:12,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 17:18:12,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 230. [2022-01-31 17:18:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 224 states have (on average 1.0357142857142858) internal successors, (232), 224 states have internal predecessors, (232), 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 17:18:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 237 transitions. [2022-01-31 17:18:12,180 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 237 transitions. Word has length 223 [2022-01-31 17:18:12,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:12,180 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 237 transitions. [2022-01-31 17:18:12,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.2747252747252746) internal successors, (207), 90 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:12,180 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 237 transitions. [2022-01-31 17:18:12,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 17:18:12,183 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:12,183 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:12,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:18:12,183 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:12,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:12,183 INFO L85 PathProgramCache]: Analyzing trace with hash 210758255, now seen corresponding path program 88 times [2022-01-31 17:18:12,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:12,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279500960] [2022-01-31 17:18:12,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:12,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:12,185 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:12,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:12,199 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:13,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:13,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279500960] [2022-01-31 17:18:13,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [279500960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:13,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:13,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:18:13,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383625751] [2022-01-31 17:18:13,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:13,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:18:13,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:13,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:18:13,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:18:13,791 INFO L87 Difference]: Start difference. First operand 230 states and 237 transitions. Second operand has 92 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 91 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:15,827 INFO L93 Difference]: Finished difference Result 280 states and 294 transitions. [2022-01-31 17:18:15,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:18:15,827 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 91 states have internal predecessors, (209), 2 states have call successors, (3), 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 17:18:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:15,828 INFO L225 Difference]: With dead ends: 280 [2022-01-31 17:18:15,828 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 17:18:15,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:18:15,831 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 215 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:15,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 53 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:18:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 17:18:15,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-01-31 17:18:15,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0353982300884956) internal successors, (234), 226 states have internal predecessors, (234), 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 17:18:15,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 239 transitions. [2022-01-31 17:18:15,879 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 239 transitions. Word has length 225 [2022-01-31 17:18:15,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:15,879 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 239 transitions. [2022-01-31 17:18:15,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.2717391304347827) internal successors, (209), 91 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:15,907 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 239 transitions. [2022-01-31 17:18:15,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:18:15,908 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:15,908 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:15,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:18:15,908 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1165095539, now seen corresponding path program 89 times [2022-01-31 17:18:15,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:15,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506083316] [2022-01-31 17:18:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:15,910 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:15,910 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:15,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:15,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:18,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:18,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:18,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506083316] [2022-01-31 17:18:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506083316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:18,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:18,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:18:18,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697459216] [2022-01-31 17:18:18,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:18,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:18:18,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:18,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:18:18,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:18:18,589 INFO L87 Difference]: Start difference. First operand 232 states and 239 transitions. Second operand has 93 states, 93 states have (on average 2.2688172043010755) internal successors, (211), 92 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:21,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:21,148 INFO L93 Difference]: Finished difference Result 282 states and 296 transitions. [2022-01-31 17:18:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:18:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.2688172043010755) internal successors, (211), 92 states have internal predecessors, (211), 2 states have call successors, (3), 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 227 [2022-01-31 17:18:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:21,149 INFO L225 Difference]: With dead ends: 282 [2022-01-31 17:18:21,149 INFO L226 Difference]: Without dead ends: 235 [2022-01-31 17:18:21,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:18:21,158 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:21,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 63 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:21,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-01-31 17:18:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-01-31 17:18:21,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 228 states have (on average 1.0350877192982457) internal successors, (236), 228 states have internal predecessors, (236), 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 17:18:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 241 transitions. [2022-01-31 17:18:21,210 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 241 transitions. Word has length 227 [2022-01-31 17:18:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:21,210 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 241 transitions. [2022-01-31 17:18:21,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.2688172043010755) internal successors, (211), 92 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:21,210 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 241 transitions. [2022-01-31 17:18:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 17:18:21,211 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:21,211 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:21,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:18:21,211 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:21,211 INFO L85 PathProgramCache]: Analyzing trace with hash -510664405, now seen corresponding path program 90 times [2022-01-31 17:18:21,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:21,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772510048] [2022-01-31 17:18:21,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:21,213 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:21,213 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:21,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:21,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:22,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:22,959 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:22,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772510048] [2022-01-31 17:18:22,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [772510048] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:22,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:22,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:18:22,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211165626] [2022-01-31 17:18:22,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:22,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:18:22,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:18:22,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:18:22,963 INFO L87 Difference]: Start difference. First operand 234 states and 241 transitions. Second operand has 94 states, 94 states have (on average 2.265957446808511) internal successors, (213), 93 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:25,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:25,093 INFO L93 Difference]: Finished difference Result 284 states and 298 transitions. [2022-01-31 17:18:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:18:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.265957446808511) internal successors, (213), 93 states have internal predecessors, (213), 2 states have call successors, (3), 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 229 [2022-01-31 17:18:25,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:25,094 INFO L225 Difference]: With dead ends: 284 [2022-01-31 17:18:25,094 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 17:18:25,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:18:25,096 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 219 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:25,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 78 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 17:18:25,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 236. [2022-01-31 17:18:25,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.0347826086956522) internal successors, (238), 230 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 17:18:25,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 243 transitions. [2022-01-31 17:18:25,148 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 243 transitions. Word has length 229 [2022-01-31 17:18:25,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:25,148 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 243 transitions. [2022-01-31 17:18:25,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.265957446808511) internal successors, (213), 93 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 243 transitions. [2022-01-31 17:18:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 17:18:25,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:25,149 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:25,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:18:25,149 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:25,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:25,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1332430153, now seen corresponding path program 91 times [2022-01-31 17:18:25,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:25,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259453186] [2022-01-31 17:18:25,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:25,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:25,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:25,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:25,166 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:27,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:27,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:27,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:27,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259453186] [2022-01-31 17:18:27,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259453186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:27,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:27,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:18:27,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022685526] [2022-01-31 17:18:27,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:27,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:18:27,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:27,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:18:27,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:18:27,198 INFO L87 Difference]: Start difference. First operand 236 states and 243 transitions. Second operand has 95 states, 95 states have (on average 2.263157894736842) internal successors, (215), 94 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:29,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:29,331 INFO L93 Difference]: Finished difference Result 286 states and 300 transitions. [2022-01-31 17:18:29,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:18:29,331 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.263157894736842) internal successors, (215), 94 states have internal predecessors, (215), 2 states have call successors, (3), 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 231 [2022-01-31 17:18:29,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:29,332 INFO L225 Difference]: With dead ends: 286 [2022-01-31 17:18:29,332 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 17:18:29,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:18:29,333 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 221 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:29,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 63 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:29,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 17:18:29,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-01-31 17:18:29,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 232 states have (on average 1.0344827586206897) internal successors, (240), 232 states have internal predecessors, (240), 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 17:18:29,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 245 transitions. [2022-01-31 17:18:29,386 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 245 transitions. Word has length 231 [2022-01-31 17:18:29,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:29,386 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 245 transitions. [2022-01-31 17:18:29,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.263157894736842) internal successors, (215), 94 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:29,386 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 245 transitions. [2022-01-31 17:18:29,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 17:18:29,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:29,387 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:29,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:18:29,387 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1275192857, now seen corresponding path program 92 times [2022-01-31 17:18:29,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:29,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008444253] [2022-01-31 17:18:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:29,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:29,389 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:29,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:29,405 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:31,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:31,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:31,144 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:31,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008444253] [2022-01-31 17:18:31,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1008444253] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:31,144 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:31,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:18:31,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342308618] [2022-01-31 17:18:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:31,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:18:31,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:18:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:18:31,147 INFO L87 Difference]: Start difference. First operand 238 states and 245 transitions. Second operand has 96 states, 96 states have (on average 2.2604166666666665) internal successors, (217), 95 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:33,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:33,376 INFO L93 Difference]: Finished difference Result 288 states and 302 transitions. [2022-01-31 17:18:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:18:33,377 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.2604166666666665) internal successors, (217), 95 states have internal predecessors, (217), 2 states have call successors, (3), 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 233 [2022-01-31 17:18:33,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:33,377 INFO L225 Difference]: With dead ends: 288 [2022-01-31 17:18:33,377 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 17:18:33,381 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:18:33,381 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 223 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:33,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 98 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:33,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 17:18:33,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-01-31 17:18:33,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0341880341880343) internal successors, (242), 234 states have internal predecessors, (242), 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 17:18:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 247 transitions. [2022-01-31 17:18:33,448 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 247 transitions. Word has length 233 [2022-01-31 17:18:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:33,448 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 247 transitions. [2022-01-31 17:18:33,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.2604166666666665) internal successors, (217), 95 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 247 transitions. [2022-01-31 17:18:33,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:18:33,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:33,449 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:33,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:18:33,450 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1059995397, now seen corresponding path program 93 times [2022-01-31 17:18:33,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:33,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20572771] [2022-01-31 17:18:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:33,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:33,453 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:33,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:33,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:35,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:35,272 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:35,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20572771] [2022-01-31 17:18:35,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [20572771] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:35,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:35,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:18:35,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388150926] [2022-01-31 17:18:35,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:35,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:18:35,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:35,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:18:35,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:18:35,274 INFO L87 Difference]: Start difference. First operand 240 states and 247 transitions. Second operand has 97 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 96 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:37,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:37,607 INFO L93 Difference]: Finished difference Result 290 states and 304 transitions. [2022-01-31 17:18:37,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:18:37,612 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 96 states have internal predecessors, (219), 2 states have call successors, (3), 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 17:18:37,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:37,613 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:18:37,613 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 17:18:37,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:18:37,616 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 225 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:37,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 68 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 17:18:37,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2022-01-31 17:18:37,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 236 states have (on average 1.0338983050847457) internal successors, (244), 236 states have internal predecessors, (244), 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 17:18:37,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2022-01-31 17:18:37,696 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 235 [2022-01-31 17:18:37,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:37,696 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2022-01-31 17:18:37,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.2577319587628866) internal successors, (219), 96 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:37,696 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2022-01-31 17:18:37,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 17:18:37,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:37,697 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:37,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:18:37,697 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:37,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1091988317, now seen corresponding path program 94 times [2022-01-31 17:18:37,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:37,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627482091] [2022-01-31 17:18:37,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:37,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:37,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:37,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:37,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:40,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:40,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:40,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627482091] [2022-01-31 17:18:40,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1627482091] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:40,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:40,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:18:40,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859071595] [2022-01-31 17:18:40,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:40,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:18:40,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:40,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:18:40,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:18:40,674 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand has 98 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 97 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:43,270 INFO L93 Difference]: Finished difference Result 292 states and 306 transitions. [2022-01-31 17:18:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:18:43,271 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 97 states have internal predecessors, (221), 2 states have call successors, (3), 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 237 [2022-01-31 17:18:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:43,271 INFO L225 Difference]: With dead ends: 292 [2022-01-31 17:18:43,272 INFO L226 Difference]: Without dead ends: 245 [2022-01-31 17:18:43,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:18:43,275 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 227 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:43,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 63 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 338 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:43,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-01-31 17:18:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-01-31 17:18:43,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.0336134453781514) internal successors, (246), 238 states have internal predecessors, (246), 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 17:18:43,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 251 transitions. [2022-01-31 17:18:43,344 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 251 transitions. Word has length 237 [2022-01-31 17:18:43,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:43,344 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 251 transitions. [2022-01-31 17:18:43,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2551020408163267) internal successors, (221), 97 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:43,344 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 251 transitions. [2022-01-31 17:18:43,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 17:18:43,345 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:43,345 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:43,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:18:43,345 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:43,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:43,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1025899201, now seen corresponding path program 95 times [2022-01-31 17:18:43,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:43,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491586886] [2022-01-31 17:18:43,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:43,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:43,349 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:43,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:43,365 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:45,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:45,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:45,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:45,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491586886] [2022-01-31 17:18:45,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [491586886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:45,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:45,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:18:45,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462658694] [2022-01-31 17:18:45,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:45,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:18:45,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:45,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:18:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:18:45,188 INFO L87 Difference]: Start difference. First operand 244 states and 251 transitions. Second operand has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 98 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:48,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:48,038 INFO L93 Difference]: Finished difference Result 294 states and 308 transitions. [2022-01-31 17:18:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:18:48,039 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 98 states have internal predecessors, (223), 2 states have call successors, (3), 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 239 [2022-01-31 17:18:48,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:48,039 INFO L225 Difference]: With dead ends: 294 [2022-01-31 17:18:48,039 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 17:18:48,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:18:48,043 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 229 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:48,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 68 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:48,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 17:18:48,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-01-31 17:18:48,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 240 states have (on average 1.0333333333333334) internal successors, (248), 240 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 17:18:48,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 253 transitions. [2022-01-31 17:18:48,125 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 253 transitions. Word has length 239 [2022-01-31 17:18:48,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:48,125 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 253 transitions. [2022-01-31 17:18:48,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.2525252525252526) internal successors, (223), 98 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:48,125 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 253 transitions. [2022-01-31 17:18:48,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 17:18:48,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:48,126 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:48,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:18:48,126 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:48,126 INFO L85 PathProgramCache]: Analyzing trace with hash 501305695, now seen corresponding path program 96 times [2022-01-31 17:18:48,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:48,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639608779] [2022-01-31 17:18:48,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:48,128 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:48,128 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:48,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:48,143 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:48,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:50,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:50,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:50,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639608779] [2022-01-31 17:18:50,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [639608779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:50,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:50,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:18:50,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825255529] [2022-01-31 17:18:50,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:50,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:18:50,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:50,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:18:50,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:18:50,961 INFO L87 Difference]: Start difference. First operand 246 states and 253 transitions. Second operand has 100 states, 100 states have (on average 2.25) internal successors, (225), 99 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:53,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:53,587 INFO L93 Difference]: Finished difference Result 296 states and 310 transitions. [2022-01-31 17:18:53,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:18:53,587 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.25) internal successors, (225), 99 states have internal predecessors, (225), 2 states have call successors, (3), 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 241 [2022-01-31 17:18:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:53,591 INFO L225 Difference]: With dead ends: 296 [2022-01-31 17:18:53,591 INFO L226 Difference]: Without dead ends: 249 [2022-01-31 17:18:53,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:18:53,595 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 231 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:53,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 63 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:53,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-01-31 17:18:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 248. [2022-01-31 17:18:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.0330578512396693) internal successors, (250), 242 states have internal predecessors, (250), 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 17:18:53,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 255 transitions. [2022-01-31 17:18:53,673 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 255 transitions. Word has length 241 [2022-01-31 17:18:53,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:53,673 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 255 transitions. [2022-01-31 17:18:53,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.25) internal successors, (225), 99 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:53,673 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 255 transitions. [2022-01-31 17:18:53,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:18:53,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:53,674 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:53,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:18:53,674 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:53,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:53,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1121879939, now seen corresponding path program 97 times [2022-01-31 17:18:53,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:53,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [990266019] [2022-01-31 17:18:53,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:53,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:53,676 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:53,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:53,691 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:55,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:18:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:18:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:18:55,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:18:55,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [990266019] [2022-01-31 17:18:55,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [990266019] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:18:55,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:18:55,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:18:55,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536638926] [2022-01-31 17:18:55,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:18:55,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:18:55,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:18:55,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:18:55,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:18:55,577 INFO L87 Difference]: Start difference. First operand 248 states and 255 transitions. Second operand has 101 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 100 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:58,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:18:58,475 INFO L93 Difference]: Finished difference Result 298 states and 312 transitions. [2022-01-31 17:18:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:18:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 100 states have internal predecessors, (227), 2 states have call successors, (3), 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 243 [2022-01-31 17:18:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:18:58,480 INFO L225 Difference]: With dead ends: 298 [2022-01-31 17:18:58,480 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 17:18:58,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:18:58,499 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 233 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:18:58,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 68 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:18:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 17:18:58,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-01-31 17:18:58,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 244 states have (on average 1.0327868852459017) internal successors, (252), 244 states have internal predecessors, (252), 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 17:18:58,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 257 transitions. [2022-01-31 17:18:58,600 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 257 transitions. Word has length 243 [2022-01-31 17:18:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:18:58,600 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 257 transitions. [2022-01-31 17:18:58,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 100 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:18:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 257 transitions. [2022-01-31 17:18:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 17:18:58,601 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:18:58,601 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:18:58,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:18:58,601 