/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/loops/vogal-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:13:06,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:13:06,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:13:06,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:13:06,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:13:06,182 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:13:06,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:13:06,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:13:06,184 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:13:06,184 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:13:06,184 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:13:06,184 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:13:06,184 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:13:06,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:13:06,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:13:06,185 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:13:06,186 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:13:06,186 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:13:06,186 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:13:06,186 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:13:06,186 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:13:06,186 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:13:06,186 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:13:06,187 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:13:06,187 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:13:06,187 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:13:06,187 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:13:06,187 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:13:06,187 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:13:06,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:13:06,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:13:06,455 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:13:06,456 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:13:06,457 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:13:06,458 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-1.i [2022-02-24 01:13:06,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b68866a2/d0b0fabc142a46f8ab066974903c33ca/FLAG32d3bc41e [2022-02-24 01:13:06,930 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:13:06,931 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i [2022-02-24 01:13:06,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b68866a2/d0b0fabc142a46f8ab066974903c33ca/FLAG32d3bc41e [2022-02-24 01:13:06,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b68866a2/d0b0fabc142a46f8ab066974903c33ca [2022-02-24 01:13:06,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:13:06,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:13:06,962 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:13:06,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:13:06,965 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:13:06,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:13:06" (1/1) ... [2022-02-24 01:13:06,967 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c6f973f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:06, skipping insertion in model container [2022-02-24 01:13:06,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:13:06" (1/1) ... [2022-02-24 01:13:06,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:13:06,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:13:07,136 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-02-24 01:13:07,162 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:13:07,171 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:13:07,189 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-1.i[895,908] [2022-02-24 01:13:07,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:13:07,224 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:13:07,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07 WrapperNode [2022-02-24 01:13:07,224 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:13:07,225 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:13:07,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:13:07,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:13:07,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,235 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:13:07,256 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:13:07,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:13:07,257 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:13:07,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (1/1) ... [2022-02-24 01:13:07,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:13:07,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:13:07,288 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) [2022-02-24 01:13:07,312 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 [2022-02-24 01:13:07,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:13:07,326 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:13:07,326 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:13:07,326 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 01:13:07,327 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:13:07,327 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:13:07,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:13:07,327 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:13:07,327 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 01:13:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 01:13:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:13:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:13:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 01:13:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:13:07,329 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 01:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:13:07,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:13:07,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:13:07,415 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:13:07,417 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:13:07,576 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:13:07,581 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:13:07,581 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-24 01:13:07,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:13:07 BoogieIcfgContainer [2022-02-24 01:13:07,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:13:07,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:13:07,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:13:07,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:13:07,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:13:06" (1/3) ... [2022-02-24 01:13:07,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52684de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:13:07, skipping insertion in model container [2022-02-24 01:13:07,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:07" (2/3) ... [2022-02-24 01:13:07,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52684de4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:13:07, skipping insertion in model container [2022-02-24 01:13:07,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:13:07" (3/3) ... [2022-02-24 01:13:07,589 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-1.i [2022-02-24 01:13:07,592 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:13:07,592 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:13:07,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:13:07,632 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 [2022-02-24 01:13:07,632 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:13:07,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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) [2022-02-24 01:13:07,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:13:07,667 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:07,667 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:07,667 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:07,673 INFO L85 PathProgramCache]: Analyzing trace with hash -366742854, now seen corresponding path program 1 times [2022-02-24 01:13:07,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:07,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931773549] [2022-02-24 01:13:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:07,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:07,735 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:13:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:07,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:07,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:07,893 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931773549] [2022-02-24 01:13:07,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1931773549] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:07,894 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:07,894 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 01:13:07,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594282739] [2022-02-24 01:13:07,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:07,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 01:13:07,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:07,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 01:13:07,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:13:07,922 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:07,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:07,957 INFO L93 Difference]: Finished difference Result 66 states and 95 transitions. [2022-02-24 01:13:07,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 01:13:07,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 01:13:07,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:07,964 INFO L225 Difference]: With dead ends: 66 [2022-02-24 01:13:07,965 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 01:13:07,967 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 [2022-02-24 01:13:07,970 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 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 [2022-02-24 01:13:07,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 01:13:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 01:13:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-24 01:13:08,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 18 [2022-02-24 01:13:08,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:08,015 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-24 01:13:08,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,015 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-24 01:13:08,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:13:08,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:08,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:08,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:13:08,017 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:08,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:08,017 INFO L85 PathProgramCache]: Analyzing trace with hash -864138192, now seen corresponding path program 1 times [2022-02-24 01:13:08,018 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:08,018 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390156010] [2022-02-24 01:13:08,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:08,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:08,034 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:13:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:08,172 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:08,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390156010] [2022-02-24 01:13:08,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1390156010] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:08,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:08,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:13:08,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313710217] [2022-02-24 01:13:08,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:08,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:13:08,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:08,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:13:08,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:13:08,175 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:08,299 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-02-24 01:13:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:13:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 01:13:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:08,304 INFO L225 Difference]: With dead ends: 67 [2022-02-24 01:13:08,304 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 01:13:08,305 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 [2022-02-24 01:13:08,306 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:08,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:08,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 01:13:08,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-02-24 01:13:08,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 26 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-02-24 01:13:08,314 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 20 [2022-02-24 01:13:08,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:08,314 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-02-24 01:13:08,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,315 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-02-24 01:13:08,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:13:08,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:08,320 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:08,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:13:08,324 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash 32041234, now seen corresponding path program 1 times [2022-02-24 01:13:08,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:08,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761577459] [2022-02-24 01:13:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:08,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:08,347 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:08,348 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:08,348 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:08,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:08,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:08,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761577459] [2022-02-24 01:13:08,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761577459] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:08,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:08,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:13:08,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172356028] [2022-02-24 01:13:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:08,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:13:08,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:08,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:13:08,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:08,503 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:08,690 INFO L93 Difference]: Finished difference Result 82 states and 108 transitions. [2022-02-24 01:13:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:13:08,690 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 01:13:08,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:08,693 INFO L225 Difference]: With dead ends: 82 [2022-02-24 01:13:08,693 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 01:13:08,693 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 [2022-02-24 01:13:08,695 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 112 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:08,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 01:13:08,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 33. [2022-02-24 01:13:08,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2022-02-24 01:13:08,706 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 22 [2022-02-24 01:13:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:08,706 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2022-02-24 01:13:08,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2022-02-24 01:13:08,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:13:08,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:08,707 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] [2022-02-24 01:13:08,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:13:08,708 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:08,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:08,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2027956876, now seen corresponding path program 2 times [2022-02-24 01:13:08,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:08,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251842486] [2022-02-24 01:13:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:08,713 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:08,713 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:08,713 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:08,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:08,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251842486] [2022-02-24 01:13:08,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [251842486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:08,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:08,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:13:08,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807159225] [2022-02-24 01:13:08,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:08,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:13:08,788 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:13:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:13:08,789 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:08,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:08,998 INFO L93 Difference]: Finished difference Result 97 states and 129 transitions. [2022-02-24 01:13:08,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:13:08,998 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:13:08,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:09,001 INFO L225 Difference]: With dead ends: 97 [2022-02-24 01:13:09,001 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 01:13:09,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:09,016 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 130 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:09,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 57 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:09,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 01:13:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 35. [2022-02-24 01:13:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2022-02-24 01:13:09,029 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 24 [2022-02-24 01:13:09,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:09,029 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2022-02-24 01:13:09,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,029 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2022-02-24 01:13:09,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:13:09,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:13:09,030 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1706217130, now seen corresponding path program 3 times [2022-02-24 01:13:09,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677899366] [2022-02-24 01:13:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:09,035 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:09,035 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:09,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:09,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:09,137 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:09,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677899366] [2022-02-24 01:13:09,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1677899366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:09,137 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:09,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:09,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380148272] [2022-02-24 01:13:09,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:09,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:09,138 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:09,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:09,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:09,139 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:09,398 INFO L93 Difference]: Finished difference Result 112 states and 150 transitions. [2022-02-24 01:13:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:13:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:13:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:09,408 INFO L225 Difference]: With dead ends: 112 [2022-02-24 01:13:09,408 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 01:13:09,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:09,413 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 193 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:09,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 64 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 01:13:09,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 37. [2022-02-24 01:13:09,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-02-24 01:13:09,430 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 26 [2022-02-24 01:13:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:09,430 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-02-24 01:13:09,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-02-24 01:13:09,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:13:09,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,431 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:13:09,432 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1751966536, now seen corresponding path program 4 times [2022-02-24 01:13:09,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810466638] [2022-02-24 01:13:09,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:09,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:09,437 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:09,590 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:09,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810466638] [2022-02-24 01:13:09,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [810466638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:09,591 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:09,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:13:09,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053609405] [2022-02-24 01:13:09,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:09,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:13:09,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:09,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:13:09,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:13:09,592 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:09,948 INFO L93 Difference]: Finished difference Result 127 states and 171 transitions. [2022-02-24 01:13:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:09,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:13:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:09,950 INFO L225 Difference]: With dead ends: 127 [2022-02-24 01:13:09,950 INFO L226 Difference]: Without dead ends: 105 [2022-02-24 01:13:09,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:09,952 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 256 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:09,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 71 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:09,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-24 01:13:09,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 39. [2022-02-24 01:13:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 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), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 46 transitions. [2022-02-24 01:13:09,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 46 transitions. Word has length 28 [2022-02-24 01:13:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:09,975 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 46 transitions. [2022-02-24 01:13:09,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 46 transitions. [2022-02-24 01:13:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:13:09,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,976 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:13:09,977 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1527494554, now seen corresponding path program 5 times [2022-02-24 01:13:09,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599336573] [2022-02-24 01:13:09,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,981 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:09,981 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:09,981 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:10,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:10,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:10,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:10,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599336573] [2022-02-24 01:13:10,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [599336573] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:10,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:10,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:10,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027827648] [2022-02-24 01:13:10,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:10,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:10,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:10,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:10,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:10,109 INFO L87 Difference]: Start difference. First operand 39 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:10,253 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2022-02-24 01:13:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:13:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:13:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:10,254 INFO L225 Difference]: With dead ends: 63 [2022-02-24 01:13:10,254 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 01:13:10,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:10,261 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 77 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:10,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 58 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:10,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 01:13:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2022-02-24 01:13:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 63 transitions. [2022-02-24 01:13:10,286 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 63 transitions. Word has length 30 [2022-02-24 01:13:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:10,288 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 63 transitions. [2022-02-24 01:13:10,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 63 transitions. [2022-02-24 01:13:10,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:13:10,294 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:10,295 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:10,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:13:10,295 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:10,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash 810905395, now seen corresponding path program 1 times [2022-02-24 01:13:10,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:10,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120570765] [2022-02-24 01:13:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:10,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:10,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:10,302 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:10,302 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:10,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:10,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:10,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120570765] [2022-02-24 01:13:10,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1120570765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:10,379 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:10,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:13:10,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026347701] [2022-02-24 01:13:10,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:10,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:13:10,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:10,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:13:10,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:10,381 INFO L87 Difference]: Start difference. First operand 51 states and 63 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:10,474 INFO L93 Difference]: Finished difference Result 104 states and 142 transitions. [2022-02-24 01:13:10,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:13:10,474 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:13:10,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:10,475 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:13:10,475 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 01:13:10,476 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 [2022-02-24 01:13:10,476 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:10,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 45 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:10,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 01:13:10,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2022-02-24 01:13:10,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 62 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 83 transitions. [2022-02-24 01:13:10,494 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 83 transitions. Word has length 36 [2022-02-24 01:13:10,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:10,495 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 83 transitions. [2022-02-24 01:13:10,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,495 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 83 transitions. [2022-02-24 01:13:10,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:13:10,495 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:10,496 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-24 01:13:10,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:13:10,496 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:10,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:10,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1464313968, now seen corresponding path program 2 times [2022-02-24 01:13:10,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:10,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012583339] [2022-02-24 01:13:10,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:10,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:10,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:10,500 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:10,500 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:10,563 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:10,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012583339] [2022-02-24 01:13:10,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1012583339] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:10,563 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:10,563 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:13:10,563 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179082176] [2022-02-24 01:13:10,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:10,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:13:10,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:10,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:13:10,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:13:10,564 INFO L87 Difference]: Start difference. First operand 67 states and 83 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:10,651 INFO L93 Difference]: Finished difference Result 138 states and 177 transitions. [2022-02-24 01:13:10,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:13:10,652 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 01:13:10,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:10,652 INFO L225 Difference]: With dead ends: 138 [2022-02-24 01:13:10,652 INFO L226 Difference]: Without dead ends: 93 [2022-02-24 01:13:10,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:10,653 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:10,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 41 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-24 01:13:10,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 71. [2022-02-24 01:13:10,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-02-24 01:13:10,674 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 39 [2022-02-24 01:13:10,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:10,674 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-02-24 01:13:10,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,675 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-02-24 01:13:10,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:13:10,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:10,675 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-24 01:13:10,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:13:10,676 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:10,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2131958580, now seen corresponding path program 1 times [2022-02-24 01:13:10,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:10,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227349547] [2022-02-24 01:13:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:10,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:10,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:10,680 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:10,680 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:10,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:11,178 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:11,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227349547] [2022-02-24 01:13:11,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227349547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:11,178 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:11,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:11,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836952445] [2022-02-24 01:13:11,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:11,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:11,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:11,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:11,180 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:11,572 INFO L93 Difference]: Finished difference Result 90 states and 111 transitions. [2022-02-24 01:13:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:13:11,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:11,573 INFO L225 Difference]: With dead ends: 90 [2022-02-24 01:13:11,573 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 01:13:11,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:11,574 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 61 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:11,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 50 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 01:13:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-02-24 01:13:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 69 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-02-24 01:13:11,601 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-02-24 01:13:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:11,601 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-02-24 01:13:11,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-02-24 01:13:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:13:11,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:11,602 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-24 01:13:11,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:13:11,603 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:11,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1769981706, now seen corresponding path program 1 times [2022-02-24 01:13:11,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:11,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113430727] [2022-02-24 01:13:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:11,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:11,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:11,608 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:11,608 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:12,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:12,012 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:12,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113430727] [2022-02-24 01:13:12,013 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [113430727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:12,013 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:12,013 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:12,013 