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:18:58,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:18:58,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1930145765, now seen corresponding path program 98 times [2022-01-31 17:18:58,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:18:58,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160303259] [2022-01-31 17:18:58,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:18:58,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:18:58,602 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:18:58,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:18:58,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:18:58,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:00,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:00,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:00,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160303259] [2022-01-31 17:19:00,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1160303259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:00,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:00,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:19:00,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995670540] [2022-01-31 17:19:00,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:00,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:19:00,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:00,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:19:00,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:19:00,863 INFO L87 Difference]: Start difference. First operand 250 states and 257 transitions. Second operand has 102 states, 102 states have (on average 2.2450980392156863) internal successors, (229), 101 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:03,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:03,452 INFO L93 Difference]: Finished difference Result 300 states and 314 transitions. [2022-01-31 17:19:03,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:19:03,452 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.2450980392156863) internal successors, (229), 101 states have internal predecessors, (229), 2 states have call successors, (3), 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 17:19:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:03,453 INFO L225 Difference]: With dead ends: 300 [2022-01-31 17:19:03,453 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 17:19:03,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:19:03,455 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 235 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:03,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 73 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:03,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 17:19:03,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2022-01-31 17:19:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.032520325203252) internal successors, (254), 246 states have internal predecessors, (254), 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 17:19:03,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 259 transitions. [2022-01-31 17:19:03,513 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 259 transitions. Word has length 245 [2022-01-31 17:19:03,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:03,514 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 259 transitions. [2022-01-31 17:19:03,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.2450980392156863) internal successors, (229), 101 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:03,514 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 259 transitions. [2022-01-31 17:19:03,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 17:19:03,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:03,514 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:03,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:19:03,515 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:03,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:03,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1284523975, now seen corresponding path program 99 times [2022-01-31 17:19:03,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:03,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361000037] [2022-01-31 17:19:03,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:03,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:03,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:03,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:03,531 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:05,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:05,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:05,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:05,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361000037] [2022-01-31 17:19:05,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361000037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:05,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:05,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:19:05,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678444665] [2022-01-31 17:19:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:05,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:19:05,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:05,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:19:05,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:19:05,491 INFO L87 Difference]: Start difference. First operand 252 states and 259 transitions. Second operand has 103 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 102 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:08,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:08,318 INFO L93 Difference]: Finished difference Result 302 states and 316 transitions. [2022-01-31 17:19:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:19:08,319 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 102 states have internal predecessors, (231), 2 states have call successors, (3), 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 247 [2022-01-31 17:19:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:08,319 INFO L225 Difference]: With dead ends: 302 [2022-01-31 17:19:08,319 INFO L226 Difference]: Without dead ends: 255 [2022-01-31 17:19:08,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:19:08,321 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:08,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 68 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:08,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-01-31 17:19:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2022-01-31 17:19:08,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 248 states have (on average 1.032258064516129) internal successors, (256), 248 states have internal predecessors, (256), 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 17:19:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2022-01-31 17:19:08,382 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 247 [2022-01-31 17:19:08,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:08,382 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2022-01-31 17:19:08,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.2427184466019416) internal successors, (231), 102 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:08,382 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2022-01-31 17:19:08,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 17:19:08,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:08,383 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:08,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:19:08,383 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:08,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:08,383 INFO L85 PathProgramCache]: Analyzing trace with hash 682725591, now seen corresponding path program 100 times [2022-01-31 17:19:08,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:08,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787547096] [2022-01-31 17:19:08,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:08,384 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:08,384 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:08,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:08,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:10,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:10,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:10,436 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:10,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787547096] [2022-01-31 17:19:10,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [787547096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:10,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:10,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:19:10,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427336387] [2022-01-31 17:19:10,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:10,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:19:10,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:10,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:19:10,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:19:10,439 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand has 104 states, 104 states have (on average 2.2403846153846154) internal successors, (233), 103 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:13,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:13,726 INFO L93 Difference]: Finished difference Result 304 states and 318 transitions. [2022-01-31 17:19:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:19:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.2403846153846154) internal successors, (233), 103 states have internal predecessors, (233), 2 states have call successors, (3), 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 249 [2022-01-31 17:19:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:13,727 INFO L225 Difference]: With dead ends: 304 [2022-01-31 17:19:13,727 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 17:19:13,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:19:13,730 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 239 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:13,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 68 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 17:19:13,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-01-31 17:19:13,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.032) internal successors, (258), 250 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 17:19:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2022-01-31 17:19:13,804 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 249 [2022-01-31 17:19:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:13,804 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2022-01-31 17:19:13,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.2403846153846154) internal successors, (233), 103 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2022-01-31 17:19:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:19:13,805 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:13,805 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:13,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:19:13,805 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:13,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:13,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1423948277, now seen corresponding path program 101 times [2022-01-31 17:19:13,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:13,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740866706] [2022-01-31 17:19:13,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:13,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:13,807 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:13,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:13,823 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:17,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:17,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:17,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:17,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740866706] [2022-01-31 17:19:17,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1740866706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:17,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:17,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:19:17,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594758251] [2022-01-31 17:19:17,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:17,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:19:17,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:19:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:19:17,158 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand has 105 states, 105 states have (on average 2.238095238095238) internal successors, (235), 104 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:19,832 INFO L93 Difference]: Finished difference Result 306 states and 320 transitions. [2022-01-31 17:19:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:19:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.238095238095238) internal successors, (235), 104 states have internal predecessors, (235), 2 states have call successors, (3), 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 251 [2022-01-31 17:19:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:19,833 INFO L225 Difference]: With dead ends: 306 [2022-01-31 17:19:19,833 INFO L226 Difference]: Without dead ends: 259 [2022-01-31 17:19:19,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:19:19,836 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 241 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:19,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 58 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-01-31 17:19:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 258. [2022-01-31 17:19:19,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 252 states have (on average 1.0317460317460319) internal successors, (260), 252 states have internal predecessors, (260), 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 17:19:19,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 265 transitions. [2022-01-31 17:19:19,898 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 265 transitions. Word has length 251 [2022-01-31 17:19:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:19,898 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 265 transitions. [2022-01-31 17:19:19,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.238095238095238) internal successors, (235), 104 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 265 transitions. [2022-01-31 17:19:19,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 17:19:19,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:19,899 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:19,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:19:19,899 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:19,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:19,899 INFO L85 PathProgramCache]: Analyzing trace with hash 774378387, now seen corresponding path program 102 times [2022-01-31 17:19:19,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:19,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377269482] [2022-01-31 17:19:19,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:19,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:19,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:19,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:19,919 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:22,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:22,070 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:22,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377269482] [2022-01-31 17:19:22,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377269482] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:22,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:22,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:19:22,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442496049] [2022-01-31 17:19:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:22,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:19:22,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:22,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:19:22,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:19:22,074 INFO L87 Difference]: Start difference. First operand 258 states and 265 transitions. Second operand has 106 states, 106 states have (on average 2.2358490566037736) internal successors, (237), 105 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:24,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:24,744 INFO L93 Difference]: Finished difference Result 308 states and 322 transitions. [2022-01-31 17:19:24,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:19:24,744 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.2358490566037736) internal successors, (237), 105 states have internal predecessors, (237), 2 states have call successors, (3), 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 253 [2022-01-31 17:19:24,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:24,745 INFO L225 Difference]: With dead ends: 308 [2022-01-31 17:19:24,745 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 17:19:24,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:19:24,748 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:24,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 68 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:24,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 17:19:24,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 260. [2022-01-31 17:19:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.031496062992126) internal successors, (262), 254 states have internal predecessors, (262), 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 17:19:24,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 267 transitions. [2022-01-31 17:19:24,826 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 267 transitions. Word has length 253 [2022-01-31 17:19:24,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:24,826 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 267 transitions. [2022-01-31 17:19:24,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.2358490566037736) internal successors, (237), 105 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:24,826 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 267 transitions. [2022-01-31 17:19:24,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 17:19:24,827 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:24,827 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:24,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:19:24,827 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:24,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:24,827 INFO L85 PathProgramCache]: Analyzing trace with hash -692027983, now seen corresponding path program 103 times [2022-01-31 17:19:24,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:24,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037750345] [2022-01-31 17:19:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:24,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:24,829 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:24,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:24,847 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:26,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:26,971 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:26,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037750345] [2022-01-31 17:19:26,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037750345] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:26,971 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:26,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:19:26,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760174314] [2022-01-31 17:19:26,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:26,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:19:26,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:26,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:19:26,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:19:26,973 INFO L87 Difference]: Start difference. First operand 260 states and 267 transitions. Second operand has 107 states, 107 states have (on average 2.2336448598130842) internal successors, (239), 106 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:29,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:29,656 INFO L93 Difference]: Finished difference Result 310 states and 324 transitions. [2022-01-31 17:19:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:19:29,656 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.2336448598130842) internal successors, (239), 106 states have internal predecessors, (239), 2 states have call successors, (3), 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 17:19:29,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:29,656 INFO L225 Difference]: With dead ends: 310 [2022-01-31 17:19:29,656 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 17:19:29,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:19:29,659 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 245 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:29,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 83 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:29,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 17:19:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-01-31 17:19:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 256 states have (on average 1.03125) internal successors, (264), 256 states have internal predecessors, (264), 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 17:19:29,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 269 transitions. [2022-01-31 17:19:29,726 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 269 transitions. Word has length 255 [2022-01-31 17:19:29,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:29,726 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 269 transitions. [2022-01-31 17:19:29,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.2336448598130842) internal successors, (239), 106 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:29,726 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 269 transitions. [2022-01-31 17:19:29,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 17:19:29,727 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:29,727 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:29,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:19:29,727 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:29,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1159276465, now seen corresponding path program 104 times [2022-01-31 17:19:29,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:29,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407162005] [2022-01-31 17:19:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:29,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:29,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:29,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:29,749 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:29,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:31,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:31,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407162005] [2022-01-31 17:19:31,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1407162005] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:31,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:31,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:19:31,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740519556] [2022-01-31 17:19:31,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:31,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:19:31,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:31,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:19:31,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:19:31,915 INFO L87 Difference]: Start difference. First operand 262 states and 269 transitions. Second operand has 108 states, 108 states have (on average 2.2314814814814814) internal successors, (241), 107 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:34,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:34,644 INFO L93 Difference]: Finished difference Result 312 states and 326 transitions. [2022-01-31 17:19:34,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:19:34,644 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.2314814814814814) internal successors, (241), 107 states have internal predecessors, (241), 2 states have call successors, (3), 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 257 [2022-01-31 17:19:34,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:34,645 INFO L225 Difference]: With dead ends: 312 [2022-01-31 17:19:34,645 INFO L226 Difference]: Without dead ends: 265 [2022-01-31 17:19:34,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:19:34,648 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 247 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:34,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 53 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-01-31 17:19:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2022-01-31 17:19:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0310077519379846) internal successors, (266), 258 states have internal predecessors, (266), 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 17:19:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 271 transitions. [2022-01-31 17:19:34,713 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 271 transitions. Word has length 257 [2022-01-31 17:19:34,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:34,714 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 271 transitions. [2022-01-31 17:19:34,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.2314814814814814) internal successors, (241), 107 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 271 transitions. [2022-01-31 17:19:34,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:19:34,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:34,714 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:34,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:19:34,714 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:34,715 INFO L85 PathProgramCache]: Analyzing trace with hash 786498413, now seen corresponding path program 105 times [2022-01-31 17:19:34,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:34,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381104729] [2022-01-31 17:19:34,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:34,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:34,716 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:34,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:34,752 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:34,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:37,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:37,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:37,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381104729] [2022-01-31 17:19:37,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [381104729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:37,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:37,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:19:37,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365419637] [2022-01-31 17:19:37,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:37,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:19:37,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:37,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:19:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:19:37,153 INFO L87 Difference]: Start difference. First operand 264 states and 271 transitions. Second operand has 109 states, 109 states have (on average 2.229357798165138) internal successors, (243), 108 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:39,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:39,908 INFO L93 Difference]: Finished difference Result 314 states and 328 transitions. [2022-01-31 17:19:39,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:19:39,908 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.229357798165138) internal successors, (243), 108 states have internal predecessors, (243), 2 states have call successors, (3), 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 259 [2022-01-31 17:19:39,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:39,909 INFO L225 Difference]: With dead ends: 314 [2022-01-31 17:19:39,909 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 17:19:39,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:19:39,911 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 249 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:39,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 58 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:39,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 17:19:39,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 266. [2022-01-31 17:19:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 260 states have (on average 1.0307692307692307) internal successors, (268), 260 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 17:19:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 273 transitions. [2022-01-31 17:19:39,978 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 273 transitions. Word has length 259 [2022-01-31 17:19:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:39,978 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 273 transitions. [2022-01-31 17:19:39,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.229357798165138) internal successors, (243), 108 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:39,978 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 273 transitions. [2022-01-31 17:19:39,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 17:19:39,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:39,979 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:39,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:19:39,979 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:39,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1929584885, now seen corresponding path program 106 times [2022-01-31 17:19:39,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:39,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2002329095] [2022-01-31 17:19:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:39,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:39,980 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:39,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:40,000 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:40,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:42,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:42,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:42,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2002329095] [2022-01-31 17:19:42,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2002329095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:42,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:42,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:19:42,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856473140] [2022-01-31 17:19:42,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:42,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:19:42,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:42,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:19:42,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:19:42,298 INFO L87 Difference]: Start difference. First operand 266 states and 273 transitions. Second operand has 110 states, 110 states have (on average 2.227272727272727) internal successors, (245), 109 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:45,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:45,128 INFO L93 Difference]: Finished difference Result 316 states and 330 transitions. [2022-01-31 17:19:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:19:45,129 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.227272727272727) internal successors, (245), 109 states have internal predecessors, (245), 2 states have call successors, (3), 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 261 [2022-01-31 17:19:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:45,129 INFO L225 Difference]: With dead ends: 316 [2022-01-31 17:19:45,129 INFO L226 Difference]: Without dead ends: 269 [2022-01-31 17:19:45,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:19:45,132 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 251 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:45,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 58 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:45,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-01-31 17:19:45,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-01-31 17:19:45,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.0305343511450382) internal successors, (270), 262 states have internal predecessors, (270), 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 17:19:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 275 transitions. [2022-01-31 17:19:45,200 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 275 transitions. Word has length 261 [2022-01-31 17:19:45,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:45,201 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 275 transitions. [2022-01-31 17:19:45,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.227272727272727) internal successors, (245), 109 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:45,201 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 275 transitions. [2022-01-31 17:19:45,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 17:19:45,201 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:45,201 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:45,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:19:45,202 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:45,202 INFO L85 PathProgramCache]: Analyzing trace with hash -745518295, now seen corresponding path program 107 times [2022-01-31 17:19:45,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:45,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981583411] [2022-01-31 17:19:45,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:45,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:45,203 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:45,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:45,222 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:45,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:49,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:49,032 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:49,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981583411] [2022-01-31 17:19:49,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981583411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:49,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:49,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:19:49,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078295420] [2022-01-31 17:19:49,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:49,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:19:49,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:19:49,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:19:49,036 INFO L87 Difference]: Start difference. First operand 268 states and 275 transitions. Second operand has 111 states, 111 states have (on average 2.225225225225225) internal successors, (247), 110 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:52,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:52,276 INFO L93 Difference]: Finished difference Result 318 states and 332 transitions. [2022-01-31 17:19:52,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:19:52,276 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.225225225225225) internal successors, (247), 110 states have internal predecessors, (247), 2 states have call successors, (3), 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 263 [2022-01-31 17:19:52,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:52,277 INFO L225 Difference]: With dead ends: 318 [2022-01-31 17:19:52,277 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 17:19:52,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:19:52,279 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 253 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:52,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 93 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:52,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 17:19:52,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2022-01-31 17:19:52,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 264 states have (on average 1.0303030303030303) internal successors, (272), 264 states have internal predecessors, (272), 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 17:19:52,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2022-01-31 17:19:52,350 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 263 [2022-01-31 17:19:52,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:52,351 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2022-01-31 17:19:52,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.225225225225225) internal successors, (247), 110 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:52,351 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2022-01-31 17:19:52,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 17:19:52,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:52,351 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:52,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:19:52,352 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:52,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1023858745, now seen corresponding path program 108 times [2022-01-31 17:19:52,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:52,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247665195] [2022-01-31 17:19:52,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:52,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:52,353 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:52,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:52,373 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:54,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:19:54,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:19:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:19:54,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:19:54,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247665195] [2022-01-31 17:19:54,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [247665195] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:19:54,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:19:54,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:19:54,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527291742] [2022-01-31 17:19:54,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:19:54,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:19:54,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:19:54,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:19:54,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:19:54,710 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand has 112 states, 112 states have (on average 2.2232142857142856) internal successors, (249), 111 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:19:57,825 INFO L93 Difference]: Finished difference Result 320 states and 334 transitions. [2022-01-31 17:19:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:19:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.2232142857142856) internal successors, (249), 111 states have internal predecessors, (249), 2 states have call successors, (3), 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 17:19:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:19:57,826 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:19:57,826 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 17:19:57,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:19:57,829 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 255 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:19:57,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 58 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:19:57,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 17:19:57,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2022-01-31 17:19:57,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.0300751879699248) internal successors, (274), 266 states have internal predecessors, (274), 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 17:19:57,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 279 transitions. [2022-01-31 17:19:57,900 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 279 transitions. Word has length 265 [2022-01-31 17:19:57,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:19:57,900 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 279 transitions. [2022-01-31 17:19:57,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.2232142857142856) internal successors, (249), 111 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:19:57,900 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 279 transitions. [2022-01-31 17:19:57,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:19:57,901 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:19:57,901 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:19:57,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:19:57,901 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:19:57,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:19:57,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2073908453, now seen corresponding path program 109 times [2022-01-31 17:19:57,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:19:57,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286222039] [2022-01-31 17:19:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:19:57,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:19:57,902 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:19:57,902 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:19:57,923 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:19:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:00,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:00,751 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 17:20:00,751 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286222039] [2022-01-31 17:20:00,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1286222039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:00,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:00,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:20:00,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437816957] [2022-01-31 17:20:00,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:00,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:20:00,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:00,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:20:00,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:20:00,754 INFO L87 Difference]: Start difference. First operand 272 states and 279 transitions. Second operand has 113 states, 113 states have (on average 2.2212389380530975) internal successors, (251), 112 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:04,531 INFO L93 Difference]: Finished difference Result 322 states and 336 transitions. [2022-01-31 17:20:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:20:04,531 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.2212389380530975) internal successors, (251), 112 states have internal predecessors, (251), 2 states have call successors, (3), 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 267 [2022-01-31 17:20:04,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:04,531 INFO L225 Difference]: With dead ends: 322 [2022-01-31 17:20:04,531 INFO L226 Difference]: Without dead ends: 275 [2022-01-31 17:20:04,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:20:04,534 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 257 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:04,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 58 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:04,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-01-31 17:20:04,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-01-31 17:20:04,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 268 states have (on average 1.0298507462686568) internal successors, (276), 268 states have internal predecessors, (276), 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 17:20:04,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 281 transitions. [2022-01-31 17:20:04,609 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 281 transitions. Word has length 267 [2022-01-31 17:20:04,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:04,609 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 281 transitions. [2022-01-31 17:20:04,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.2212389380530975) internal successors, (251), 112 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:04,610 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 281 transitions. [2022-01-31 17:20:04,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 17:20:04,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:04,610 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:04,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:20:04,610 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:04,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1679117693, now seen corresponding path program 110 times [2022-01-31 17:20:04,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:04,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758374024] [2022-01-31 17:20:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:04,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:04,612 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:04,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:04,632 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:08,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:08,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:08,188 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:08,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758374024] [2022-01-31 17:20:08,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758374024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:08,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:08,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:20:08,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805616891] [2022-01-31 17:20:08,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:08,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:20:08,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:08,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:20:08,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:20:08,191 INFO L87 Difference]: Start difference. First operand 274 states and 281 transitions. Second operand has 114 states, 114 states have (on average 2.219298245614035) internal successors, (253), 113 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:12,379 INFO L93 Difference]: Finished difference Result 324 states and 338 transitions. [2022-01-31 17:20:12,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:20:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.219298245614035) internal successors, (253), 113 states have internal predecessors, (253), 2 states have call successors, (3), 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 269 [2022-01-31 17:20:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:12,380 INFO L225 Difference]: With dead ends: 324 [2022-01-31 17:20:12,380 INFO L226 Difference]: Without dead ends: 277 [2022-01-31 17:20:12,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:20:12,383 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:12,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 73 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:20:12,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-01-31 17:20:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 276. [2022-01-31 17:20:12,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.0296296296296297) internal successors, (278), 270 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 17:20:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 283 transitions. [2022-01-31 17:20:12,499 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 283 transitions. Word has length 269 [2022-01-31 17:20:12,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:12,500 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 283 transitions. [2022-01-31 17:20:12,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.219298245614035) internal successors, (253), 113 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:12,500 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 283 transitions. [2022-01-31 17:20:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 17:20:12,500 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:12,500 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:12,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:20:12,501 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:12,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:12,501 INFO L85 PathProgramCache]: Analyzing trace with hash -564715359, now seen corresponding path program 111 times [2022-01-31 17:20:12,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:12,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [50747788] [2022-01-31 17:20:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:12,502 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:12,502 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:12,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:12,523 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:15,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:15,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:15,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [50747788] [2022-01-31 17:20:15,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [50747788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:15,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:15,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:20:15,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273450146] [2022-01-31 17:20:15,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:15,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:20:15,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:15,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:20:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:20:15,374 INFO L87 Difference]: Start difference. First operand 276 states and 283 transitions. Second operand has 115 states, 115 states have (on average 2.217391304347826) internal successors, (255), 114 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:18,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:18,452 INFO L93 Difference]: Finished difference Result 326 states and 340 transitions. [2022-01-31 17:20:18,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:20:18,452 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.217391304347826) internal successors, (255), 114 states have internal predecessors, (255), 2 states have call successors, (3), 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 271 [2022-01-31 17:20:18,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:18,453 INFO L225 Difference]: With dead ends: 326 [2022-01-31 17:20:18,453 INFO L226 Difference]: Without dead ends: 279 [2022-01-31 17:20:18,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:20:18,456 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 261 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:18,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 88 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:18,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-01-31 17:20:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2022-01-31 17:20:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 272 states have (on average 1.0294117647058822) internal successors, (280), 272 states have internal predecessors, (280), 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 17:20:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 285 transitions. [2022-01-31 17:20:18,530 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 285 transitions. Word has length 271 [2022-01-31 17:20:18,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:18,531 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 285 transitions. [2022-01-31 17:20:18,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.217391304347826) internal successors, (255), 114 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 285 transitions. [2022-01-31 17:20:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 17:20:18,532 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:18,532 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:18,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:20:18,532 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:18,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:18,533 INFO L85 PathProgramCache]: Analyzing trace with hash 929070911, now seen corresponding path program 112 times [2022-01-31 17:20:18,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:18,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21080250] [2022-01-31 17:20:18,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:18,534 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:18,534 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:18,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:18,554 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:18,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:21,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:21,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21080250] [2022-01-31 17:20:21,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [21080250] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:21,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:21,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:20:21,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902586718] [2022-01-31 17:20:21,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:21,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:20:21,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:21,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:20:21,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:20:21,408 INFO L87 Difference]: Start difference. First operand 278 states and 285 transitions. Second operand has 116 states, 116 states have (on average 2.2155172413793105) internal successors, (257), 115 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:25,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:25,282 INFO L93 Difference]: Finished difference Result 328 states and 342 transitions. [2022-01-31 17:20:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:20:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.2155172413793105) internal successors, (257), 115 states have internal predecessors, (257), 2 states have call successors, (3), 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 273 [2022-01-31 17:20:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:25,283 INFO L225 Difference]: With dead ends: 328 [2022-01-31 17:20:25,283 INFO L226 Difference]: Without dead ends: 281 [2022-01-31 17:20:25,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:20:25,286 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 263 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:25,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 68 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:20:25,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-01-31 17:20:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2022-01-31 17:20:25,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.0291970802919708) internal successors, (282), 274 states have internal predecessors, (282), 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 17:20:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 287 transitions. [2022-01-31 17:20:25,364 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 287 transitions. Word has length 273 [2022-01-31 17:20:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:25,364 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 287 transitions. [2022-01-31 17:20:25,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.2155172413793105) internal successors, (257), 115 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 287 transitions. [2022-01-31 17:20:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:20:25,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:25,365 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:25,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:20:25,365 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:25,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:25,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1938599517, now seen corresponding path program 113 times [2022-01-31 17:20:25,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:25,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [414286685] [2022-01-31 17:20:25,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:25,367 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:25,367 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:25,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:25,390 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:29,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:29,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:29,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:29,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:29,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [414286685] [2022-01-31 17:20:29,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [414286685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:29,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:29,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:20:29,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259718984] [2022-01-31 17:20:29,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:29,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:20:29,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:29,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:20:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:20:29,628 INFO L87 Difference]: Start difference. First operand 280 states and 287 transitions. Second operand has 117 states, 117 states have (on average 2.213675213675214) internal successors, (259), 116 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:34,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:34,500 INFO L93 Difference]: Finished difference Result 330 states and 344 transitions. [2022-01-31 17:20:34,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:20:34,501 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.213675213675214) internal successors, (259), 116 states have internal predecessors, (259), 2 states have call successors, (3), 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 17:20:34,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:34,501 INFO L225 Difference]: With dead ends: 330 [2022-01-31 17:20:34,501 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 17:20:34,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:20:34,504 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 265 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:34,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 73 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:20:34,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 17:20:34,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 282. [2022-01-31 17:20:34,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 276 states have (on average 1.0289855072463767) internal successors, (284), 276 states have internal predecessors, (284), 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 17:20:34,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 289 transitions. [2022-01-31 17:20:34,582 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 289 transitions. Word has length 275 [2022-01-31 17:20:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:34,582 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 289 transitions. [2022-01-31 17:20:34,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.213675213675214) internal successors, (259), 116 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 289 transitions. [2022-01-31 17:20:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 17:20:34,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:34,583 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:34,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:20:34,583 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:34,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:34,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1432980987, now seen corresponding path program 114 times [2022-01-31 17:20:34,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:34,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968814184] [2022-01-31 17:20:34,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:34,584 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:34,585 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:34,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:34,606 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:38,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:38,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:38,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:38,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:38,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968814184] [2022-01-31 17:20:38,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968814184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:38,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:38,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:20:38,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143344396] [2022-01-31 17:20:38,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:38,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:20:38,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:38,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:20:38,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:20:38,940 INFO L87 Difference]: Start difference. First operand 282 states and 289 transitions. Second operand has 118 states, 118 states have (on average 2.211864406779661) internal successors, (261), 117 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:42,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:42,468 INFO L93 Difference]: Finished difference Result 332 states and 346 transitions. [2022-01-31 17:20:42,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:20:42,469 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.211864406779661) internal successors, (261), 117 states have internal predecessors, (261), 2 states have call successors, (3), 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 277 [2022-01-31 17:20:42,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:42,469 INFO L225 Difference]: With dead ends: 332 [2022-01-31 17:20:42,469 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 17:20:42,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:20:42,473 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 267 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:42,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 68 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:42,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 17:20:42,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2022-01-31 17:20:42,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.0287769784172662) internal successors, (286), 278 states have internal predecessors, (286), 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 17:20:42,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2022-01-31 17:20:42,584 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 277 [2022-01-31 17:20:42,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:42,584 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2022-01-31 17:20:42,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.211864406779661) internal successors, (261), 117 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:42,584 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2022-01-31 17:20:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 17:20:42,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:42,585 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:42,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:20:42,585 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:42,585 INFO L85 PathProgramCache]: Analyzing trace with hash 864878105, now seen corresponding path program 115 times [2022-01-31 17:20:42,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:42,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588115263] [2022-01-31 17:20:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:42,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:42,586 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:42,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:42,609 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:45,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:45,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:45,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588115263] [2022-01-31 17:20:45,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1588115263] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:45,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:45,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:20:45,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060017931] [2022-01-31 17:20:45,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:45,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:20:45,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:45,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:20:45,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:20:45,548 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand has 119 states, 119 states have (on average 2.2100840336134455) internal successors, (263), 118 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:48,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:48,765 INFO L93 Difference]: Finished difference Result 334 states and 348 transitions. [2022-01-31 17:20:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:20:48,765 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.2100840336134455) internal successors, (263), 118 states have internal predecessors, (263), 2 states have call successors, (3), 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 279 [2022-01-31 17:20:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:48,766 INFO L225 Difference]: With dead ends: 334 [2022-01-31 17:20:48,766 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 17:20:48,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:20:48,769 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 269 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:48,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 53 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 308 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:48,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 17:20:48,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2022-01-31 17:20:48,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 280 states have (on average 1.0285714285714285) internal successors, (288), 280 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 17:20:48,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 293 transitions. [2022-01-31 17:20:48,865 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 293 transitions. Word has length 279 [2022-01-31 17:20:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:48,866 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 293 transitions. [2022-01-31 17:20:48,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.2100840336134455) internal successors, (263), 118 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:48,866 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 293 transitions. [2022-01-31 17:20:48,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 17:20:48,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:48,866 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:48,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:20:48,866 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:48,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:48,867 INFO L85 PathProgramCache]: Analyzing trace with hash 378855095, now seen corresponding path program 116 times [2022-01-31 17:20:48,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:48,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970136193] [2022-01-31 17:20:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:48,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:48,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:48,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:48,890 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:48,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:53,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:20:53,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:20:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:20:53,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:20:53,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970136193] [2022-01-31 17:20:53,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970136193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:20:53,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:20:53,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:20:53,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309782939] [2022-01-31 17:20:53,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:20:53,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:20:53,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:20:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:20:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:20:53,210 INFO L87 Difference]: Start difference. First operand 286 states and 293 transitions. Second operand has 120 states, 120 states have (on average 2.2083333333333335) internal successors, (265), 119 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:20:57,372 INFO L93 Difference]: Finished difference Result 336 states and 350 transitions. [2022-01-31 17:20:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:20:57,372 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.2083333333333335) internal successors, (265), 119 states have internal predecessors, (265), 2 states have call successors, (3), 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 281 [2022-01-31 17:20:57,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:20:57,373 INFO L225 Difference]: With dead ends: 336 [2022-01-31 17:20:57,373 INFO L226 Difference]: Without dead ends: 289 [2022-01-31 17:20:57,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:20:57,377 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 271 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:20:57,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 53 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:20:57,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-01-31 17:20:57,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2022-01-31 17:20:57,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0283687943262412) internal successors, (290), 282 states have internal predecessors, (290), 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 17:20:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 295 transitions. [2022-01-31 17:20:57,511 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 295 transitions. Word has length 281 [2022-01-31 17:20:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:20:57,511 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 295 transitions. [2022-01-31 17:20:57,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.2083333333333335) internal successors, (265), 119 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:20:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 295 transitions. [2022-01-31 17:20:57,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:20:57,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:20:57,512 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:20:57,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:20:57,512 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:20:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:20:57,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1462177749, now seen corresponding path program 117 times [2022-01-31 17:20:57,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:20:57,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448690204] [2022-01-31 17:20:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:20:57,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:20:57,514 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:20:57,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:20:57,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:20:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:01,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:01,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:01,308 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:01,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448690204] [2022-01-31 17:21:01,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1448690204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:01,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:01,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:21:01,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364850835] [2022-01-31 17:21:01,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:01,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:21:01,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:01,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:21:01,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:21:01,311 INFO L87 Difference]: Start difference. First operand 288 states and 295 transitions. Second operand has 121 states, 121 states have (on average 2.206611570247934) internal successors, (267), 120 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:04,769 INFO L93 Difference]: Finished difference Result 338 states and 352 transitions. [2022-01-31 17:21:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:21:04,769 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.206611570247934) internal successors, (267), 120 states have internal predecessors, (267), 2 states have call successors, (3), 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 283 [2022-01-31 17:21:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:04,770 INFO L225 Difference]: With dead ends: 338 [2022-01-31 17:21:04,770 INFO L226 Difference]: Without dead ends: 291 [2022-01-31 17:21:04,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:21:04,774 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 273 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:04,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 63 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:04,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-01-31 17:21:04,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 290. [2022-01-31 17:21:04,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 284 states have (on average 1.028169014084507) internal successors, (292), 284 states have internal predecessors, (292), 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 17:21:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 297 transitions. [2022-01-31 17:21:04,856 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 297 transitions. Word has length 283 [2022-01-31 17:21:04,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:04,856 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 297 transitions. [2022-01-31 17:21:04,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.206611570247934) internal successors, (267), 120 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 297 transitions. [2022-01-31 17:21:04,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 17:21:04,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:04,857 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:04,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:21:04,857 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:04,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:04,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1141804685, now seen corresponding path program 118 times [2022-01-31 17:21:04,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:04,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331173493] [2022-01-31 17:21:04,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:04,858 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:04,858 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:04,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:04,881 