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028734969] [2022-02-24 01:13:12,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:12,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:12,014 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:12,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:12,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:12,014 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:12,195 INFO L93 Difference]: Finished difference Result 105 states and 128 transitions. [2022-02-24 01:13:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:12,196 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:13:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:12,197 INFO L225 Difference]: With dead ends: 105 [2022-02-24 01:13:12,197 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 01:13:12,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:12,200 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:12,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 53 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:12,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 01:13:12,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-24 01:13:12,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.2537313432835822) internal successors, (84), 67 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-02-24 01:13:12,225 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 40 [2022-02-24 01:13:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:12,225 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-02-24 01:13:12,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-02-24 01:13:12,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:13:12,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:12,226 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-24 01:13:12,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:13:12,226 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:12,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:12,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2076492661, now seen corresponding path program 1 times [2022-02-24 01:13:12,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:12,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777220048] [2022-02-24 01:13:12,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:12,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:12,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:12,230 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:12,230 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:12,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:12,688 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:12,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777220048] [2022-02-24 01:13:12,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [777220048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:12,688 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:12,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:12,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749455776] [2022-02-24 01:13:12,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:12,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:12,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:12,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:12,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:12,689 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:13,098 INFO L93 Difference]: Finished difference Result 104 states and 128 transitions. [2022-02-24 01:13:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:13,099 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 01:13:13,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:13,100 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:13:13,100 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 01:13:13,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:13,101 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 93 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:13,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 50 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:13,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 01:13:13,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-02-24 01:13:13,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.2428571428571429) internal successors, (87), 70 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 91 transitions. [2022-02-24 01:13:13,125 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 91 transitions. Word has length 41 [2022-02-24 01:13:13,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:13,125 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 91 transitions. [2022-02-24 01:13:13,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,125 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 91 transitions. [2022-02-24 01:13:13,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 01:13:13,126 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:13,126 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-24 01:13:13,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:13:13,126 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:13,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:13,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1960309197, now seen corresponding path program 1 times [2022-02-24 01:13:13,127 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:13,127 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087981870] [2022-02-24 01:13:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:13,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:13,130 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:13,130 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:13,130 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:13,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:13,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:13,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:13,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087981870] [2022-02-24 01:13:13,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087981870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:13,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:13,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:13,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135404028] [2022-02-24 01:13:13,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:13,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:13,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:13,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:13,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:13,295 INFO L87 Difference]: Start difference. First operand 75 states and 91 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:13,495 INFO L93 Difference]: Finished difference Result 120 states and 148 transitions. [2022-02-24 01:13:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:13,495 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:13:13,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:13,496 INFO L225 Difference]: With dead ends: 120 [2022-02-24 01:13:13,496 INFO L226 Difference]: Without dead ends: 115 [2022-02-24 01:13:13,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:13,497 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:13,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 42 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:13,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-24 01:13:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 77. [2022-02-24 01:13:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2361111111111112) internal successors, (89), 72 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 93 transitions. [2022-02-24 01:13:13,521 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 93 transitions. Word has length 41 [2022-02-24 01:13:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:13,521 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 93 transitions. [2022-02-24 01:13:13,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 93 transitions. [2022-02-24 01:13:13,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:13:13,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:13,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 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] [2022-02-24 01:13:13,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:13:13,522 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:13,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:13,523 INFO L85 PathProgramCache]: Analyzing trace with hash -727315291, now seen corresponding path program 1 times [2022-02-24 01:13:13,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:13,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299361154] [2022-02-24 01:13:13,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:13,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:13,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:13,525 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:13,526 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:13,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:13,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299361154] [2022-02-24 01:13:13,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1299361154] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:13,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:13,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:13,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051754342] [2022-02-24 01:13:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:13,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:13,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:13,595 INFO L87 Difference]: Start difference. First operand 77 states and 93 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:13,901 INFO L93 Difference]: Finished difference Result 284 states and 362 transitions. [2022-02-24 01:13:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:13,902 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:13:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:13,903 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:13:13,903 INFO L226 Difference]: Without dead ends: 255 [2022-02-24 01:13:13,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:13,904 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:13,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 62 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:13,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-24 01:13:13,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 83. [2022-02-24 01:13:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 78 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-02-24 01:13:13,933 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 42 [2022-02-24 01:13:13,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:13,933 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-02-24 01:13:13,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,933 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-02-24 01:13:13,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:13:13,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:13,934 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 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] [2022-02-24 01:13:13,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:13:13,934 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:13,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1280661403, now seen corresponding path program 2 times [2022-02-24 01:13:13,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:13,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606014054] [2022-02-24 01:13:13,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:13,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:13,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:13,938 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:13,938 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:13,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:14,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:14,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:14,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606014054] [2022-02-24 01:13:14,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [606014054] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:14,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:14,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:13:14,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314304095] [2022-02-24 01:13:14,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:14,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:13:14,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:14,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:13:14,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:13:14,066 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:14,437 INFO L93 Difference]: Finished difference Result 301 states and 383 transitions. [2022-02-24 01:13:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:14,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:13:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:14,439 INFO L225 Difference]: With dead ends: 301 [2022-02-24 01:13:14,439 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:13:14,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:14,440 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:14,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 100 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:14,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:13:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 85. [2022-02-24 01:13:14,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.25) internal successors, (100), 80 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2022-02-24 01:13:14,471 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 46 [2022-02-24 01:13:14,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:14,471 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2022-02-24 01:13:14,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,472 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2022-02-24 01:13:14,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:13:14,472 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:14,472 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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] [2022-02-24 01:13:14,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:13:14,472 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:14,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:14,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1482276086, now seen corresponding path program 3 times [2022-02-24 01:13:14,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:14,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557972312] [2022-02-24 01:13:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:14,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:14,476 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:14,476 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:14,476 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:14,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:14,595 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:14,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557972312] [2022-02-24 01:13:14,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [557972312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:14,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:14,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:14,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168356521] [2022-02-24 01:13:14,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:14,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:14,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:14,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:14,597 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:15,217 INFO L93 Difference]: Finished difference Result 443 states and 569 transitions. [2022-02-24 01:13:15,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:13:15,217 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:13:15,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:15,219 INFO L225 Difference]: With dead ends: 443 [2022-02-24 01:13:15,219 INFO L226 Difference]: Without dead ends: 414 [2022-02-24 01:13:15,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:15,221 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 276 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:15,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 112 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:15,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-24 01:13:15,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 89. [2022-02-24 01:13:15,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 110 transitions. [2022-02-24 01:13:15,257 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 110 transitions. Word has length 48 [2022-02-24 01:13:15,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:15,258 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 110 transitions. [2022-02-24 01:13:15,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,258 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 110 transitions. [2022-02-24 01:13:15,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:13:15,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:15,258 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:15,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:13:15,259 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:15,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:15,259 INFO L85 PathProgramCache]: Analyzing trace with hash -145264029, now seen corresponding path program 1 times [2022-02-24 01:13:15,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:15,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918593897] [2022-02-24 01:13:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:15,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:15,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:15,263 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:15,263 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:15,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:15,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:15,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918593897] [2022-02-24 01:13:15,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918593897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:15,423 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:15,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:15,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067658873] [2022-02-24 