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:07,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:07,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:07,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:07,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331173493] [2022-01-31 17:21:07,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331173493] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:07,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:07,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:21:07,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854223523] [2022-01-31 17:21:07,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:07,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:21:07,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:07,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:21:07,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:21:07,809 INFO L87 Difference]: Start difference. First operand 290 states and 297 transitions. Second operand has 122 states, 122 states have (on average 2.2049180327868854) internal successors, (269), 121 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:11,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:11,346 INFO L93 Difference]: Finished difference Result 340 states and 354 transitions. [2022-01-31 17:21:11,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:21:11,347 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.2049180327868854) internal successors, (269), 121 states have internal predecessors, (269), 2 states have call successors, (3), 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 17:21:11,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:11,347 INFO L225 Difference]: With dead ends: 340 [2022-01-31 17:21:11,347 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 17:21:11,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:21:11,350 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 275 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:11,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 73 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:11,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 17:21:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2022-01-31 17:21:11,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.027972027972028) internal successors, (294), 286 states have internal predecessors, (294), 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 17:21:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 299 transitions. [2022-01-31 17:21:11,438 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 299 transitions. Word has length 285 [2022-01-31 17:21:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:11,438 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 299 transitions. [2022-01-31 17:21:11,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.2049180327868854) internal successors, (269), 121 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 299 transitions. [2022-01-31 17:21:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 17:21:11,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:11,439 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:11,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:21:11,439 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:11,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:11,439 INFO L85 PathProgramCache]: Analyzing trace with hash 397009809, now seen corresponding path program 119 times [2022-01-31 17:21:11,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:11,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037914212] [2022-01-31 17:21:11,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:11,440 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:11,440 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:11,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:11,467 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:14,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:14,333 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:14,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037914212] [2022-01-31 17:21:14,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037914212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:14,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:14,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:21:14,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404143812] [2022-01-31 17:21:14,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:14,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:21:14,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:14,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:21:14,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:21:14,337 INFO L87 Difference]: Start difference. First operand 292 states and 299 transitions. Second operand has 123 states, 123 states have (on average 2.203252032520325) internal successors, (271), 122 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:18,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:18,131 INFO L93 Difference]: Finished difference Result 342 states and 356 transitions. [2022-01-31 17:21:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:21:18,131 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.203252032520325) internal successors, (271), 122 states have internal predecessors, (271), 2 states have call successors, (3), 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 287 [2022-01-31 17:21:18,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:18,132 INFO L225 Difference]: With dead ends: 342 [2022-01-31 17:21:18,132 INFO L226 Difference]: Without dead ends: 295 [2022-01-31 17:21:18,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:21:18,136 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 277 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:18,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 93 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:18,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-01-31 17:21:18,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 294. [2022-01-31 17:21:18,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 288 states have (on average 1.0277777777777777) internal successors, (296), 288 states have internal predecessors, (296), 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 17:21:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 301 transitions. [2022-01-31 17:21:18,226 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 301 transitions. Word has length 287 [2022-01-31 17:21:18,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:18,227 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 301 transitions. [2022-01-31 17:21:18,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.203252032520325) internal successors, (271), 122 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:18,227 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 301 transitions. [2022-01-31 17:21:18,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 17:21:18,227 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:18,228 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:18,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:21:18,228 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:18,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:18,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1728988719, now seen corresponding path program 120 times [2022-01-31 17:21:18,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:18,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918822559] [2022-01-31 17:21:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:18,229 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:18,229 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:18,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:18,274 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:18,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:22,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:22,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:22,375 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:22,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918822559] [2022-01-31 17:21:22,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [918822559] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:22,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:22,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:21:22,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359194658] [2022-01-31 17:21:22,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:22,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:21:22,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:22,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:21:22,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:21:22,379 INFO L87 Difference]: Start difference. First operand 294 states and 301 transitions. Second operand has 124 states, 124 states have (on average 2.2016129032258065) internal successors, (273), 123 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:26,630 INFO L93 Difference]: Finished difference Result 344 states and 358 transitions. [2022-01-31 17:21:26,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:21:26,630 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.2016129032258065) internal successors, (273), 123 states have internal predecessors, (273), 2 states have call successors, (3), 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 289 [2022-01-31 17:21:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:26,630 INFO L225 Difference]: With dead ends: 344 [2022-01-31 17:21:26,631 INFO L226 Difference]: Without dead ends: 297 [2022-01-31 17:21:26,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:21:26,633 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 279 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:26,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 88 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:26,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-01-31 17:21:26,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2022-01-31 17:21:26,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0275862068965518) internal successors, (298), 290 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 17:21:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2022-01-31 17:21:26,721 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 289 [2022-01-31 17:21:26,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:26,721 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2022-01-31 17:21:26,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.2016129032258065) internal successors, (273), 123 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:26,721 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2022-01-31 17:21:26,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:21:26,722 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:26,722 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:26,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:21:26,722 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash 1860467021, now seen corresponding path program 121 times [2022-01-31 17:21:26,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:26,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152573703] [2022-01-31 17:21:26,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:26,724 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:26,724 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:26,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:26,751 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:31,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:31,542 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:31,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152573703] [2022-01-31 17:21:31,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [152573703] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:31,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:31,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:21:31,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426322636] [2022-01-31 17:21:31,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:31,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:21:31,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:31,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:21:31,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:21:31,546 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand has 125 states, 125 states have (on average 2.2) internal successors, (275), 124 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:36,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:36,039 INFO L93 Difference]: Finished difference Result 346 states and 360 transitions. [2022-01-31 17:21:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:21:36,039 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.2) internal successors, (275), 124 states have internal predecessors, (275), 2 states have call successors, (3), 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 291 [2022-01-31 17:21:36,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:36,040 INFO L225 Difference]: With dead ends: 346 [2022-01-31 17:21:36,040 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 17:21:36,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:21:36,044 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 281 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:36,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 78 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:36,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 17:21:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2022-01-31 17:21:36,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 292 states have (on average 1.0273972602739727) internal successors, (300), 292 states have internal predecessors, (300), 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 17:21:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 305 transitions. [2022-01-31 17:21:36,168 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 305 transitions. Word has length 291 [2022-01-31 17:21:36,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:36,169 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 305 transitions. [2022-01-31 17:21:36,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.2) internal successors, (275), 124 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 305 transitions. [2022-01-31 17:21:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 17:21:36,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:36,170 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:36,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:21:36,170 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:36,170 INFO L85 PathProgramCache]: Analyzing trace with hash -637903637, now seen corresponding path program 122 times [2022-01-31 17:21:36,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:36,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369676245] [2022-01-31 17:21:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:36,172 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:36,172 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:36,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:36,207 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:39,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:39,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:39,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:39,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369676245] [2022-01-31 17:21:39,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369676245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:39,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:39,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:21:39,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201913692] [2022-01-31 17:21:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:39,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:21:39,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:21:39,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:21:39,239 INFO L87 Difference]: Start difference. First operand 298 states and 305 transitions. Second operand has 126 states, 126 states have (on average 2.1984126984126986) internal successors, (277), 125 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:43,254 INFO L93 Difference]: Finished difference Result 348 states and 362 transitions. [2022-01-31 17:21:43,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:21:43,254 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.1984126984126986) internal successors, (277), 125 states have internal predecessors, (277), 2 states have call successors, (3), 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 293 [2022-01-31 17:21:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:43,255 INFO L225 Difference]: With dead ends: 348 [2022-01-31 17:21:43,255 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 17:21:43,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:21:43,259 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 283 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:43,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 78 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:21:43,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 17:21:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 300. [2022-01-31 17:21:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.0272108843537415) internal successors, (302), 294 states have internal predecessors, (302), 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 17:21:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 307 transitions. [2022-01-31 17:21:43,357 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 307 transitions. Word has length 293 [2022-01-31 17:21:43,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:43,357 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 307 transitions. [2022-01-31 17:21:43,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.1984126984126986) internal successors, (277), 125 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:43,357 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 307 transitions. [2022-01-31 17:21:43,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 17:21:43,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:43,358 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:43,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:21:43,358 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:43,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash -685387511, now seen corresponding path program 123 times [2022-01-31 17:21:43,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:43,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142528865] [2022-01-31 17:21:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:43,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:43,360 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:43,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:43,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:43,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:48,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:48,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:48,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:48,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:48,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142528865] [2022-01-31 17:21:48,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1142528865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:48,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:48,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:21:48,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349532853] [2022-01-31 17:21:48,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:48,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:21:48,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:48,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:21:48,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:21:48,316 INFO L87 Difference]: Start difference. First operand 300 states and 307 transitions. Second operand has 127 states, 127 states have (on average 2.1968503937007875) internal successors, (279), 126 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:21:54,028 INFO L93 Difference]: Finished difference Result 350 states and 364 transitions. [2022-01-31 17:21:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:21:54,029 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.1968503937007875) internal successors, (279), 126 states have internal predecessors, (279), 2 states have call successors, (3), 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 17:21:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:21:54,030 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:21:54,030 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 17:21:54,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:21:54,033 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 285 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:21:54,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 73 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:21:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 17:21:54,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 302. [2022-01-31 17:21:54,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 296 states have (on average 1.027027027027027) internal successors, (304), 296 states have internal predecessors, (304), 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 17:21:54,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 309 transitions. [2022-01-31 17:21:54,128 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 309 transitions. Word has length 295 [2022-01-31 17:21:54,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:21:54,128 INFO L470 AbstractCegarLoop]: Abstraction has 302 states and 309 transitions. [2022-01-31 17:21:54,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.1968503937007875) internal successors, (279), 126 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:21:54,128 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 309 transitions. [2022-01-31 17:21:54,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 17:21:54,129 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:21:54,129 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:21:54,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:21:54,132 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:21:54,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:21:54,132 INFO L85 PathProgramCache]: Analyzing trace with hash 927249831, now seen corresponding path program 124 times [2022-01-31 17:21:54,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:21:54,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2129197595] [2022-01-31 17:21:54,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:21:54,135 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:21:54,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:21:54,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:21:54,168 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:21:54,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:58,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:21:58,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:21:58,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:21:58,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:21:58,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2129197595] [2022-01-31 17:21:58,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2129197595] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:21:58,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:21:58,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:21:58,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732227890] [2022-01-31 17:21:58,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:21:58,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:21:58,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:21:58,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:21:58,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:21:58,957 INFO L87 Difference]: Start difference. First operand 302 states and 309 transitions. Second operand has 128 states, 128 states have (on average 2.1953125) internal successors, (281), 127 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:03,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:03,250 INFO L93 Difference]: Finished difference Result 352 states and 366 transitions. [2022-01-31 17:22:03,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:22:03,250 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.1953125) internal successors, (281), 127 states have internal predecessors, (281), 2 states have call successors, (3), 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 297 [2022-01-31 17:22:03,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:03,251 INFO L225 Difference]: With dead ends: 352 [2022-01-31 17:22:03,251 INFO L226 Difference]: Without dead ends: 305 [2022-01-31 17:22:03,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:22:03,254 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 287 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:03,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 73 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-01-31 17:22:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 304. [2022-01-31 17:22:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.0268456375838926) internal successors, (306), 298 states have internal predecessors, (306), 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 17:22:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 311 transitions. [2022-01-31 17:22:03,356 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 311 transitions. Word has length 297 [2022-01-31 17:22:03,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:03,357 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 311 transitions. [2022-01-31 17:22:03,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.1953125) internal successors, (281), 127 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:03,357 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 311 transitions. [2022-01-31 17:22:03,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:22:03,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:03,357 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:03,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:22:03,358 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:03,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:03,358 INFO L85 PathProgramCache]: Analyzing trace with hash 188541637, now seen corresponding path program 125 times [2022-01-31 17:22:03,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:03,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [381579224] [2022-01-31 17:22:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:03,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:03,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:03,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:03,389 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:06,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:06,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:06,707 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:06,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [381579224] [2022-01-31 17:22:06,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [381579224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:06,707 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:06,707 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:22:06,707 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454005197] [2022-01-31 17:22:06,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:06,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:22:06,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:06,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:22:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:22:06,710 INFO L87 Difference]: Start difference. First operand 304 states and 311 transitions. Second operand has 129 states, 129 states have (on average 2.193798449612403) internal successors, (283), 128 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:11,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:11,565 INFO L93 Difference]: Finished difference Result 354 states and 368 transitions. [2022-01-31 17:22:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:22:11,565 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.193798449612403) internal successors, (283), 128 states have internal predecessors, (283), 2 states have call successors, (3), 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 299 [2022-01-31 17:22:11,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:11,566 INFO L225 Difference]: With dead ends: 354 [2022-01-31 17:22:11,566 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 17:22:11,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:22:11,570 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 289 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:11,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 78 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 17:22:11,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 306. [2022-01-31 17:22:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 300 states have (on average 1.0266666666666666) internal successors, (308), 300 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 17:22:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 313 transitions. [2022-01-31 17:22:11,699 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 313 transitions. Word has length 299 [2022-01-31 17:22:11,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:11,699 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 313 transitions. [2022-01-31 17:22:11,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.193798449612403) internal successors, (283), 128 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:11,700 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 313 transitions. [2022-01-31 17:22:11,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 17:22:11,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:11,700 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:11,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:22:11,700 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:11,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:11,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1040428957, now seen corresponding path program 126 times [2022-01-31 17:22:11,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:11,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000054961] [2022-01-31 17:22:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:11,702 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:11,702 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:11,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:11,729 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:15,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:15,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:15,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:15,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000054961] [2022-01-31 17:22:15,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000054961] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:15,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:15,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:22:15,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740344755] [2022-01-31 17:22:15,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:15,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:22:15,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:15,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:22:15,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:22:15,256 INFO L87 Difference]: Start difference. First operand 306 states and 313 transitions. Second operand has 130 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 129 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:19,575 INFO L93 Difference]: Finished difference Result 356 states and 370 transitions. [2022-01-31 17:22:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:22:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 129 states have internal predecessors, (285), 2 states have call successors, (3), 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 301 [2022-01-31 17:22:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:19,576 INFO L225 Difference]: With dead ends: 356 [2022-01-31 17:22:19,577 INFO L226 Difference]: Without dead ends: 309 [2022-01-31 17:22:19,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:22:19,581 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 291 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:19,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 68 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:19,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-01-31 17:22:19,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2022-01-31 17:22:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.0264900662251655) internal successors, (310), 302 states have internal predecessors, (310), 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 17:22:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 315 transitions. [2022-01-31 17:22:19,697 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 315 transitions. Word has length 301 [2022-01-31 17:22:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:19,697 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 315 transitions. [2022-01-31 17:22:19,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.1923076923076925) internal successors, (285), 129 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:19,698 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 315 transitions. [2022-01-31 17:22:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 17:22:19,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:19,698 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:19,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:22:19,698 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:19,699 INFO L85 PathProgramCache]: Analyzing trace with hash -965163391, now seen corresponding path program 127 times [2022-01-31 17:22:19,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:19,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281333458] [2022-01-31 17:22:19,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:19,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:19,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:19,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:19,738 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:23,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:23,655 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 17:22:23,655 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:23,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281333458] [2022-01-31 17:22:23,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281333458] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:23,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:23,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:22:23,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541881814] [2022-01-31 17:22:23,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:23,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:22:23,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:23,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:22:23,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:22:23,658 INFO L87 Difference]: Start difference. First operand 308 states and 315 transitions. Second operand has 131 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 130 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:28,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:28,769 INFO L93 Difference]: Finished difference Result 358 states and 372 transitions. [2022-01-31 17:22:28,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:22:28,770 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 130 states have internal predecessors, (287), 2 states have call successors, (3), 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 303 [2022-01-31 17:22:28,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:28,770 INFO L225 Difference]: With dead ends: 358 [2022-01-31 17:22:28,770 INFO L226 Difference]: Without dead ends: 311 [2022-01-31 17:22:28,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:22:28,775 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 293 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:28,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 53 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 332 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:28,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-01-31 17:22:28,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 310. [2022-01-31 17:22:28,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 304 states have (on average 1.0263157894736843) internal successors, (312), 304 states have internal predecessors, (312), 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 17:22:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 317 transitions. [2022-01-31 17:22:28,898 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 317 transitions. Word has length 303 [2022-01-31 17:22:28,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:28,898 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 317 transitions. [2022-01-31 17:22:28,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.1908396946564888) internal successors, (287), 130 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:28,898 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 317 transitions. [2022-01-31 17:22:28,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 17:22:28,899 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:28,899 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:28,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:22:28,899 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:28,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:28,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1649398497, now seen corresponding path program 128 times [2022-01-31 17:22:28,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:28,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019580735] [2022-01-31 17:22:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:28,901 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:28,901 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:28,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:28,935 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:29,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:32,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:32,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:32,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019580735] [2022-01-31 17:22:32,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1019580735] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:32,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:32,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:22:32,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464415695] [2022-01-31 17:22:32,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:32,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:22:32,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:32,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:22:32,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:22:32,343 INFO L87 Difference]: Start difference. First operand 310 states and 317 transitions. Second operand has 132 states, 132 states have (on average 2.1893939393939394) internal successors, (289), 131 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:37,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:37,000 INFO L93 Difference]: Finished difference Result 360 states and 374 transitions. [2022-01-31 17:22:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:22:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.1893939393939394) internal successors, (289), 131 states have internal predecessors, (289), 2 states have call successors, (3), 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 17:22:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:37,001 INFO L225 Difference]: With dead ends: 360 [2022-01-31 17:22:37,001 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 17:22:37,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:22:37,006 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 295 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:37,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 83 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:22:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 17:22:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2022-01-31 17:22:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.026143790849673) internal successors, (314), 306 states have internal predecessors, (314), 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 17:22:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2022-01-31 17:22:37,129 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 305 [2022-01-31 17:22:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:37,129 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2022-01-31 17:22:37,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.1893939393939394) internal successors, (289), 131 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:37,129 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2022-01-31 17:22:37,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:22:37,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:37,130 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:37,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:22:37,130 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:37,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:37,131 INFO L85 PathProgramCache]: Analyzing trace with hash -2069339075, now seen corresponding path program 129 times [2022-01-31 17:22:37,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:37,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588567398] [2022-01-31 17:22:37,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:37,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:37,132 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:37,132 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:37,175 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:37,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:40,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:40,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:40,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:22:40,915 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:40,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588567398] [2022-01-31 17:22:40,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588567398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:40,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:40,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:22:40,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519842737] [2022-01-31 17:22:40,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:40,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:22:40,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:40,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:22:40,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:22:40,918 INFO L87 Difference]: Start difference. First operand 312 states and 319 transitions. Second operand has 133 states, 133 states have (on average 2.18796992481203) internal successors, (291), 132 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:45,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:45,915 INFO L93 Difference]: Finished difference Result 362 states and 376 transitions. [2022-01-31 17:22:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:22:45,916 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.18796992481203) internal successors, (291), 132 states have internal predecessors, (291), 2 states have call successors, (3), 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 307 [2022-01-31 17:22:45,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:45,916 INFO L225 Difference]: With dead ends: 362 [2022-01-31 17:22:45,916 INFO L226 Difference]: Without dead ends: 315 [2022-01-31 17:22:45,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:22:45,920 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 297 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:45,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 58 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:45,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-01-31 17:22:46,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 314. [2022-01-31 17:22:46,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 308 states have (on average 1.025974025974026) internal successors, (316), 308 states have internal predecessors, (316), 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 17:22:46,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 321 transitions. [2022-01-31 17:22:46,026 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 321 transitions. Word has length 307 [2022-01-31 17:22:46,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:46,026 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 321 transitions. [2022-01-31 17:22:46,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.18796992481203) internal successors, (291), 132 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:46,026 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 321 transitions. [2022-01-31 17:22:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 17:22:46,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:46,027 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:46,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:22:46,027 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:46,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:46,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1905308709, now seen corresponding path program 130 times [2022-01-31 17:22:46,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:46,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538304108] [2022-01-31 17:22:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:46,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:46,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:46,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:46,073 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:49,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:22:49,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:22:49,966 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 17:22:49,966 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:22:49,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538304108] [2022-01-31 17:22:49,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1538304108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:22:49,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:22:49,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:22:49,967 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187184142] [2022-01-31 17:22:49,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:22:49,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:22:49,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:22:49,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:22:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:22:49,969 INFO L87 Difference]: Start difference. First operand 314 states and 321 transitions. Second operand has 134 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 133 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:22:54,498 INFO L93 Difference]: Finished difference Result 364 states and 378 transitions. [2022-01-31 17:22:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:22:54,499 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 133 states have internal predecessors, (293), 2 states have call successors, (3), 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 309 [2022-01-31 17:22:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:22:54,499 INFO L225 Difference]: With dead ends: 364 [2022-01-31 17:22:54,499 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 17:22:54,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:22:54,504 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 299 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:22:54,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 63 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:22:54,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 17:22:54,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 316. [2022-01-31 17:22:54,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.0258064516129033) internal successors, (318), 310 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 17:22:54,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 323 transitions. [2022-01-31 17:22:54,619 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 323 transitions. Word has length 309 [2022-01-31 17:22:54,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:22:54,619 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 323 transitions. [2022-01-31 17:22:54,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.1865671641791047) internal successors, (293), 133 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:22:54,619 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 323 transitions. [2022-01-31 17:22:54,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 17:22:54,620 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:22:54,620 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:22:54,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:22:54,620 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:22:54,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:22:54,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1109050361, now seen corresponding path program 131 times [2022-01-31 17:22:54,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:22:54,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137413001] [2022-01-31 17:22:54,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:22:54,622 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:22:54,622 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:22:54,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:22:54,666 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:22:54,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:00,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:00,358 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:00,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137413001] [2022-01-31 17:23:00,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2137413001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:00,358 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:00,358 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:23:00,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456172772] [2022-01-31 17:23:00,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:00,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:23:00,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:00,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:23:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:23:00,361 INFO L87 Difference]: Start difference. First operand 316 states and 323 transitions. Second operand has 135 states, 135 states have (on average 2.185185185185185) internal successors, (295), 134 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:07,134 INFO L93 Difference]: Finished difference Result 366 states and 380 transitions. [2022-01-31 17:23:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:23:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.185185185185185) internal successors, (295), 134 states have internal predecessors, (295), 2 states have call successors, (3), 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 311 [2022-01-31 17:23:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:07,135 INFO L225 Difference]: With dead ends: 366 [2022-01-31 17:23:07,135 INFO L226 Difference]: Without dead ends: 319 [2022-01-31 17:23:07,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:23:07,141 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 301 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:07,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 88 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:23:07,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-01-31 17:23:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 318. [2022-01-31 17:23:07,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 312 states have (on average 1.0256410256410255) internal successors, (320), 312 states have internal predecessors, (320), 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 17:23:07,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 325 transitions. [2022-01-31 17:23:07,265 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 325 transitions. Word has length 311 [2022-01-31 17:23:07,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:07,265 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 325 transitions. [2022-01-31 17:23:07,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.185185185185185) internal successors, (295), 134 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:07,265 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 325 transitions. [2022-01-31 17:23:07,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 17:23:07,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:07,266 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:07,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:23:07,266 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:07,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:07,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1194808169, now seen corresponding path program 132 times [2022-01-31 17:23:07,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:07,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127033973] [2022-01-31 17:23:07,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:07,268 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:07,268 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:07,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:07,300 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:11,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:11,190 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 17:23:11,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:11,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127033973] [2022-01-31 17:23:11,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [127033973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:11,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:11,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:23:11,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195567953] [2022-01-31 17:23:11,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:11,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:23:11,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:23:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:23:11,193 INFO L87 Difference]: Start difference. First operand 318 states and 325 transitions. Second operand has 136 states, 136 states have (on average 2.1838235294117645) internal successors, (297), 135 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:15,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:15,788 INFO L93 Difference]: Finished difference Result 368 states and 382 transitions. [2022-01-31 17:23:15,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:23:15,788 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.1838235294117645) internal successors, (297), 135 states have internal predecessors, (297), 2 states have call successors, (3), 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 313 [2022-01-31 17:23:15,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:15,789 INFO L225 Difference]: With dead ends: 368 [2022-01-31 17:23:15,789 INFO L226 Difference]: Without dead ends: 321 [2022-01-31 17:23:15,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:23:15,794 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 303 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:15,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 63 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-01-31 17:23:15,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 320. [2022-01-31 17:23:15,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.0254777070063694) internal successors, (322), 314 states have internal predecessors, (322), 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 17:23:15,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 327 transitions. [2022-01-31 17:23:15,916 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 327 transitions. Word has length 313 [2022-01-31 17:23:15,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:15,916 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 327 transitions. [2022-01-31 17:23:15,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.1838235294117645) internal successors, (297), 135 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:15,917 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 327 transitions. [2022-01-31 17:23:15,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:23:15,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:15,917 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:15,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:23:15,917 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:15,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1000269237, now seen corresponding path program 133 times [2022-01-31 17:23:15,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:15,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907265286] [2022-01-31 17:23:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:15,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:15,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:15,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:15,949 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:16,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:19,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:19,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:19,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:19,576 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:19,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907265286] [2022-01-31 17:23:19,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907265286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:19,576 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:19,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:23:19,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112724523] [2022-01-31 17:23:19,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:19,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:23:19,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:19,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:23:19,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:23:19,580 INFO L87 Difference]: Start difference. First operand 320 states and 327 transitions. Second operand has 137 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 136 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:24,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:24,359 INFO L93 Difference]: Finished difference Result 370 states and 384 transitions. [2022-01-31 17:23:24,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:23:24,359 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 136 states have internal predecessors, (299), 2 states have call successors, (3), 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 17:23:24,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:24,360 INFO L225 Difference]: With dead ends: 370 [2022-01-31 17:23:24,360 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 17:23:24,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:23:24,363 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 305 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:24,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 83 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:23:24,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 17:23:24,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 322. [2022-01-31 17:23:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 316 states have (on average 1.0253164556962024) internal successors, (324), 316 states have internal predecessors, (324), 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 17:23:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 329 transitions. [2022-01-31 17:23:24,483 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 329 transitions. Word has length 315 [2022-01-31 17:23:24,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:24,483 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 329 transitions. [2022-01-31 17:23:24,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.1824817518248176) internal successors, (299), 136 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:24,483 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 329 transitions. [2022-01-31 17:23:24,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 17:23:24,484 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:24,484 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:24,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:23:24,484 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:24,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:24,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1640714067, now seen corresponding path program 134 times [2022-01-31 17:23:24,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:24,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1088666880] [2022-01-31 17:23:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:24,486 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:24,486 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:24,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:24,518 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:24,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:28,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:28,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:28,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:28,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1088666880] [2022-01-31 17:23:28,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1088666880] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:28,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:28,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:23:28,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385321324] [2022-01-31 17:23:28,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:28,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:23:28,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:23:28,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:23:28,304 INFO L87 Difference]: Start difference. First operand 322 states and 329 transitions. Second operand has 138 states, 138 states have (on average 2.181159420289855) internal successors, (301), 137 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:33,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:33,152 INFO L93 Difference]: Finished difference Result 372 states and 386 transitions. [2022-01-31 17:23:33,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:23:33,152 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.181159420289855) internal successors, (301), 137 states have internal predecessors, (301), 2 states have call successors, (3), 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 317 [2022-01-31 17:23:33,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:33,152 INFO L225 Difference]: With dead ends: 372 [2022-01-31 17:23:33,152 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 17:23:33,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:23:33,156 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 307 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:33,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 68 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 17:23:33,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 324. [2022-01-31 17:23:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.0251572327044025) internal successors, (326), 318 states have internal predecessors, (326), 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 17:23:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 331 transitions. [2022-01-31 17:23:33,278 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 331 transitions. Word has length 317 [2022-01-31 17:23:33,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:33,279 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 331 transitions. [2022-01-31 17:23:33,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.181159420289855) internal successors, (301), 137 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:33,280 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 331 transitions. [2022-01-31 17:23:33,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 17:23:33,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:33,280 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:33,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 17:23:33,281 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:33,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:33,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1367094927, now seen corresponding path program 135 times [2022-01-31 17:23:33,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:33,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308235413] [2022-01-31 17:23:33,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:33,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:33,282 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:33,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:33,315 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:37,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:37,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:37,065 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:37,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308235413] [2022-01-31 17:23:37,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308235413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:37,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:37,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:23:37,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182894576] [2022-01-31 17:23:37,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:37,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:23:37,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:37,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:23:37,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:23:37,070 INFO L87 Difference]: Start difference. First operand 324 states and 331 transitions. Second operand has 139 states, 139 states have (on average 2.179856115107914) internal successors, (303), 138 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:41,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:41,687 INFO L93 Difference]: Finished difference Result 374 states and 388 transitions. [2022-01-31 17:23:41,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:23:41,687 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.179856115107914) internal successors, (303), 138 states have internal predecessors, (303), 2 states have call successors, (3), 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 319 [2022-01-31 17:23:41,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:41,688 INFO L225 Difference]: With dead ends: 374 [2022-01-31 17:23:41,688 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 17:23:41,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:23:41,692 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 309 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:41,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 83 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:23:41,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 17:23:41,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2022-01-31 17:23:41,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 320 states have (on average 1.025) internal successors, (328), 320 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 17:23:41,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 333 transitions. [2022-01-31 17:23:41,806 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 333 transitions. Word has length 319 [2022-01-31 17:23:41,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:41,806 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 333 transitions. [2022-01-31 17:23:41,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.179856115107914) internal successors, (303), 138 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:41,806 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 333 transitions. [2022-01-31 17:23:41,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 17:23:41,807 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:41,807 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:41,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 17:23:41,807 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:41,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:41,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1358547953, now seen corresponding path program 136 times [2022-01-31 17:23:41,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:41,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864129003] [2022-01-31 17:23:41,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:41,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:41,808 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:41,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:41,839 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:45,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:45,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:45,672 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:45,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864129003] [2022-01-31 17:23:45,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864129003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:45,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:45,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:23:45,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388727620] [2022-01-31 17:23:45,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:45,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:23:45,672 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:45,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:23:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:23:45,674 INFO L87 Difference]: Start difference. First operand 326 states and 333 transitions. Second operand has 140 states, 140 states have (on average 2.1785714285714284) internal successors, (305), 139 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:50,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:23:50,166 INFO L93 Difference]: Finished difference Result 376 states and 390 transitions. [2022-01-31 17:23:50,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 17:23:50,167 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.1785714285714284) internal successors, (305), 139 states have internal predecessors, (305), 2 states have call successors, (3), 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 321 [2022-01-31 17:23:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:23:50,167 INFO L225 Difference]: With dead ends: 376 [2022-01-31 17:23:50,167 INFO L226 Difference]: Without dead ends: 329 [2022-01-31 17:23:50,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-01-31 17:23:50,172 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 311 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:23:50,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 63 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:23:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-01-31 17:23:50,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 328. [2022-01-31 17:23:50,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0248447204968945) internal successors, (330), 322 states have internal predecessors, (330), 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 17:23:50,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 335 transitions. [2022-01-31 17:23:50,327 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 335 transitions. Word has length 321 [2022-01-31 17:23:50,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:23:50,328 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 335 transitions. [2022-01-31 17:23:50,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.1785714285714284) internal successors, (305), 139 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:23:50,328 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 335 transitions. [2022-01-31 17:23:50,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:23:50,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:23:50,329 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:23:50,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 17:23:50,329 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:23:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:23:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1734840531, now seen corresponding path program 137 times [2022-01-31 17:23:50,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:23:50,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971060073] [2022-01-31 17:23:50,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:23:50,330 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:23:50,330 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:23:50,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:23:50,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:23:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:55,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:23:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:23:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:23:55,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:23:55,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971060073] [2022-01-31 17:23:55,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [971060073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:23:55,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:23:55,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-01-31 17:23:55,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609724967] [2022-01-31 17:23:55,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:23:55,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-01-31 17:23:55,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:23:55,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-01-31 17:23:55,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:23:55,508 INFO L87 Difference]: Start difference. First operand 328 states and 335 transitions. Second operand has 141 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 140 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:00,265 INFO L93 Difference]: Finished difference Result 378 states and 392 transitions. [2022-01-31 17:24:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-01-31 17:24:00,266 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 140 states have internal predecessors, (307), 2 states have call successors, (3), 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 323 [2022-01-31 17:24:00,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:00,266 INFO L225 Difference]: With dead ends: 378 [2022-01-31 17:24:00,266 INFO L226 Difference]: Without dead ends: 331 [2022-01-31 17:24:00,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-01-31 17:24:00,270 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 313 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:00,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 93 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:24:00,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-01-31 17:24:00,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 330. [2022-01-31 17:24:00,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 324 states have (on average 1.0246913580246915) internal successors, (332), 324 states have internal predecessors, (332), 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 17:24:00,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 337 transitions. [2022-01-31 17:24:00,453 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 337 transitions. Word has length 323 [2022-01-31 17:24:00,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:00,453 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 337 transitions. [2022-01-31 17:24:00,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.1773049645390072) internal successors, (307), 140 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:00,453 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 337 transitions. [2022-01-31 17:24:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-31 17:24:00,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:00,454 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:00,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 