01:13:15,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:15,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:15,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:15,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:15,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:15,424 INFO L87 Difference]: Start difference. First operand 89 states and 110 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:15,742 INFO L93 Difference]: Finished difference Result 161 states and 201 transitions. [2022-02-24 01:13:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:13:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:13:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:15,743 INFO L225 Difference]: With dead ends: 161 [2022-02-24 01:13:15,744 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 01:13:15,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:15,744 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 127 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:15,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 90 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:15,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 01:13:15,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 117. [2022-02-24 01:13:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.2678571428571428) internal successors, (142), 112 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 146 transitions. [2022-02-24 01:13:15,799 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 146 transitions. Word has length 51 [2022-02-24 01:13:15,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:15,799 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 146 transitions. [2022-02-24 01:13:15,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,799 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 146 transitions. [2022-02-24 01:13:15,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:13:15,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:15,800 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:15,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:13:15,800 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:15,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:15,800 INFO L85 PathProgramCache]: Analyzing trace with hash -732070043, now seen corresponding path program 1 times [2022-02-24 01:13:15,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:15,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061944873] [2022-02-24 01:13:15,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:15,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:15,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:15,803 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:15,803 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:16,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:16,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061944873] [2022-02-24 01:13:16,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061944873] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:16,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:16,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:13:16,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950956419] [2022-02-24 01:13:16,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:16,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:13:16,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:13:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:16,938 INFO L87 Difference]: Start difference. First operand 117 states and 146 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:17,662 INFO L93 Difference]: Finished difference Result 326 states and 417 transitions. [2022-02-24 01:13:17,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:13:17,662 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:13:17,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:17,663 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:13:17,663 INFO L226 Difference]: Without dead ends: 258 [2022-02-24 01:13:17,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:17,665 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:17,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 70 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-24 01:13:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 174. [2022-02-24 01:13:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 169 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 221 transitions. [2022-02-24 01:13:17,756 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 221 transitions. Word has length 51 [2022-02-24 01:13:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 221 transitions. [2022-02-24 01:13:17,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,756 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 221 transitions. [2022-02-24 01:13:17,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:13:17,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:17,757 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:17,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:13:17,757 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:17,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:17,758 INFO L85 PathProgramCache]: Analyzing trace with hash -810376151, now seen corresponding path program 2 times [2022-02-24 01:13:17,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:17,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485025548] [2022-02-24 01:13:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:17,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:17,761 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:17,761 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:17,761 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:18,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:18,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:18,989 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:18,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485025548] [2022-02-24 01:13:18,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485025548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:18,989 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:18,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:18,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960272850] [2022-02-24 01:13:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:18,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:18,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:18,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:18,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:18,991 INFO L87 Difference]: Start difference. First operand 174 states and 221 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2022-02-24 01:13:20,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,014 INFO L93 Difference]: Finished difference Result 380 states and 484 transitions. [2022-02-24 01:13:20,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:13:20,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 51 [2022-02-24 01:13:20,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,021 INFO L225 Difference]: With dead ends: 380 [2022-02-24 01:13:20,021 INFO L226 Difference]: Without dead ends: 291 [2022-02-24 01:13:20,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:13:20,023 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 179 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 72 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:20,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-24 01:13:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 210. [2022-02-24 01:13:20,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.278048780487805) internal successors, (262), 205 states have internal predecessors, (262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 266 transitions. [2022-02-24 01:13:20,110 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 266 transitions. Word has length 51 [2022-02-24 01:13:20,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,110 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 266 transitions. [2022-02-24 01:13:20,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2022-02-24 01:13:20,111 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 266 transitions. [2022-02-24 01:13:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:13:20,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,111 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:13:20,112 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,112 INFO L85 PathProgramCache]: Analyzing trace with hash -4715419, now seen corresponding path program 1 times [2022-02-24 01:13:20,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415766204] [2022-02-24 01:13:20,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,115 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,115 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:21,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:21,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415766204] [2022-02-24 01:13:21,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [415766204] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:21,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:21,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:13:21,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093363805] [2022-02-24 01:13:21,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:21,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:13:21,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:21,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:13:21,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:21,043 INFO L87 Difference]: Start difference. First operand 210 states and 266 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:21,820 INFO L93 Difference]: Finished difference Result 368 states and 464 transitions. [2022-02-24 01:13:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:13:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:13:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:21,822 INFO L225 Difference]: With dead ends: 368 [2022-02-24 01:13:21,822 INFO L226 Difference]: Without dead ends: 309 [2022-02-24 01:13:21,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:13:21,823 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 157 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:21,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 54 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:21,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2022-02-24 01:13:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 227. [2022-02-24 01:13:21,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.2477477477477477) internal successors, (277), 222 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 281 transitions. [2022-02-24 01:13:21,925 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 281 transitions. Word has length 51 [2022-02-24 01:13:21,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:21,925 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 281 transitions. [2022-02-24 01:13:21,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,925 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 281 transitions. [2022-02-24 01:13:21,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:13:21,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:21,926 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:21,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:13:21,926 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:21,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:21,927 INFO L85 PathProgramCache]: Analyzing trace with hash -198494423, now seen corresponding path program 2 times [2022-02-24 01:13:21,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:21,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407986134] [2022-02-24 01:13:21,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:21,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:21,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:21,930 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:21,930 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:23,086 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:23,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407986134] [2022-02-24 01:13:23,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [407986134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:23,086 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:23,086 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:23,086 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697454086] [2022-02-24 01:13:23,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:23,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:23,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:23,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:23,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:23,087 INFO L87 Difference]: Start difference. First operand 227 states and 281 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2022-02-24 01:13:24,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:24,121 INFO L93 Difference]: Finished difference Result 385 states and 477 transitions. [2022-02-24 01:13:24,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:13:24,122 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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 51 [2022-02-24 01:13:24,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:24,123 INFO L225 Difference]: With dead ends: 385 [2022-02-24 01:13:24,123 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:13:24,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:13:24,124 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 198 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:24,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 66 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:24,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:13:24,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 207. [2022-02-24 01:13:24,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.2277227722772277) internal successors, (248), 202 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 252 transitions. [2022-02-24 01:13:24,233 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 252 transitions. Word has length 51 [2022-02-24 01:13:24,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:24,233 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 252 transitions. [2022-02-24 01:13:24,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 17 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) [2022-02-24 01:13:24,233 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 252 transitions. [2022-02-24 01:13:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:13:24,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:24,234 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 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] [2022-02-24 01:13:24,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:13:24,234 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:24,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1931900780, now seen corresponding path program 4 times [2022-02-24 01:13:24,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:24,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250517703] [2022-02-24 01:13:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:24,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:24,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:24,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:24,237 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:24,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:24,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250517703] [2022-02-24 01:13:24,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1250517703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:24,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:24,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:13:24,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491147510] [2022-02-24 01:13:24,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:24,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:13:24,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:24,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:13:24,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:24,373 INFO L87 Difference]: Start difference. First operand 207 states and 252 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-02-24 01:13:25,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:25,354 INFO L93 Difference]: Finished difference Result 838 states and 1070 transitions. [2022-02-24 01:13:25,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:25,355 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 52 [2022-02-24 01:13:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:25,358 INFO L225 Difference]: With dead ends: 838 [2022-02-24 01:13:25,358 INFO L226 Difference]: Without dead ends: 809 [2022-02-24 01:13:25,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:13:25,359 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 326 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1110 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:25,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 165 Invalid, 1133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-24 01:13:25,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 211. [2022-02-24 01:13:25,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.233009708737864) internal successors, (254), 206 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 258 transitions. [2022-02-24 01:13:25,475 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 258 transitions. Word has length 52 [2022-02-24 01:13:25,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:25,475 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 258 transitions. [2022-02-24 01:13:25,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2022-02-24 01:13:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 258 transitions. [2022-02-24 01:13:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 01:13:25,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:25,476 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:25,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:13:25,476 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:25,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:25,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1617347862, now seen corresponding path program 3 times [2022-02-24 01:13:25,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:25,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334466441] [2022-02-24 01:13:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:25,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:25,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:25,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:25,480 