17:24:00,454 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:00,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1720212171, now seen corresponding path program 138 times [2022-01-31 17:24:00,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:00,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842258964] [2022-01-31 17:24:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:00,455 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:00,455 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:00,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:00,493 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:05,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:05,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:05,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:05,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842258964] [2022-01-31 17:24:05,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842258964] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:05,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:05,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-01-31 17:24:05,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771044909] [2022-01-31 17:24:05,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:05,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-01-31 17:24:05,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:05,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-01-31 17:24:05,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 17:24:05,398 INFO L87 Difference]: Start difference. First operand 330 states and 337 transitions. Second operand has 142 states, 142 states have (on average 2.176056338028169) internal successors, (309), 141 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:10,225 INFO L93 Difference]: Finished difference Result 380 states and 394 transitions. [2022-01-31 17:24:10,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-01-31 17:24:10,225 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.176056338028169) internal successors, (309), 141 states have internal predecessors, (309), 2 states have call successors, (3), 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 17:24:10,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:10,226 INFO L225 Difference]: With dead ends: 380 [2022-01-31 17:24:10,226 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 17:24:10,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-01-31 17:24:10,231 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 315 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:10,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 68 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 17:24:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2022-01-31 17:24:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.0245398773006136) internal successors, (334), 326 states have internal predecessors, (334), 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 17:24:10,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 339 transitions. [2022-01-31 17:24:10,365 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 339 transitions. Word has length 325 [2022-01-31 17:24:10,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:10,365 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 339 transitions. [2022-01-31 17:24:10,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.176056338028169) internal successors, (309), 141 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:10,365 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 339 transitions. [2022-01-31 17:24:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 17:24:10,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:10,366 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:10,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 17:24:10,366 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:10,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash 2016138985, now seen corresponding path program 139 times [2022-01-31 17:24:10,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:10,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944702698] [2022-01-31 17:24:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:10,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:10,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:10,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:10,405 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:14,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:14,316 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:14,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944702698] [2022-01-31 17:24:14,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [944702698] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:14,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:14,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-01-31 17:24:14,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428155678] [2022-01-31 17:24:14,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:14,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-01-31 17:24:14,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:14,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-01-31 17:24:14,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:24:14,320 INFO L87 Difference]: Start difference. First operand 332 states and 339 transitions. Second operand has 143 states, 143 states have (on average 2.174825174825175) internal successors, (311), 142 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:19,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:19,183 INFO L93 Difference]: Finished difference Result 382 states and 396 transitions. [2022-01-31 17:24:19,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-01-31 17:24:19,184 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.174825174825175) internal successors, (311), 142 states have internal predecessors, (311), 2 states have call successors, (3), 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 327 [2022-01-31 17:24:19,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:19,184 INFO L225 Difference]: With dead ends: 382 [2022-01-31 17:24:19,184 INFO L226 Difference]: Without dead ends: 335 [2022-01-31 17:24:19,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-01-31 17:24:19,188 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 317 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:19,188 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 78 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:19,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-01-31 17:24:19,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 334. [2022-01-31 17:24:19,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 328 states have (on average 1.024390243902439) internal successors, (336), 328 states have internal predecessors, (336), 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 17:24:19,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 341 transitions. [2022-01-31 17:24:19,310 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 341 transitions. Word has length 327 [2022-01-31 17:24:19,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:19,310 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 341 transitions. [2022-01-31 17:24:19,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.174825174825175) internal successors, (311), 142 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:19,310 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 341 transitions. [2022-01-31 17:24:19,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 17:24:19,311 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:19,311 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:19,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 17:24:19,311 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:19,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:19,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1361001593, now seen corresponding path program 140 times [2022-01-31 17:24:19,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:19,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613660362] [2022-01-31 17:24:19,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:19,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:19,332 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:19,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:19,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:23,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:23,384 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:23,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613660362] [2022-01-31 17:24:23,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1613660362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:23,384 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:23,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-01-31 17:24:23,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729321645] [2022-01-31 17:24:23,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:23,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-01-31 17:24:23,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-01-31 17:24:23,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 17:24:23,389 INFO L87 Difference]: Start difference. First operand 334 states and 341 transitions. Second operand has 144 states, 144 states have (on average 2.173611111111111) internal successors, (313), 143 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:28,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:28,338 INFO L93 Difference]: Finished difference Result 384 states and 398 transitions. [2022-01-31 17:24:28,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-01-31 17:24:28,339 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.173611111111111) internal successors, (313), 143 states have internal predecessors, (313), 2 states have call successors, (3), 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 329 [2022-01-31 17:24:28,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:28,339 INFO L225 Difference]: With dead ends: 384 [2022-01-31 17:24:28,339 INFO L226 Difference]: Without dead ends: 337 [2022-01-31 17:24:28,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-01-31 17:24:28,344 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 319 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:28,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 63 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-01-31 17:24:28,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 336. [2022-01-31 17:24:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.0242424242424242) internal successors, (338), 330 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 17:24:28,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 343 transitions. [2022-01-31 17:24:28,500 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 343 transitions. Word has length 329 [2022-01-31 17:24:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:28,500 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 343 transitions. [2022-01-31 17:24:28,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.173611111111111) internal successors, (313), 143 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 343 transitions. [2022-01-31 17:24:28,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:24:28,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:28,501 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:28,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 17:24:28,501 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:28,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:28,501 INFO L85 PathProgramCache]: Analyzing trace with hash 202178725, now seen corresponding path program 141 times [2022-01-31 17:24:28,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:28,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40106935] [2022-01-31 17:24:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:28,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:28,503 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:28,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:28,539 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:28,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:32,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:32,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:32,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:32,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:32,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40106935] [2022-01-31 17:24:32,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [40106935] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:32,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:32,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-01-31 17:24:32,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471094532] [2022-01-31 17:24:32,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:32,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-01-31 17:24:32,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:32,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-01-31 17:24:32,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:24:32,355 INFO L87 Difference]: Start difference. First operand 336 states and 343 transitions. Second operand has 145 states, 145 states have (on average 2.1724137931034484) internal successors, (315), 144 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:37,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:37,286 INFO L93 Difference]: Finished difference Result 386 states and 400 transitions. [2022-01-31 17:24:37,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-01-31 17:24:37,287 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.1724137931034484) internal successors, (315), 144 states have internal predecessors, (315), 2 states have call successors, (3), 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 331 [2022-01-31 17:24:37,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:37,287 INFO L225 Difference]: With dead ends: 386 [2022-01-31 17:24:37,287 INFO L226 Difference]: Without dead ends: 339 [2022-01-31 17:24:37,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-01-31 17:24:37,291 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 321 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:37,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 68 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:37,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-01-31 17:24:37,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 338. [2022-01-31 17:24:37,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 332 states have (on average 1.0240963855421688) internal successors, (340), 332 states have internal predecessors, (340), 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 17:24:37,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 345 transitions. [2022-01-31 17:24:37,489 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 345 transitions. Word has length 331 [2022-01-31 17:24:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:37,490 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 345 transitions. [2022-01-31 17:24:37,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.1724137931034484) internal successors, (315), 144 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 345 transitions. [2022-01-31 17:24:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 17:24:37,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:37,491 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:37,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 17:24:37,491 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:37,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:37,491 INFO L85 PathProgramCache]: Analyzing trace with hash -820089277, now seen corresponding path program 142 times [2022-01-31 17:24:37,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:37,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063756054] [2022-01-31 17:24:37,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:37,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:37,492 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:37,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:37,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:37,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:41,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:41,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:41,433 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:41,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063756054] [2022-01-31 17:24:41,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063756054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:41,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:41,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 17:24:41,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97057404] [2022-01-31 17:24:41,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:41,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 17:24:41,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:41,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 17:24:41,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 17:24:41,437 INFO L87 Difference]: Start difference. First operand 338 states and 345 transitions. Second operand has 146 states, 146 states have (on average 2.171232876712329) internal successors, (317), 145 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:46,691 INFO L93 Difference]: Finished difference Result 388 states and 402 transitions. [2022-01-31 17:24:46,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-01-31 17:24:46,692 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.171232876712329) internal successors, (317), 145 states have internal predecessors, (317), 2 states have call successors, (3), 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 333 [2022-01-31 17:24:46,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:46,692 INFO L225 Difference]: With dead ends: 388 [2022-01-31 17:24:46,692 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 17:24:46,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10295 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=31320, Invalid=51912, Unknown=0, NotChecked=0, Total=83232 [2022-01-31 17:24:46,696 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 323 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:46,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 58 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:24:46,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 17:24:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2022-01-31 17:24:46,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.0239520958083832) internal successors, (342), 334 states have internal predecessors, (342), 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 17:24:46,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 347 transitions. [2022-01-31 17:24:46,821 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 347 transitions. Word has length 333 [2022-01-31 17:24:46,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:46,821 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 347 transitions. [2022-01-31 17:24:46,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.171232876712329) internal successors, (317), 145 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 347 transitions. [2022-01-31 17:24:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 17:24:46,822 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:46,823 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:46,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 17:24:46,823 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:46,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:46,823 INFO L85 PathProgramCache]: Analyzing trace with hash 327871585, now seen corresponding path program 143 times [2022-01-31 17:24:46,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:46,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412555246] [2022-01-31 17:24:46,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:46,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:46,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:46,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:46,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:46,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:50,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:24:50,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:24:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:24:50,927 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:24:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412555246] [2022-01-31 17:24:50,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412555246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:24:50,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:24:50,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-01-31 17:24:50,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286533655] [2022-01-31 17:24:50,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:24:50,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-01-31 17:24:50,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:24:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-01-31 17:24:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:24:50,930 INFO L87 Difference]: Start difference. First operand 340 states and 347 transitions. Second operand has 147 states, 147 states have (on average 2.1700680272108843) internal successors, (319), 146 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:56,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:24:56,193 INFO L93 Difference]: Finished difference Result 390 states and 404 transitions. [2022-01-31 17:24:56,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-01-31 17:24:56,193 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.1700680272108843) internal successors, (319), 146 states have internal predecessors, (319), 2 states have call successors, (3), 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 17:24:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:24:56,194 INFO L225 Difference]: With dead ends: 390 [2022-01-31 17:24:56,194 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 17:24:56,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10439 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=31755, Invalid=52635, Unknown=0, NotChecked=0, Total=84390 [2022-01-31 17:24:56,197 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 325 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:24:56,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 73 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:24:56,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 17:24:56,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 342. [2022-01-31 17:24:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 336 states have (on average 1.0238095238095237) internal successors, (344), 336 states have internal predecessors, (344), 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 17:24:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 349 transitions. [2022-01-31 17:24:56,323 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 349 transitions. Word has length 335 [2022-01-31 17:24:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:24:56,323 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 349 transitions. [2022-01-31 17:24:56,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.1700680272108843) internal successors, (319), 146 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:24:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 349 transitions. [2022-01-31 17:24:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-01-31 17:24:56,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:24:56,324 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:24:56,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 17:24:56,324 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:24:56,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:24:56,324 INFO L85 PathProgramCache]: Analyzing trace with hash -288335105, now seen corresponding path program 144 times [2022-01-31 17:24:56,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:24:56,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567378548] [2022-01-31 17:24:56,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:24:56,325 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:24:56,325 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:24:56,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:24:56,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:24:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:00,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:00,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:00,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:00,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567378548] [2022-01-31 17:25:00,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [567378548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:00,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:00,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-01-31 17:25:00,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636048379] [2022-01-31 17:25:00,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:00,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-01-31 17:25:00,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:00,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-01-31 17:25:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 17:25:00,428 INFO L87 Difference]: Start difference. First operand 342 states and 349 transitions. Second operand has 148 states, 148 states have (on average 2.168918918918919) internal successors, (321), 147 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:05,526 INFO L93 Difference]: Finished difference Result 392 states and 406 transitions. [2022-01-31 17:25:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-01-31 17:25:05,526 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.168918918918919) internal successors, (321), 147 states have internal predecessors, (321), 2 states have call successors, (3), 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 337 [2022-01-31 17:25:05,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:05,527 INFO L225 Difference]: With dead ends: 392 [2022-01-31 17:25:05,527 INFO L226 Difference]: Without dead ends: 345 [2022-01-31 17:25:05,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10584 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=32193, Invalid=53363, Unknown=0, NotChecked=0, Total=85556 [2022-01-31 17:25:05,531 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 327 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:05,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 48 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:05,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-01-31 17:25:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 344. [2022-01-31 17:25:05,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.0236686390532543) internal successors, (346), 338 states have internal predecessors, (346), 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 17:25:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 351 transitions. [2022-01-31 17:25:05,658 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 351 transitions. Word has length 337 [2022-01-31 17:25:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:05,658 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 351 transitions. [2022-01-31 17:25:05,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.168918918918919) internal successors, (321), 147 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 351 transitions. [2022-01-31 17:25:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:25:05,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:05,659 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:05,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 17:25:05,660 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:05,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:05,660 INFO L85 PathProgramCache]: Analyzing trace with hash 242522653, now seen corresponding path program 145 times [2022-01-31 17:25:05,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:05,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907223387] [2022-01-31 17:25:05,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:05,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:05,661 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:05,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:05,712 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:11,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:11,711 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 17:25:11,711 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:11,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907223387] [2022-01-31 17:25:11,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [907223387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:11,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:11,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-01-31 17:25:11,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299513709] [2022-01-31 17:25:11,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:11,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-01-31 17:25:11,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:11,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-01-31 17:25:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:25:11,715 INFO L87 Difference]: Start difference. First operand 344 states and 351 transitions. Second operand has 149 states, 149 states have (on average 2.1677852348993287) internal successors, (323), 148 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:17,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:17,980 INFO L93 Difference]: Finished difference Result 394 states and 408 transitions. [2022-01-31 17:25:17,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 17:25:17,981 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.1677852348993287) internal successors, (323), 148 states have internal predecessors, (323), 2 states have call successors, (3), 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 339 [2022-01-31 17:25:17,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:17,981 INFO L225 Difference]: With dead ends: 394 [2022-01-31 17:25:17,981 INFO L226 Difference]: Without dead ends: 347 [2022-01-31 17:25:17,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10730 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=32634, Invalid=54096, Unknown=0, NotChecked=0, Total=86730 [2022-01-31 17:25:17,986 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 329 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:17,986 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 63 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:25:17,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-31 17:25:18,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 346. [2022-01-31 17:25:18,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 340 states have (on average 1.0235294117647058) internal successors, (348), 340 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 17:25:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 353 transitions. [2022-01-31 17:25:18,133 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 353 transitions. Word has length 339 [2022-01-31 17:25:18,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:18,134 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 353 transitions. [2022-01-31 17:25:18,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.1677852348993287) internal successors, (323), 148 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:18,134 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 353 transitions. [2022-01-31 17:25:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 17:25:18,134 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:18,135 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:18,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 17:25:18,135 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:18,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash -704280133, now seen corresponding path program 146 times [2022-01-31 17:25:18,135 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:18,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524063996] [2022-01-31 17:25:18,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:18,136 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:18,136 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:18,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:18,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:22,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:22,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:22,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:22,349 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:22,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524063996] [2022-01-31 17:25:22,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [524063996] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:22,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:22,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-01-31 17:25:22,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486862188] [2022-01-31 17:25:22,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:22,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-01-31 17:25:22,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:22,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-01-31 17:25:22,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 17:25:22,353 INFO L87 Difference]: Start difference. First operand 346 states and 353 transitions. Second operand has 150 states, 150 states have (on average 2.1666666666666665) internal successors, (325), 149 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:27,612 INFO L93 Difference]: Finished difference Result 396 states and 410 transitions. [2022-01-31 17:25:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-01-31 17:25:27,612 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.1666666666666665) internal successors, (325), 149 states have internal predecessors, (325), 2 states have call successors, (3), 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 341 [2022-01-31 17:25:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:27,613 INFO L225 Difference]: With dead ends: 396 [2022-01-31 17:25:27,613 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 17:25:27,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10877 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=33078, Invalid=54834, Unknown=0, NotChecked=0, Total=87912 [2022-01-31 17:25:27,617 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 331 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:27,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 68 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 17:25:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 348. [2022-01-31 17:25:27,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 342 states have (on average 1.023391812865497) internal successors, (350), 342 states have internal predecessors, (350), 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 17:25:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 355 transitions. [2022-01-31 17:25:27,747 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 355 transitions. Word has length 341 [2022-01-31 17:25:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:27,747 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 355 transitions. [2022-01-31 17:25:27,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.1666666666666665) internal successors, (325), 149 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 355 transitions. [2022-01-31 17:25:27,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 17:25:27,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:27,748 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:27,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 17:25:27,748 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:27,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:27,749 INFO L85 PathProgramCache]: Analyzing trace with hash -48690727, now seen corresponding path program 147 times [2022-01-31 17:25:27,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:27,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351511549] [2022-01-31 17:25:27,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:27,750 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:27,750 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:27,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:27,785 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:27,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:32,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:32,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:32,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:32,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:32,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351511549] [2022-01-31 17:25:32,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1351511549] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:32,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:32,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-01-31 17:25:32,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753335538] [2022-01-31 17:25:32,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:32,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-01-31 17:25:32,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:32,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-01-31 17:25:32,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:25:32,011 INFO L87 Difference]: Start difference. First operand 348 states and 355 transitions. Second operand has 151 states, 151 states have (on average 2.165562913907285) internal successors, (327), 150 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:37,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:37,521 INFO L93 Difference]: Finished difference Result 398 states and 412 transitions. [2022-01-31 17:25:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-01-31 17:25:37,521 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.165562913907285) internal successors, (327), 150 states have internal predecessors, (327), 2 states have call successors, (3), 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 343 [2022-01-31 17:25:37,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:37,522 INFO L225 Difference]: With dead ends: 398 [2022-01-31 17:25:37,522 INFO L226 Difference]: Without dead ends: 351 [2022-01-31 17:25:37,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11025 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2022-01-31 17:25:37,526 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 333 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:37,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 63 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:25:37,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-31 17:25:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 350. [2022-01-31 17:25:37,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 344 states have (on average 1.0232558139534884) internal successors, (352), 344 states have internal predecessors, (352), 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 17:25:37,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 357 transitions. [2022-01-31 17:25:37,656 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 357 transitions. Word has length 343 [2022-01-31 17:25:37,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:37,656 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 357 transitions. [2022-01-31 17:25:37,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.165562913907285) internal successors, (327), 150 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:37,656 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 357 transitions. [2022-01-31 17:25:37,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 17:25:37,657 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:37,657 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:37,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 17:25:37,657 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:37,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:37,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1387464073, now seen corresponding path program 148 times [2022-01-31 17:25:37,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:37,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944775084] [2022-01-31 17:25:37,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:37,659 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:37,659 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:37,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:37,705 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:42,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:42,502 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:42,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944775084] [2022-01-31 17:25:42,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [944775084] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:42,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:42,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-01-31 17:25:42,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063861974] [2022-01-31 17:25:42,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:42,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-01-31 17:25:42,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-01-31 17:25:42,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 17:25:42,506 INFO L87 Difference]: Start difference. First operand 350 states and 357 transitions. Second operand has 152 states, 152 states have (on average 2.164473684210526) internal successors, (329), 151 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:48,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:25:48,100 INFO L93 Difference]: Finished difference Result 400 states and 414 transitions. [2022-01-31 17:25:48,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-01-31 17:25:48,101 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.164473684210526) internal successors, (329), 151 states have internal predecessors, (329), 2 states have call successors, (3), 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 17:25:48,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:25:48,102 INFO L225 Difference]: With dead ends: 400 [2022-01-31 17:25:48,102 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 17:25:48,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=33975, Invalid=56325, Unknown=0, NotChecked=0, Total=90300 [2022-01-31 17:25:48,106 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 335 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:25:48,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 58 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:25:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 17:25:48,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 352. [2022-01-31 17:25:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.023121387283237) internal successors, (354), 346 states have internal predecessors, (354), 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 17:25:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 359 transitions. [2022-01-31 17:25:48,237 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 359 transitions. Word has length 345 [2022-01-31 17:25:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:25:48,237 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 359 transitions. [2022-01-31 17:25:48,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.164473684210526) internal successors, (329), 151 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:25:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 359 transitions. [2022-01-31 17:25:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:25:48,238 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:25:48,238 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:25:48,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 17:25:48,238 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:25:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:25:48,238 INFO L85 PathProgramCache]: Analyzing trace with hash 541539221, now seen corresponding path program 149 times [2022-01-31 17:25:48,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:25:48,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296277788] [2022-01-31 17:25:48,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:25:48,240 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:25:48,240 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:25:48,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:25:48,282 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:25:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:25:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:25:53,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:25:53,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:25:53,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296277788] [2022-01-31 17:25:53,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [296277788] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:25:53,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:25:53,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-01-31 17:25:53,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190342014] [2022-01-31 17:25:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:25:53,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-01-31 17:25:53,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:25:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-01-31 17:25:53,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:25:53,244 INFO L87 Difference]: Start difference. First operand 352 states and 359 transitions. Second operand has 153 states, 153 states have (on average 2.1633986928104574) internal successors, (331), 152 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:00,188 INFO L93 Difference]: Finished difference Result 402 states and 416 transitions. [2022-01-31 17:26:00,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-01-31 17:26:00,188 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.1633986928104574) internal successors, (331), 152 states have internal predecessors, (331), 2 states have call successors, (3), 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 347 [2022-01-31 17:26:00,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:00,189 INFO L225 Difference]: With dead ends: 402 [2022-01-31 17:26:00,189 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 17:26:00,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11324 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=34428, Invalid=57078, Unknown=0, NotChecked=0, Total=91506 [2022-01-31 17:26:00,194 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 337 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:00,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 63 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 17:26:00,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2022-01-31 17:26:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 348 states have (on average 1.0229885057471264) internal successors, (356), 348 states have internal predecessors, (356), 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 17:26:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 361 transitions. [2022-01-31 17:26:00,359 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 361 transitions. Word has length 347 [2022-01-31 17:26:00,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:00,359 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 361 transitions. [2022-01-31 17:26:00,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.1633986928104574) internal successors, (331), 152 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:00,359 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 361 transitions. [2022-01-31 17:26:00,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-01-31 17:26:00,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:00,360 INFO L514 BasicCegarLoop]: trace histogram [150, 150, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:00,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 17:26:00,360 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:00,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:00,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1112167117, now seen corresponding path program 150 times [2022-01-31 17:26:00,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:00,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1028854614] [2022-01-31 17:26:00,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:00,361 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:00,361 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:00,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:00,405 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:05,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:05,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:05,610 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:05,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1028854614] [2022-01-31 17:26:05,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1028854614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:05,611 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:05,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-01-31 17:26:05,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194566482] [2022-01-31 17:26:05,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:05,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-01-31 17:26:05,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:05,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-01-31 17:26:05,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 17:26:05,614 INFO L87 Difference]: Start difference. First operand 354 states and 361 transitions. Second operand has 154 states, 154 states have (on average 2.1623376623376624) internal successors, (333), 153 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:11,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:11,221 INFO L93 Difference]: Finished difference Result 404 states and 418 transitions. [2022-01-31 17:26:11,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-01-31 17:26:11,221 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.1623376623376624) internal successors, (333), 153 states have internal predecessors, (333), 2 states have call successors, (3), 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 349 [2022-01-31 17:26:11,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:11,222 INFO L225 Difference]: With dead ends: 404 [2022-01-31 17:26:11,222 INFO L226 Difference]: Without dead ends: 357 [2022-01-31 17:26:11,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11475 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=34884, Invalid=57836, Unknown=0, NotChecked=0, Total=92720 [2022-01-31 17:26:11,226 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 339 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:11,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 68 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:11,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-01-31 17:26:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 356. [2022-01-31 17:26:11,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.022857142857143) internal successors, (358), 350 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 17:26:11,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 363 transitions. [2022-01-31 17:26:11,359 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 363 transitions. Word has length 349 [2022-01-31 17:26:11,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:11,360 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 363 transitions. [2022-01-31 17:26:11,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.1623376623376624) internal successors, (333), 153 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:11,360 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 363 transitions. [2022-01-31 17:26:11,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 17:26:11,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:11,361 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:11,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 17:26:11,361 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:11,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1186058415, now seen corresponding path program 151 times [2022-01-31 17:26:11,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:11,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934486568] [2022-01-31 17:26:11,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:11,362 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:11,362 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:11,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:11,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:11,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:15,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:15,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:15,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:15,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:15,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934486568] [2022-01-31 17:26:15,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1934486568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:15,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:15,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-01-31 17:26:15,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448765343] [2022-01-31 17:26:15,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:15,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-01-31 17:26:15,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:15,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-01-31 17:26:15,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:26:15,823 INFO L87 Difference]: Start difference. First operand 356 states and 363 transitions. Second operand has 155 states, 155 states have (on average 2.161290322580645) internal successors, (335), 154 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:21,991 INFO L93 Difference]: Finished difference Result 406 states and 420 transitions. [2022-01-31 17:26:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-01-31 17:26:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.161290322580645) internal successors, (335), 154 states have internal predecessors, (335), 2 states have call successors, (3), 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 351 [2022-01-31 17:26:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:21,992 INFO L225 Difference]: With dead ends: 406 [2022-01-31 17:26:21,992 INFO L226 Difference]: Without dead ends: 359 [2022-01-31 17:26:21,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11627 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=35343, Invalid=58599, Unknown=0, NotChecked=0, Total=93942 [2022-01-31 17:26:21,997 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 341 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:21,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 68 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-01-31 17:26:22,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 358. [2022-01-31 17:26:22,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 352 states have (on average 1.0227272727272727) internal successors, (360), 352 states have internal predecessors, (360), 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 17:26:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 365 transitions. [2022-01-31 17:26:22,145 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 365 transitions. Word has length 351 [2022-01-31 17:26:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:22,145 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 365 transitions. [2022-01-31 17:26:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.161290322580645) internal successors, (335), 154 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 365 transitions. [2022-01-31 17:26:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-31 17:26:22,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:22,146 INFO L514 BasicCegarLoop]: trace histogram [152, 152, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:22,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 17:26:22,146 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:22,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash 818848239, now seen corresponding path program 152 times [2022-01-31 17:26:22,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:22,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1843119187] [2022-01-31 17:26:22,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:22,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:22,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:22,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:22,197 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:28,979 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:28,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1843119187] [2022-01-31 17:26:28,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1843119187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:28,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:28,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 17:26:28,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850504738] [2022-01-31 17:26:28,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:28,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 17:26:28,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:28,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 17:26:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 17:26:28,982 INFO L87 Difference]: Start difference. First operand 358 states and 365 transitions. Second operand has 156 states, 156 states have (on average 2.16025641025641) internal successors, (337), 155 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:34,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:34,684 INFO L93 Difference]: Finished difference Result 408 states and 422 transitions. [2022-01-31 17:26:34,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-01-31 17:26:34,684 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.16025641025641) internal successors, (337), 155 states have internal predecessors, (337), 2 states have call successors, (3), 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 353 [2022-01-31 17:26:34,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:34,685 INFO L225 Difference]: With dead ends: 408 [2022-01-31 17:26:34,685 INFO L226 Difference]: Without dead ends: 361 [2022-01-31 17:26:34,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11780 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=35805, Invalid=59367, Unknown=0, NotChecked=0, Total=95172 [2022-01-31 17:26:34,705 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 343 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:34,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 83 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:34,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-01-31 17:26:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 360. [2022-01-31 17:26:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0225988700564972) internal successors, (362), 354 states have internal predecessors, (362), 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 17:26:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 367 transitions. [2022-01-31 17:26:34,916 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 367 transitions. Word has length 353 [2022-01-31 17:26:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 367 transitions. [2022-01-31 17:26:34,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.16025641025641) internal successors, (337), 155 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 367 transitions. [2022-01-31 17:26:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:26:34,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:34,917 INFO L514 BasicCegarLoop]: trace histogram [153, 153, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:34,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 17:26:34,917 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:34,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash -906173171, now seen corresponding path program 153 times [2022-01-31 17:26:34,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:34,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302610564] [2022-01-31 17:26:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:34,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:34,919 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:34,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:34,964 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:39,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:39,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:39,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:39,782 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:39,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302610564] [2022-01-31 17:26:39,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302610564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:39,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:39,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-01-31 17:26:39,782 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777284698] [2022-01-31 17:26:39,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:39,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-01-31 17:26:39,783 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:39,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-01-31 17:26:39,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:26:39,787 INFO L87 Difference]: Start difference. First operand 360 states and 367 transitions. Second operand has 157 states, 157 states have (on average 2.159235668789809) internal successors, (339), 156 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:46,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:46,721 INFO L93 Difference]: Finished difference Result 410 states and 424 transitions. [2022-01-31 17:26:46,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-01-31 17:26:46,721 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 2.159235668789809) internal successors, (339), 156 states have internal predecessors, (339), 2 states have call successors, (3), 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 17:26:46,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:46,722 INFO L225 Difference]: With dead ends: 410 [2022-01-31 17:26:46,722 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 17:26:46,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11934 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=36270, Invalid=60140, Unknown=0, NotChecked=0, Total=96410 [2022-01-31 17:26:46,727 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 345 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:46,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 78 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:46,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 17:26:46,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 362. [2022-01-31 17:26:46,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 356 states have (on average 1.0224719101123596) internal successors, (364), 356 states have internal predecessors, (364), 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 17:26:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 369 transitions. [2022-01-31 17:26:46,867 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 369 transitions. Word has length 355 [2022-01-31 17:26:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:46,868 INFO L470 AbstractCegarLoop]: Abstraction has 362 states and 369 transitions. [2022-01-31 17:26:46,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 2.159235668789809) internal successors, (339), 156 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 369 transitions. [2022-01-31 17:26:46,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 17:26:46,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:46,869 INFO L514 BasicCegarLoop]: trace histogram [154, 154, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:46,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 17:26:46,869 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash -794371925, now seen corresponding path program 154 times [2022-01-31 17:26:46,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:46,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347325285] [2022-01-31 17:26:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:46,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:46,892 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:46,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:46,944 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:51,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:26:51,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:26:51,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:26:51,628 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:26:51,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347325285] [2022-01-31 17:26:51,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [347325285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:26:51,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:26:51,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-01-31 17:26:51,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051435494] [2022-01-31 17:26:51,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:26:51,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-01-31 17:26:51,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:26:51,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-01-31 17:26:51,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-01-31 17:26:51,632 INFO L87 Difference]: Start difference. First operand 362 states and 369 transitions. Second operand has 158 states, 158 states have (on average 2.1582278481012658) internal successors, (341), 157 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:57,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:26:57,836 INFO L93 Difference]: Finished difference Result 412 states and 426 transitions. [2022-01-31 17:26:57,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 17:26:57,837 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.1582278481012658) internal successors, (341), 157 states have internal predecessors, (341), 2 states have call successors, (3), 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 357 [2022-01-31 17:26:57,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:26:57,837 INFO L225 Difference]: With dead ends: 412 [2022-01-31 17:26:57,837 INFO L226 Difference]: Without dead ends: 365 [2022-01-31 17:26:57,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12089 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=36738, Invalid=60918, Unknown=0, NotChecked=0, Total=97656 [2022-01-31 17:26:57,841 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 347 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:26:57,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 78 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:26:57,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-31 17:26:57,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 364. [2022-01-31 17:26:57,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.0223463687150838) internal successors, (366), 358 states have internal predecessors, (366), 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 17:26:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 371 transitions. [2022-01-31 17:26:57,984 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 371 transitions. Word has length 357 [2022-01-31 17:26:57,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:26:57,993 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 371 transitions. [2022-01-31 17:26:57,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.1582278481012658) internal successors, (341), 157 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:26:57,993 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 371 transitions. [2022-01-31 17:26:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 17:26:57,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:26:57,994 INFO L514 BasicCegarLoop]: trace histogram [155, 155, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:26:57,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 17:26:57,995 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:26:57,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:26:57,995 INFO L85 PathProgramCache]: Analyzing trace with hash -727556919, now seen corresponding path program 155 times [2022-01-31 17:26:57,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:26:57,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792311028] [2022-01-31 17:26:57,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:26:57,996 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:26:57,996 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:26:57,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:26:58,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:26:58,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:04,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:04,524 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:04,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792311028] [2022-01-31 17:27:04,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [792311028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:04,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:04,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-01-31 17:27:04,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961998686] [2022-01-31 17:27:04,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:04,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-01-31 17:27:04,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:04,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-01-31 17:27:04,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:27:04,529 INFO L87 Difference]: Start difference. First operand 364 states and 371 transitions. Second operand has 159 states, 159 states have (on average 2.157232704402516) internal successors, (343), 158 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:12,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:12,285 INFO L93 Difference]: Finished difference Result 414 states and 428 transitions. [2022-01-31 17:27:12,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-01-31 17:27:12,285 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.157232704402516) internal successors, (343), 158 states have internal predecessors, (343), 2 states have call successors, (3), 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 359 [2022-01-31 17:27:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:12,286 INFO L225 Difference]: With dead ends: 414 [2022-01-31 17:27:12,286 INFO L226 Difference]: Without dead ends: 367 [2022-01-31 17:27:12,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12245 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=37209, Invalid=61701, Unknown=0, NotChecked=0, Total=98910 [2022-01-31 17:27:12,291 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 349 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:12,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 58 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-01-31 17:27:12,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 366. [2022-01-31 17:27:12,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 360 states have (on average 1.0222222222222221) internal successors, (368), 360 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 17:27:12,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 373 transitions. [2022-01-31 17:27:12,465 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 373 transitions. Word has length 359 [2022-01-31 17:27:12,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:12,466 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 373 transitions. [2022-01-31 17:27:12,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.157232704402516) internal successors, (343), 158 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:12,466 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 373 transitions. [2022-01-31 17:27:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 17:27:12,467 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:12,467 INFO L514 BasicCegarLoop]: trace histogram [156, 156, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:12,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 17:27:12,467 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:12,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:12,467 INFO L85 PathProgramCache]: Analyzing trace with hash -942845593, now seen corresponding path program 156 times [2022-01-31 17:27:12,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:12,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019551868] [2022-01-31 17:27:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:12,469 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:12,469 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:12,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:12,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:18,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:18,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:18,353 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:18,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019551868] [2022-01-31 17:27:18,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019551868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:18,353 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:18,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-01-31 17:27:18,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408679806] [2022-01-31 17:27:18,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:18,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-01-31 17:27:18,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:18,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-01-31 17:27:18,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 17:27:18,357 INFO L87 Difference]: Start difference. First operand 366 states and 373 transitions. Second operand has 160 states, 160 states have (on average 2.15625) internal successors, (345), 159 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:25,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:25,804 INFO L93 Difference]: Finished difference Result 416 states and 430 transitions. [2022-01-31 17:27:25,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-01-31 17:27:25,804 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.15625) internal successors, (345), 159 states have internal predecessors, (345), 2 states have call successors, (3), 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 361 [2022-01-31 17:27:25,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:25,805 INFO L225 Difference]: With dead ends: 416 [2022-01-31 17:27:25,805 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 17:27:25,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12402 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=37683, Invalid=62489, Unknown=0, NotChecked=0, Total=100172 [2022-01-31 17:27:25,810 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 351 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:25,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 68 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 17:27:25,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 368. [2022-01-31 17:27:25,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.022099447513812) internal successors, (370), 362 states have internal predecessors, (370), 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 17:27:25,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 375 transitions. [2022-01-31 17:27:25,961 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 375 transitions. Word has length 361 [2022-01-31 17:27:25,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:25,962 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 375 transitions. [2022-01-31 17:27:25,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 2.15625) internal successors, (345), 159 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:25,962 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 375 transitions. [2022-01-31 17:27:25,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:27:25,963 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:25,963 INFO L514 BasicCegarLoop]: trace histogram [157, 157, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:25,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 17:27:25,963 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:25,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:25,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1676831099, now seen corresponding path program 157 times [2022-01-31 17:27:25,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:25,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [38164941] [2022-01-31 17:27:25,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:25,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:25,965 