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:25,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:25,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:25,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:25,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:25,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334466441] [2022-02-24 01:13:25,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [334466441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:25,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:25,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:25,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421057596] [2022-02-24 01:13:25,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:25,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:25,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:25,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:25,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:25,581 INFO L87 Difference]: Start difference. First operand 211 states and 258 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-02-24 01:13:26,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:26,088 INFO L93 Difference]: Finished difference Result 493 states and 621 transitions. [2022-02-24 01:13:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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 53 [2022-02-24 01:13:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:26,090 INFO L225 Difference]: With dead ends: 493 [2022-02-24 01:13:26,090 INFO L226 Difference]: Without dead ends: 445 [2022-02-24 01:13:26,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:26,091 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 192 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:26,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 69 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:26,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-24 01:13:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 234. [2022-02-24 01:13:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.240174672489083) internal successors, (284), 229 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 288 transitions. [2022-02-24 01:13:26,226 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 288 transitions. Word has length 53 [2022-02-24 01:13:26,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:26,226 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 288 transitions. [2022-02-24 01:13:26,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 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) [2022-02-24 01:13:26,226 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 288 transitions. [2022-02-24 01:13:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:13:26,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:26,227 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:26,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:13:26,228 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:26,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:26,228 INFO L85 PathProgramCache]: Analyzing trace with hash -2072849753, now seen corresponding path program 2 times [2022-02-24 01:13:26,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:26,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239950446] [2022-02-24 01:13:26,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:26,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:26,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:26,231 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:26,231 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:26,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:26,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:26,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239950446] [2022-02-24 01:13:26,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [239950446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:26,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:26,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:13:26,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683487701] [2022-02-24 01:13:26,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:26,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:13:26,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:26,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:13:26,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:13:26,290 INFO L87 Difference]: Start difference. First operand 234 states and 288 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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) [2022-02-24 01:13:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:26,532 INFO L93 Difference]: Finished difference Result 396 states and 487 transitions. [2022-02-24 01:13:26,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:13:26,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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 54 [2022-02-24 01:13:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:26,533 INFO L225 Difference]: With dead ends: 396 [2022-02-24 01:13:26,533 INFO L226 Difference]: Without dead ends: 233 [2022-02-24 01:13:26,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:26,535 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:26,535 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 53 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-24 01:13:26,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 214. [2022-02-24 01:13:26,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.167464114832536) internal successors, (244), 209 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2022-02-24 01:13:26,639 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 54 [2022-02-24 01:13:26,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:26,639 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2022-02-24 01:13:26,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 5 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) [2022-02-24 01:13:26,640 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2022-02-24 01:13:26,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-24 01:13:26,640 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:26,640 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:26,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:13:26,640 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:26,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:26,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1965807313, now seen corresponding path program 4 times [2022-02-24 01:13:26,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:26,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839363278] [2022-02-24 01:13:26,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:26,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:26,643 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:26,643 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:26,643 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:26,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:26,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:26,755 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:26,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839363278] [2022-02-24 01:13:26,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839363278] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:26,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:26,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:26,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128646056] [2022-02-24 01:13:26,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:26,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:26,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:26,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:26,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:26,756 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-02-24 01:13:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:27,555 INFO L93 Difference]: Finished difference Result 585 states and 693 transitions. [2022-02-24 01:13:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:13:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 55 [2022-02-24 01:13:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:27,557 INFO L225 Difference]: With dead ends: 585 [2022-02-24 01:13:27,557 INFO L226 Difference]: Without dead ends: 540 [2022-02-24 01:13:27,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:13:27,558 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 222 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:27,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 90 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:27,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-02-24 01:13:27,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 214. [2022-02-24 01:13:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.167464114832536) internal successors, (244), 209 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:27,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 248 transitions. [2022-02-24 01:13:27,715 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 248 transitions. Word has length 55 [2022-02-24 01:13:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:27,716 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 248 transitions. [2022-02-24 01:13:27,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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) [2022-02-24 01:13:27,716 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 248 transitions. [2022-02-24 01:13:27,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:13:27,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:27,717 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 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] [2022-02-24 01:13:27,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:13:27,717 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:27,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:27,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1954216222, now seen corresponding path program 5 times [2022-02-24 01:13:27,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:27,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014854917] [2022-02-24 01:13:27,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:27,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:27,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:27,720 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:27,720 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:27,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:27,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:27,886 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:27,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014854917] [2022-02-24 01:13:27,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1014854917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:27,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:27,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:13:27,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286864035] [2022-02-24 01:13:27,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:27,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:13:27,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:13:27,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:13:27,888 INFO L87 Difference]: Start difference. First operand 214 states and 248 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-02-24 01:13:29,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:29,407 INFO L93 Difference]: Finished difference Result 1011 states and 1212 transitions. [2022-02-24 01:13:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:13:29,408 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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 56 [2022-02-24 01:13:29,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:29,411 INFO L225 Difference]: With dead ends: 1011 [2022-02-24 01:13:29,411 INFO L226 Difference]: Without dead ends: 982 [2022-02-24 01:13:29,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:29,412 INFO L933 BasicCegarLoop]: 161 mSDtfsCounter, 418 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1660 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:29,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 208 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1660 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:29,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 982 states. [2022-02-24 01:13:29,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 982 to 218. [2022-02-24 01:13:29,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 213 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-02-24 01:13:29,537 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 56 [2022-02-24 01:13:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:29,538 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-02-24 01:13:29,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 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) [2022-02-24 01:13:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-02-24 01:13:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 01:13:29,538 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:29,538 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:29,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:13:29,539 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1827890636, now seen corresponding path program 5 times [2022-02-24 01:13:29,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:29,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891830035] [2022-02-24 01:13:29,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:29,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:29,541 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:29,541 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:29,541 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:29,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:29,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:29,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:29,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891830035] [2022-02-24 01:13:29,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [891830035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:29,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:29,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:29,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310416279] [2022-02-24 01:13:29,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:29,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:29,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:29,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:29,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:29,677 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2022-02-24 01:13:30,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:30,626 INFO L93 Difference]: Finished difference Result 684 states and 813 transitions. [2022-02-24 01:13:30,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:13:30,626 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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 57 [2022-02-24 01:13:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:30,628 INFO L225 Difference]: With dead ends: 684 [2022-02-24 01:13:30,628 INFO L226 Difference]: Without dead ends: 639 [2022-02-24 01:13:30,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:30,629 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 239 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:30,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 119 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:30,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2022-02-24 01:13:30,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 218. [2022-02-24 01:13:30,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 213 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:30,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-02-24 01:13:30,772 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 57 [2022-02-24 01:13:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:30,772 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-02-24 01:13:30,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 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) [2022-02-24 01:13:30,772 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-02-24 01:13:30,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 01:13:30,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:30,773 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:30,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:13:30,773 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:30,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:30,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1861017081, now seen corresponding path program 6 times [2022-02-24 01:13:30,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:30,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746540803] [2022-02-24 01:13:30,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:30,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:30,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:30,776 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:30,777 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:30,917 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:30,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746540803] [2022-02-24 01:13:30,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1746540803] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:30,917 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:30,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:13:30,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503457464] [2022-02-24 01:13:30,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:30,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:13:30,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:30,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:13:30,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:30,918 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2022-02-24 01:13:32,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:32,066 INFO L93 Difference]: Finished difference Result 779 states and 927 transitions. [2022-02-24 01:13:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:13:32,066 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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 59 [2022-02-24 01:13:32,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:32,068 INFO L225 Difference]: With dead ends: 779 [2022-02-24 01:13:32,068 INFO