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:25,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:26,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:31,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:31,739 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:31,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [38164941] [2022-01-31 17:27:31,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [38164941] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:31,739 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:31,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-01-31 17:27:31,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200639381] [2022-01-31 17:27:31,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:31,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-01-31 17:27:31,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:31,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-01-31 17:27:31,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:27:31,742 INFO L87 Difference]: Start difference. First operand 368 states and 375 transitions. Second operand has 161 states, 161 states have (on average 2.1552795031055902) internal successors, (347), 160 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:39,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:39,838 INFO L93 Difference]: Finished difference Result 418 states and 432 transitions. [2022-01-31 17:27:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-01-31 17:27:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.1552795031055902) internal successors, (347), 160 states have internal predecessors, (347), 2 states have call successors, (3), 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 363 [2022-01-31 17:27:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:39,839 INFO L225 Difference]: With dead ends: 418 [2022-01-31 17:27:39,839 INFO L226 Difference]: Without dead ends: 371 [2022-01-31 17:27:39,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12560 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2022-01-31 17:27:39,843 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 353 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:39,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 63 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-01-31 17:27:39,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 370. [2022-01-31 17:27:39,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 364 states have (on average 1.021978021978022) internal successors, (372), 364 states have internal predecessors, (372), 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 17:27:39,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 377 transitions. [2022-01-31 17:27:39,994 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 377 transitions. Word has length 363 [2022-01-31 17:27:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:39,994 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 377 transitions. [2022-01-31 17:27:39,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.1552795031055902) internal successors, (347), 160 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:39,995 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 377 transitions. [2022-01-31 17:27:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-31 17:27:39,995 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:39,995 INFO L514 BasicCegarLoop]: trace histogram [158, 158, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:39,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 17:27:39,996 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:39,996 INFO L85 PathProgramCache]: Analyzing trace with hash 1632701475, now seen corresponding path program 158 times [2022-01-31 17:27:39,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:39,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673271550] [2022-01-31 17:27:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:39,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:39,997 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:39,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:40,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:46,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:27:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:27:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:27:46,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:27:46,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673271550] [2022-01-31 17:27:46,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673271550] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:27:46,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:27:46,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-01-31 17:27:46,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194544279] [2022-01-31 17:27:46,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:27:46,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-01-31 17:27:46,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:27:46,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-01-31 17:27:46,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 17:27:46,470 INFO L87 Difference]: Start difference. First operand 370 states and 377 transitions. Second operand has 162 states, 162 states have (on average 2.154320987654321) internal successors, (349), 161 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:27:53,206 INFO L93 Difference]: Finished difference Result 420 states and 434 transitions. [2022-01-31 17:27:53,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-01-31 17:27:53,206 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.154320987654321) internal successors, (349), 161 states have internal predecessors, (349), 2 states have call successors, (3), 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 17:27:53,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:27:53,207 INFO L225 Difference]: With dead ends: 420 [2022-01-31 17:27:53,207 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 17:27:53,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12719 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=38640, Invalid=64080, Unknown=0, NotChecked=0, Total=102720 [2022-01-31 17:27:53,212 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 355 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:27:53,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 73 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:27:53,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 17:27:53,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 372. [2022-01-31 17:27:53,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.0218579234972678) internal successors, (374), 366 states have internal predecessors, (374), 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 17:27:53,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 379 transitions. [2022-01-31 17:27:53,362 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 379 transitions. Word has length 365 [2022-01-31 17:27:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:27:53,363 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 379 transitions. [2022-01-31 17:27:53,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.154320987654321) internal successors, (349), 161 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:27:53,363 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 379 transitions. [2022-01-31 17:27:53,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 17:27:53,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:27:53,364 INFO L514 BasicCegarLoop]: trace histogram [159, 159, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:27:53,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 17:27:53,364 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:27:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:27:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash -477261247, now seen corresponding path program 159 times [2022-01-31 17:27:53,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:27:53,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831242984] [2022-01-31 17:27:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:27:53,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:27:53,365 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:27:53,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:27:53,439 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:27:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:01,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:01,073 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:01,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831242984] [2022-01-31 17:28:01,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831242984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:01,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:01,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-01-31 17:28:01,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264506542] [2022-01-31 17:28:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:01,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-01-31 17:28:01,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:01,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-01-31 17:28:01,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:28:01,077 INFO L87 Difference]: Start difference. First operand 372 states and 379 transitions. Second operand has 163 states, 163 states have (on average 2.1533742331288344) internal successors, (351), 162 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:08,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:08,604 INFO L93 Difference]: Finished difference Result 422 states and 436 transitions. [2022-01-31 17:28:08,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-01-31 17:28:08,604 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.1533742331288344) internal successors, (351), 162 states have internal predecessors, (351), 2 states have call successors, (3), 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 367 [2022-01-31 17:28:08,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:08,605 INFO L225 Difference]: With dead ends: 422 [2022-01-31 17:28:08,605 INFO L226 Difference]: Without dead ends: 375 [2022-01-31 17:28:08,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12879 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=39123, Invalid=64883, Unknown=0, NotChecked=0, Total=104006 [2022-01-31 17:28:08,637 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 357 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:08,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 68 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:28:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-01-31 17:28:08,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 374. [2022-01-31 17:28:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 368 states have (on average 1.0217391304347827) internal successors, (376), 368 states have internal predecessors, (376), 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 17:28:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 381 transitions. [2022-01-31 17:28:08,787 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 381 transitions. Word has length 367 [2022-01-31 17:28:08,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:08,787 INFO L470 AbstractCegarLoop]: Abstraction has 374 states and 381 transitions. [2022-01-31 17:28:08,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.1533742331288344) internal successors, (351), 162 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:08,787 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 381 transitions. [2022-01-31 17:28:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 17:28:08,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:08,788 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:08,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 17:28:08,788 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:08,789 INFO L85 PathProgramCache]: Analyzing trace with hash -926873377, now seen corresponding path program 160 times [2022-01-31 17:28:08,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:08,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609410209] [2022-01-31 17:28:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:08,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:08,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:08,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:08,892 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:09,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:15,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:15,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:15,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:15,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:15,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609410209] [2022-01-31 17:28:15,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [609410209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:15,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:15,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-01-31 17:28:15,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713985873] [2022-01-31 17:28:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:15,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 17:28:15,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:15,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 17:28:15,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 17:28:15,391 INFO L87 Difference]: Start difference. First operand 374 states and 381 transitions. Second operand has 164 states, 164 states have (on average 2.152439024390244) internal successors, (353), 163 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:23,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:23,832 INFO L93 Difference]: Finished difference Result 424 states and 438 transitions. [2022-01-31 17:28:23,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-01-31 17:28:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.152439024390244) internal successors, (353), 163 states have internal predecessors, (353), 2 states have call successors, (3), 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 369 [2022-01-31 17:28:23,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:23,833 INFO L225 Difference]: With dead ends: 424 [2022-01-31 17:28:23,834 INFO L226 Difference]: Without dead ends: 377 [2022-01-31 17:28:23,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13040 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=39609, Invalid=65691, Unknown=0, NotChecked=0, Total=105300 [2022-01-31 17:28:23,841 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 359 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:23,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 68 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:28:23,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2022-01-31 17:28:24,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2022-01-31 17:28:24,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.0216216216216216) internal successors, (378), 370 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 17:28:24,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 383 transitions. [2022-01-31 17:28:24,016 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 383 transitions. Word has length 369 [2022-01-31 17:28:24,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:24,017 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 383 transitions. [2022-01-31 17:28:24,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.152439024390244) internal successors, (353), 163 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:24,017 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 383 transitions. [2022-01-31 17:28:24,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:28:24,018 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:24,018 INFO L514 BasicCegarLoop]: trace histogram [161, 161, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:24,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 17:28:24,018 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:24,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:24,018 INFO L85 PathProgramCache]: Analyzing trace with hash 787566589, now seen corresponding path program 161 times [2022-01-31 17:28:24,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:24,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955123789] [2022-01-31 17:28:24,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:24,019 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:24,019 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:24,020 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:24,076 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:30,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:30,756 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 17:28:30,756 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:30,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955123789] [2022-01-31 17:28:30,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [955123789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:30,756 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:30,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-01-31 17:28:30,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960635171] [2022-01-31 17:28:30,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:30,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-01-31 17:28:30,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-01-31 17:28:30,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:28:30,760 INFO L87 Difference]: Start difference. First operand 376 states and 383 transitions. Second operand has 165 states, 165 states have (on average 2.1515151515151514) internal successors, (355), 164 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:37,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:37,527 INFO L93 Difference]: Finished difference Result 426 states and 440 transitions. [2022-01-31 17:28:37,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-01-31 17:28:37,528 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.1515151515151514) internal successors, (355), 164 states have internal predecessors, (355), 2 states have call successors, (3), 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 371 [2022-01-31 17:28:37,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:37,547 INFO L225 Difference]: With dead ends: 426 [2022-01-31 17:28:37,547 INFO L226 Difference]: Without dead ends: 379 [2022-01-31 17:28:37,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13202 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=40098, Invalid=66504, Unknown=0, NotChecked=0, Total=106602 [2022-01-31 17:28:37,552 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 361 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:37,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 68 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:28:37,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-01-31 17:28:37,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 378. [2022-01-31 17:28:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 372 states have (on average 1.021505376344086) internal successors, (380), 372 states have internal predecessors, (380), 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 17:28:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 385 transitions. [2022-01-31 17:28:37,709 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 385 transitions. Word has length 371 [2022-01-31 17:28:37,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:37,709 INFO L470 AbstractCegarLoop]: Abstraction has 378 states and 385 transitions. [2022-01-31 17:28:37,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.1515151515151514) internal successors, (355), 164 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:37,709 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 385 transitions. [2022-01-31 17:28:37,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-01-31 17:28:37,710 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:37,710 INFO L514 BasicCegarLoop]: trace histogram [162, 162, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:37,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 17:28:37,710 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:37,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:37,710 INFO L85 PathProgramCache]: Analyzing trace with hash -903067749, now seen corresponding path program 162 times [2022-01-31 17:28:37,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:37,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1270433851] [2022-01-31 17:28:37,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:37,711 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:37,711 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:37,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:37,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:37,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:28:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:28:45,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:28:45,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:28:45,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1270433851] [2022-01-31 17:28:45,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1270433851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:28:45,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:28:45,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-01-31 17:28:45,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826901412] [2022-01-31 17:28:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:28:45,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-01-31 17:28:45,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:28:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-01-31 17:28:45,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 17:28:45,563 INFO L87 Difference]: Start difference. First operand 378 states and 385 transitions. Second operand has 166 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 165 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:52,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:28:52,705 INFO L93 Difference]: Finished difference Result 428 states and 442 transitions. [2022-01-31 17:28:52,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-01-31 17:28:52,706 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 165 states have internal predecessors, (357), 2 states have call successors, (3), 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 373 [2022-01-31 17:28:52,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:28:52,706 INFO L225 Difference]: With dead ends: 428 [2022-01-31 17:28:52,706 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 17:28:52,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13365 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=40590, Invalid=67322, Unknown=0, NotChecked=0, Total=107912 [2022-01-31 17:28:52,713 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 363 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:28:52,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 83 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:28:52,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 17:28:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 380. [2022-01-31 17:28:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 374 states have (on average 1.0213903743315509) internal successors, (382), 374 states have internal predecessors, (382), 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 17:28:52,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 387 transitions. [2022-01-31 17:28:52,933 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 387 transitions. Word has length 373 [2022-01-31 17:28:52,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:28:52,933 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 387 transitions. [2022-01-31 17:28:52,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 2.1506024096385543) internal successors, (357), 165 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:28:52,934 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 387 transitions. [2022-01-31 17:28:52,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2022-01-31 17:28:52,935 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:28:52,935 INFO L514 BasicCegarLoop]: trace histogram [163, 163, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:28:52,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-01-31 17:28:52,935 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:28:52,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:28:52,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2105028679, now seen corresponding path program 163 times [2022-01-31 17:28:52,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:28:52,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215547757] [2022-01-31 17:28:52,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:28:52,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:28:52,937 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:28:52,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:28:52,993 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:28:53,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:01,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:01,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:01,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:01,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215547757] [2022-01-31 17:29:01,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [215547757] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:01,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:01,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-01-31 17:29:01,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240979103] [2022-01-31 17:29:01,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:01,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-01-31 17:29:01,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-01-31 17:29:01,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:29:01,770 INFO L87 Difference]: Start difference. First operand 380 states and 387 transitions. Second operand has 167 states, 167 states have (on average 2.1497005988023954) internal successors, (359), 166 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:11,280 INFO L93 Difference]: Finished difference Result 430 states and 444 transitions. [2022-01-31 17:29:11,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 17:29:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.1497005988023954) internal successors, (359), 166 states have internal predecessors, (359), 2 states have call successors, (3), 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 17:29:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:11,281 INFO L225 Difference]: With dead ends: 430 [2022-01-31 17:29:11,281 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 17:29:11,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13529 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=41085, Invalid=68145, Unknown=0, NotChecked=0, Total=109230 [2022-01-31 17:29:11,288 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 365 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:11,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 73 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:29:11,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 17:29:11,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2022-01-31 17:29:11,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 376 states have (on average 1.0212765957446808) internal successors, (384), 376 states have internal predecessors, (384), 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 17:29:11,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 389 transitions. [2022-01-31 17:29:11,487 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 389 transitions. Word has length 375 [2022-01-31 17:29:11,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:11,487 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 389 transitions. [2022-01-31 17:29:11,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.1497005988023954) internal successors, (359), 166 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:11,487 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 389 transitions. [2022-01-31 17:29:11,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-31 17:29:11,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:11,488 INFO L514 BasicCegarLoop]: trace histogram [164, 164, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:11,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-01-31 17:29:11,488 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:11,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1843279785, now seen corresponding path program 164 times [2022-01-31 17:29:11,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:11,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463941427] [2022-01-31 17:29:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:11,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:11,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:11,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:11,540 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:11,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:19,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:19,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:19,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463941427] [2022-01-31 17:29:19,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1463941427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:19,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:19,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-01-31 17:29:19,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887714296] [2022-01-31 17:29:19,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:19,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-01-31 17:29:19,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:19,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-01-31 17:29:19,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 17:29:19,367 INFO L87 Difference]: Start difference. First operand 382 states and 389 transitions. Second operand has 168 states, 168 states have (on average 2.1488095238095237) internal successors, (361), 167 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:27,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:27,989 INFO L93 Difference]: Finished difference Result 432 states and 446 transitions. [2022-01-31 17:29:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-01-31 17:29:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.1488095238095237) internal successors, (361), 167 states have internal predecessors, (361), 2 states have call successors, (3), 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 377 [2022-01-31 17:29:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:27,991 INFO L225 Difference]: With dead ends: 432 [2022-01-31 17:29:27,991 INFO L226 Difference]: Without dead ends: 385 [2022-01-31 17:29:27,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13694 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=41583, Invalid=68973, Unknown=0, NotChecked=0, Total=110556 [2022-01-31 17:29:27,998 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 367 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:27,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 98 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:29:27,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-01-31 17:29:28,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 384. [2022-01-31 17:29:28,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.0211640211640212) internal successors, (386), 378 states have internal predecessors, (386), 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 17:29:28,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 391 transitions. [2022-01-31 17:29:28,222 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 391 transitions. Word has length 377 [2022-01-31 17:29:28,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:28,222 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 391 transitions. [2022-01-31 17:29:28,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 2.1488095238095237) internal successors, (361), 167 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:28,222 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 391 transitions. [2022-01-31 17:29:28,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 17:29:28,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:28,223 INFO L514 BasicCegarLoop]: trace histogram [165, 165, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:28,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-01-31 17:29:28,223 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:28,224 INFO L85 PathProgramCache]: Analyzing trace with hash 589304181, now seen corresponding path program 165 times [2022-01-31 17:29:28,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:28,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965918174] [2022-01-31 17:29:28,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:28,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:28,231 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:28,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:28,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:34,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:34,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:34,126 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:34,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965918174] [2022-01-31 17:29:34,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965918174] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:34,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:34,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-01-31 17:29:34,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142579126] [2022-01-31 17:29:34,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:34,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-01-31 17:29:34,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-01-31 17:29:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:29:34,132 INFO L87 Difference]: Start difference. First operand 384 states and 391 transitions. Second operand has 169 states, 169 states have (on average 2.1479289940828403) internal successors, (363), 168 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:29:41,741 INFO L93 Difference]: Finished difference Result 434 states and 448 transitions. [2022-01-31 17:29:41,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-01-31 17:29:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.1479289940828403) internal successors, (363), 168 states have internal predecessors, (363), 2 states have call successors, (3), 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 379 [2022-01-31 17:29:41,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:29:41,743 INFO L225 Difference]: With dead ends: 434 [2022-01-31 17:29:41,743 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 17:29:41,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13860 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=42084, Invalid=69806, Unknown=0, NotChecked=0, Total=111890 [2022-01-31 17:29:41,805 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 369 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:29:41,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 73 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:29:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 17:29:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 386. [2022-01-31 17:29:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 380 states have (on average 1.0210526315789474) internal successors, (388), 380 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 17:29:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 393 transitions. [2022-01-31 17:29:41,984 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 393 transitions. Word has length 379 [2022-01-31 17:29:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:29:41,984 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 393 transitions. [2022-01-31 17:29:41,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.1479289940828403) internal successors, (363), 168 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:29:41,984 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 393 transitions. [2022-01-31 17:29:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 17:29:41,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:29:41,985 INFO L514 BasicCegarLoop]: trace histogram [166, 166, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:29:41,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-01-31 17:29:41,985 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:29:41,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:29:41,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1840286483, now seen corresponding path program 166 times [2022-01-31 17:29:41,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:29:41,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40676987] [2022-01-31 17:29:41,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:29:41,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:29:41,987 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:29:41,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:29:42,046 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:29:42,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:47,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:29:47,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:29:47,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:29:47,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:29:47,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40676987] [2022-01-31 17:29:47,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [40676987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:29:47,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:29:47,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-01-31 17:29:47,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693136859] [2022-01-31 17:29:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:29:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-01-31 17:29:47,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:29:48,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-01-31 17:29:48,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 17:29:48,003 INFO L87 Difference]: Start difference. First operand 386 states and 393 transitions. Second operand has 170 states, 170 states have (on average 2.1470588235294117) internal successors, (365), 169 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)