L226 Difference]: Without dead ends: 734 [2022-02-24 01:13:32,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:32,069 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 283 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:32,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 141 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:32,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2022-02-24 01:13:32,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 218. [2022-02-24 01:13:32,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.1737089201877935) internal successors, (250), 213 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:32,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 254 transitions. [2022-02-24 01:13:32,220 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 254 transitions. Word has length 59 [2022-02-24 01:13:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:32,220 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 254 transitions. [2022-02-24 01:13:32,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 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) [2022-02-24 01:13:32,220 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 254 transitions. [2022-02-24 01:13:32,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:32,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:32,221 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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] [2022-02-24 01:13:32,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:13:32,221 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:32,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:32,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1813405083, now seen corresponding path program 3 times [2022-02-24 01:13:32,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:32,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397934261] [2022-02-24 01:13:32,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:32,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:32,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:32,223 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:32,223 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:32,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:32,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:32,329 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:32,329 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397934261] [2022-02-24 01:13:32,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [397934261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:32,329 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:32,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:32,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868803377] [2022-02-24 01:13:32,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:32,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:32,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:32,330 INFO L87 Difference]: Start difference. First operand 218 states and 254 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2022-02-24 01:13:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:32,687 INFO L93 Difference]: Finished difference Result 304 states and 352 transitions. [2022-02-24 01:13:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:13:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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 60 [2022-02-24 01:13:32,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:32,689 INFO L225 Difference]: With dead ends: 304 [2022-02-24 01:13:32,689 INFO L226 Difference]: Without dead ends: 228 [2022-02-24 01:13:32,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:32,690 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:32,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 52 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-24 01:13:32,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 182. [2022-02-24 01:13:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.1807909604519775) internal successors, (209), 177 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 213 transitions. [2022-02-24 01:13:32,802 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 213 transitions. Word has length 60 [2022-02-24 01:13:32,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:32,802 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 213 transitions. [2022-02-24 01:13:32,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 6 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) [2022-02-24 01:13:32,802 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 213 transitions. [2022-02-24 01:13:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:32,803 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:32,803 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 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] [2022-02-24 01:13:32,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:13:32,803 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:32,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:32,803 INFO L85 PathProgramCache]: Analyzing trace with hash 713223000, now seen corresponding path program 6 times [2022-02-24 01:13:32,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:32,804 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808206496] [2022-02-24 01:13:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:32,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:32,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:32,805 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:32,805 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:32,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:32,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:32,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:33,000 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:33,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808206496] [2022-02-24 01:13:33,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808206496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:33,000 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:33,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:13:33,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935885294] [2022-02-24 01:13:33,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:33,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:13:33,001 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:33,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:13:33,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:33,001 INFO L87 Difference]: Start difference. First operand 182 states and 213 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-02-24 01:13:35,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:35,039 INFO L93 Difference]: Finished difference Result 1169 states and 1405 transitions. [2022-02-24 01:13:35,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:13:35,039 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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 60 [2022-02-24 01:13:35,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:35,042 INFO L225 Difference]: With dead ends: 1169 [2022-02-24 01:13:35,042 INFO L226 Difference]: Without dead ends: 1140 [2022-02-24 01:13:35,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:13:35,044 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 500 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 2551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:35,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [500 Valid, 256 Invalid, 2551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:13:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-02-24 01:13:35,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 186. [2022-02-24 01:13:35,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.1878453038674033) internal successors, (215), 181 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:35,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 219 transitions. [2022-02-24 01:13:35,171 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 219 transitions. Word has length 60 [2022-02-24 01:13:35,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:35,171 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 219 transitions. [2022-02-24 01:13:35,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 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) [2022-02-24 01:13:35,172 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 219 transitions. [2022-02-24 01:13:35,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:13:35,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:35,172 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:35,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:13:35,172 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:35,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:35,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1971018387, now seen corresponding path program 4 times [2022-02-24 01:13:35,173 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:35,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636659155] [2022-02-24 01:13:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:35,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:35,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:35,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:35,175 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:35,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:35,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:35,637 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:35,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636659155] [2022-02-24 01:13:35,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [636659155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:35,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:35,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:35,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972398468] [2022-02-24 01:13:35,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:35,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:35,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:35,638 INFO L87 Difference]: Start difference. First operand 186 states and 219 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-02-24 01:13:36,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:36,108 INFO L93 Difference]: Finished difference Result 222 states and 259 transitions. [2022-02-24 01:13:36,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:13:36,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 61 [2022-02-24 01:13:36,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:36,109 INFO L225 Difference]: With dead ends: 222 [2022-02-24 01:13:36,109 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:13:36,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:13:36,110 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:36,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 58 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:36,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:13:36,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-02-24 01:13:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 141 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 176 transitions. [2022-02-24 01:13:36,200 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 176 transitions. Word has length 61 [2022-02-24 01:13:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:36,200 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 176 transitions. [2022-02-24 01:13:36,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-02-24 01:13:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 176 transitions. [2022-02-24 01:13:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-24 01:13:36,201 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:36,201 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:36,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:13:36,201 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:36,201 INFO L85 PathProgramCache]: Analyzing trace with hash -741653378, now seen corresponding path program 7 times [2022-02-24 01:13:36,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:36,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139472420] [2022-02-24 01:13:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:36,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:36,204 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:36,204 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:36,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:36,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:36,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139472420] [2022-02-24 01:13:36,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [139472420] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:36,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:36,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:36,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121119126] [2022-02-24 01:13:36,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:36,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:36,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:36,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:36,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:36,374 INFO L87 Difference]: Start difference. First operand 146 states and 176 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-02-24 01:13:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:37,584 INFO L93 Difference]: Finished difference Result 775 states and 931 transitions. [2022-02-24 01:13:37,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:37,584 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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 61 [2022-02-24 01:13:37,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:37,586 INFO L225 Difference]: With dead ends: 775 [2022-02-24 01:13:37,586 INFO L226 Difference]: Without dead ends: 730 [2022-02-24 01:13:37,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:37,586 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 278 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:37,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 146 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:37,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2022-02-24 01:13:37,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 146. [2022-02-24 01:13:37,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.2198581560283688) internal successors, (172), 141 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:37,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 176 transitions. [2022-02-24 01:13:37,705 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 176 transitions. Word has length 61 [2022-02-24 01:13:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:37,705 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 176 transitions. [2022-02-24 01:13:37,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 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) [2022-02-24 01:13:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 176 transitions. [2022-02-24 01:13:37,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:37,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:37,706 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 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] [2022-02-24 01:13:37,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:13:37,706 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:37,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:37,706 INFO L85 PathProgramCache]: Analyzing trace with hash -891810688, now seen corresponding path program 5 times [2022-02-24 01:13:37,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:37,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130095151] [2022-02-24 01:13:37,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:37,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:37,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:37,708 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:37,709 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:39,182 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:39,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130095151] [2022-02-24 01:13:39,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130095151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:39,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:39,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:13:39,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524929384] [2022-02-24 01:13:39,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:39,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:13:39,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:39,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:13:39,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:13:39,183 INFO L87 Difference]: Start difference. First operand 146 states and 176 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:40,693 INFO L93 Difference]: Finished difference Result 385 states and 460 transitions. [2022-02-24 01:13:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:13:40,693 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:13:40,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:40,694 INFO L225 Difference]: With dead ends: 385 [2022-02-24 01:13:40,694 INFO L226 Difference]: Without dead ends: 352 [2022-02-24 01:13:40,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:13:40,696 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 259 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:40,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 59 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:40,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-24 01:13:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 182. [2022-02-24 01:13:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.2033898305084745) internal successors, (213), 177 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 217 transitions. [2022-02-24 01:13:40,900 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 217 transitions. Word has length 62 [2022-02-24 01:13:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:40,900 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 217 transitions. [2022-02-24 01:13:40,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:40,901 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 217 transitions. [2022-02-24 01:13:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:40,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:40,901 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 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] [2022-02-24 01:13:40,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:13:40,902 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:40,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:40,902 INFO L85 PathProgramCache]: Analyzing trace with hash -970116796, now seen corresponding path program 6 times [2022-02-24 01:13:40,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:40,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197704485] [2022-02-24 01:13:40,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:40,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:40,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:40,905 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:40,905 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:40,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:42,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:42,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197704485] [2022-02-24 01:13:42,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [197704485] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:42,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:42,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:13:42,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983921398] [2022-02-24 01:13:42,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:42,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:13:42,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:13:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:42,069 INFO L87 Difference]: Start difference. First operand 182 states and 217 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:43,838 INFO L93 Difference]: Finished difference Result 508 states and 604 transitions. [2022-02-24 01:13:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:13:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:13:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:43,840 INFO L225 Difference]: With dead ends: 508 [2022-02-24 01:13:43,840 INFO L226 Difference]: Without dead ends: 503 [2022-02-24 01:13:43,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=290, Invalid=1192, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:13:43,840 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 239 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:43,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 103 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:43,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-02-24 01:13:44,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 235. [2022-02-24 01:13:44,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.2130434782608697) internal successors, (279), 230 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 283 transitions. [2022-02-24 01:13:44,097 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 283 transitions. Word has length 62 [2022-02-24 01:13:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:44,097 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 283 transitions. [2022-02-24 01:13:44,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,097 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 283 transitions. [2022-02-24 01:13:44,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:44,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:44,098 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:44,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:13:44,098 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:44,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1338068092, now seen corresponding path program 8 times [2022-02-24 01:13:44,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:44,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815249222] [2022-02-24 01:13:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:44,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:44,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:44,101 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:44,101 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:44,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:44,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:44,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815249222] [2022-02-24 01:13:44,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815249222] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:44,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:44,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:13:44,401 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946089661] [2022-02-24 01:13:44,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:44,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:13:44,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:13:44,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:44,401 INFO L87 Difference]: Start difference. First operand 235 states and 283 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:44,971 INFO L93 Difference]: Finished difference Result 370 states and 440 transitions. [2022-02-24 01:13:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:13:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:13:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:44,972 INFO L225 Difference]: With dead ends: 370 [2022-02-24 01:13:44,972 INFO L226 Difference]: Without dead ends: 365 [2022-02-24 01:13:44,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:13:44,973 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 154 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:44,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 50 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:44,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-24 01:13:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 198. [2022-02-24 01:13:45,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2072538860103628) internal successors, (233), 193 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 237 transitions. [2022-02-24 01:13:45,148 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 237 transitions. Word has length 62 [2022-02-24 01:13:45,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:45,148 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 237 transitions. [2022-02-24 01:13:45,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 237 transitions. [2022-02-24 01:13:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:13:45,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:45,149 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 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] [2022-02-24 01:13:45,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:13:45,149 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:45,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:45,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1517007984, now seen corresponding path program 7 times [2022-02-24 01:13:45,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:45,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237181127] [2022-02-24 01:13:45,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:45,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:45,151 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:45,151 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:45,151 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:45,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:45,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:45,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237181127] [2022-02-24 01:13:45,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1237181127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:45,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:45,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:13:45,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434454414] [2022-02-24 01:13:45,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:45,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:13:45,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:45,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:13:45,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:45,306 INFO L87 Difference]: Start difference. First operand 198 states and 237 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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) [2022-02-24 01:13:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:46,057 INFO L93 Difference]: Finished difference Result 344 states and 408 transitions. [2022-02-24 01:13:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:13:46,057 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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 72 [2022-02-24 01:13:46,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:46,058 INFO L225 Difference]: With dead ends: 344 [2022-02-24 01:13:46,058 INFO L226 Difference]: Without dead ends: 339 [2022-02-24 01:13:46,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:13:46,059 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 179 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:46,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 140 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:46,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-24 01:13:46,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 246. [2022-02-24 01:13:46,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.2033195020746887) internal successors, (290), 241 states have internal predecessors, (290), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 294 transitions. [2022-02-24 01:13:46,309 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 294 transitions. Word has length 72 [2022-02-24 01:13:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:46,309 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 294 transitions. [2022-02-24 01:13:46,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 9 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) [2022-02-24 01:13:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 294 transitions. [2022-02-24 01:13:46,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:13:46,310 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:46,310 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:13:46,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:13:46,311 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash 930201970, now seen corresponding path program 8 times [2022-02-24 01:13:46,311 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:46,311 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452063783] [2022-02-24 01:13:46,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:46,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:46,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:46,314 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:46,314 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:46,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:47,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:47,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:47,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452063783] [2022-02-24 01:13:47,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452063783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:47,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:47,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:47,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498546734] [2022-02-24 01:13:47,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:47,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:47,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:47,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:47,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:47,308 INFO L87 Difference]: Start difference. First operand 246 states and 294 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:48,330 INFO L93 Difference]: Finished difference Result 550 states and 652 transitions. [2022-02-24 01:13:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:48,331 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:13:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:48,332 INFO L225 Difference]: With dead ends: 550 [2022-02-24 01:13:48,332 INFO L226 Difference]: Without dead ends: 496 [2022-02-24 01:13:48,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:48,333 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 269 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 394 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:48,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 44 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 394 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-24 01:13:48,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 355. [2022-02-24 01:13:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.2028571428571428) internal successors, (421), 350 states have internal predecessors, (421), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:48,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 425 transitions. [2022-02-24 01:13:48,740 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 425 transitions. Word has length 72 [2022-02-24 01:13:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:48,740 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 425 transitions. [2022-02-24 01:13:48,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 425 transitions. [2022-02-24 01:13:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:13:48,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:48,741 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:13:48,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:13:48,742 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:48,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:48,742 INFO L85 PathProgramCache]: Analyzing trace with hash -288430350, now seen corresponding path program 9 times [2022-02-24 01:13:48,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:48,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67830203] [2022-02-24 01:13:48,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:48,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:48,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:48,744 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:48,744 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:49,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:49,544 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67830203] [2022-02-24 01:13:49,544 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [67830203] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:49,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:49,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:13:49,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716312411] [2022-02-24 01:13:49,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:49,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:13:49,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:49,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:13:49,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:13:49,546 INFO L87 Difference]: Start difference. First operand 355 states and 425 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2022-02-24 01:13:51,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:51,202 INFO L93 Difference]: Finished difference Result 1031 states and 1217 transitions. [2022-02-24 01:13:51,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:13:51,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 72 [2022-02-24 01:13:51,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:51,204 INFO L225 Difference]: With dead ends: 1031 [2022-02-24 01:13:51,204 INFO L226 Difference]: Without dead ends: 926 [2022-02-24 01:13:51,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=249, Invalid=743, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:13:51,205 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 355 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:51,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 50 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:51,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-02-24 01:13:51,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 443. [2022-02-24 01:13:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 438 states have (on average 1.2009132420091324) internal successors, (526), 438 states have internal predecessors, (526), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:51,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 530 transitions. [2022-02-24 01:13:51,703 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 530 transitions. Word has length 72 [2022-02-24 01:13:51,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:51,703 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 530 transitions. [2022-02-24 01:13:51,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2022-02-24 01:13:51,703 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 530 transitions. [2022-02-24 01:13:51,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:13:51,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:51,705 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:13:51,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:13:51,705 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash -188563146, now seen corresponding path program 10 times [2022-02-24 01:13:51,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:51,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000488752] [2022-02-24 01:13:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:51,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:51,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:51,708 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:51,708 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:53,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:53,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:53,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:53,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000488752] [2022-02-24 01:13:53,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1000488752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:53,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:53,219 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:13:53,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254655653] [2022-02-24 01:13:53,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:53,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:13:53,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:53,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:13:53,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:13:53,219 INFO L87 Difference]: Start difference. First operand 443 states and 530 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:55,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:55,763 INFO L93 Difference]: Finished difference Result 1119 states and 1330 transitions. [2022-02-24 01:13:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:13:55,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:13:55,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:55,768 INFO L225 Difference]: With dead ends: 1119 [2022-02-24 01:13:55,768 INFO L226 Difference]: Without dead ends: 1056 [2022-02-24 01:13:55,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=328, Invalid=1312, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:13:55,769 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 229 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:55,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 94 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:55,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-02-24 01:13:56,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 591. [2022-02-24 01:13:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 586 states have (on average 1.1962457337883958) internal successors, (701), 586 states have internal predecessors, (701), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 705 transitions. [2022-02-24 01:13:56,478 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 705 transitions. Word has length 72 [2022-02-24 01:13:56,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:56,478 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 705 transitions. [2022-02-24 01:13:56,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:56,478 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 705 transitions. [2022-02-24 01:13:56,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:13:56,479 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:56,480 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:13:56,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:13:56,480 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:56,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:56,480 INFO L85 PathProgramCache]: Analyzing trace with hash 673002482, now seen corresponding path program 11 times [2022-02-24 01:13:56,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:56,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1207783571] [2022-02-24 01:13:56,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:56,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:56,483 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:56,483 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:56,483 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:56,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:57,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:57,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:57,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:57,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:57,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1207783571] [2022-02-24 01:13:57,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1207783571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:57,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:57,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:13:57,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641444343] [2022-02-24 01:13:57,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:57,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:13:57,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:57,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:13:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:13:57,542 INFO L87 Difference]: Start difference. First operand 591 states and 705 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-24 01:13:59,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:59,788 INFO L93 Difference]: Finished difference Result 1100 states and 1303 transitions. [2022-02-24 01:13:59,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:13:59,788 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 72 [2022-02-24 01:13:59,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:59,791 INFO L225 Difference]: With dead ends: 1100 [2022-02-24 01:13:59,791 INFO L226 Difference]: Without dead ends: 1056 [2022-02-24 01:13:59,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=991, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:13:59,792 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 210 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:59,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 92 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 767 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-02-24 01:14:00,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 753. [2022-02-24 01:14:00,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 748 states have (on average 1.1925133689839573) internal successors, (892), 748 states have internal predecessors, (892), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:00,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 896 transitions. [2022-02-24 01:14:00,726 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 896 transitions. Word has length 72 [2022-02-24 01:14:00,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:00,726 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 896 transitions. [2022-02-24 01:14:00,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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) [2022-02-24 01:14:00,726 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 896 transitions. [2022-02-24 01:14:00,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:14:00,728 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:00,728 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:14:00,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:14:00,728 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:00,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:00,728 INFO L85 PathProgramCache]: Analyzing trace with hash 479223478, now seen corresponding path program 12 times [2022-02-24 01:14:00,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:00,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835920269] [2022-02-24 01:14:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:00,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:00,731 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:00,731 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:00,731 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:00,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:02,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:02,066 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:02,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835920269] [2022-02-24 01:14:02,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [835920269] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:02,066 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:02,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:14:02,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519984714] [2022-02-24 01:14:02,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:02,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:14:02,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:02,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:14:02,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:14:02,068 INFO L87 Difference]: Start difference. First operand 753 states and 896 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:04,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:04,451 INFO L93 Difference]: Finished difference Result 1284 states and 1517 transitions. [2022-02-24 01:14:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:14:04,451 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:14:04,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:04,453 INFO L225 Difference]: With dead ends: 1284 [2022-02-24 01:14:04,453 INFO L226 Difference]: Without dead ends: 1041 [2022-02-24 01:14:04,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:14:04,454 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 244 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:04,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 73 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 761 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:14:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2022-02-24 01:14:05,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 768. [2022-02-24 01:14:05,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 763 states have (on average 1.1874180865006554) internal successors, (906), 763 states have internal predecessors, (906), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 910 transitions. [2022-02-24 01:14:05,471 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 910 transitions. Word has length 72 [2022-02-24 01:14:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:05,472 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 910 transitions. [2022-02-24 01:14:05,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:05,472 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 910 transitions. [2022-02-24 01:14:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:14:05,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:05,474 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:14:05,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:14:05,474 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:05,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1533502382, now seen corresponding path program 13 times [2022-02-24 01:14:05,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:05,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188663235] [2022-02-24 01:14:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:05,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:05,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:05,482 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:05,482 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:06,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:06,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:06,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188663235] [2022-02-24 01:14:06,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188663235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:06,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:06,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:14:06,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982142016] [2022-02-24 01:14:06,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:06,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:14:06,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:06,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:14:06,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:14:06,560 INFO L87 Difference]: Start difference. First operand 768 states and 910 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:08,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:08,829 INFO L93 Difference]: Finished difference Result 1253 states and 1460 transitions. [2022-02-24 01:14:08,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:14:08,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:14:08,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:08,833 INFO L225 Difference]: With dead ends: 1253 [2022-02-24 01:14:08,833 INFO L226 Difference]: Without dead ends: 1096 [2022-02-24 01:14:08,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:14:08,834 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 181 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:08,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 76 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:08,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-24 01:14:09,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 890. [2022-02-24 01:14:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 885 states have (on average 1.1796610169491526) internal successors, (1044), 885 states have internal predecessors, (1044), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:09,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1048 transitions. [2022-02-24 01:14:09,963 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1048 transitions. Word has length 72 [2022-02-24 01:14:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:09,964 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 1048 transitions. [2022-02-24 01:14:09,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:09,964 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1048 transitions. [2022-02-24 01:14:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:14:09,966 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:09,966 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:14:09,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:14:09,966 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:09,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:09,967 INFO L85 PathProgramCache]: Analyzing trace with hash -532379858, now seen corresponding path program 14 times [2022-02-24 01:14:09,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:09,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405652632] [2022-02-24 01:14:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:09,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:09,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:09,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:09,969 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:11,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:11,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:11,093 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:11,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405652632] [2022-02-24 01:14:11,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405652632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:11,093 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:11,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:14:11,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460172397] [2022-02-24 01:14:11,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:11,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:14:11,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:11,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:14:11,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:14:11,095 INFO L87 Difference]: Start difference. First operand 890 states and 1048 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-02-24 01:14:13,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:13,294 INFO L93 Difference]: Finished difference Result 1216 states and 1406 transitions. [2022-02-24 01:14:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:14:13,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 72 [2022-02-24 01:14:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:13,297 INFO L225 Difference]: With dead ends: 1216 [2022-02-24 01:14:13,297 INFO L226 Difference]: Without dead ends: 1096 [2022-02-24 01:14:13,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:14:13,298 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 174 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:13,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 63 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:13,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-24 01:14:14,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 905. [2022-02-24 01:14:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 900 states have (on average 1.1688888888888889) internal successors, (1052), 900 states have internal predecessors, (1052), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1056 transitions. [2022-02-24 01:14:14,453 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1056 transitions. Word has length 72 [2022-02-24 01:14:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:14,454 INFO L470 AbstractCegarLoop]: Abstraction has 905 states and 1056 transitions. [2022-02-24 01:14:14,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-02-24 01:14:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1056 transitions. [2022-02-24 01:14:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:14:14,456 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:14,456 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2022-02-24 01:14:14,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:14:14,456 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:14,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1520169742, now seen corresponding path program 15 times [2022-02-24 01:14:14,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:14,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195082658] [2022-02-24 01:14:14,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:14,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:14,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:14,460 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:14,460 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:14,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:15,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:15,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195082658] [2022-02-24 01:14:15,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1195082658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:15,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:15,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:14:15,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310120835] [2022-02-24 01:14:15,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:15,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:14:15,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:15,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:14:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:14:15,626 INFO L87 Difference]: Start difference. First operand 905 states and 1056 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:17,899 INFO L93 Difference]: Finished difference Result 1195 states and 1375 transitions. [2022-02-24 01:14:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:14:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:14:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:17,902 INFO L225 Difference]: With dead ends: 1195 [2022-02-24 01:14:17,902 INFO L226 Difference]: Without dead ends: 1096 [2022-02-24 01:14:17,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=237, Invalid=819, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:14:17,903 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 218 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:17,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 44 Invalid, 623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:17,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-02-24 01:14:19,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 893. [2022-02-24 01:14:19,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 888 states have (on average 1.1632882882882882) internal successors, (1033), 888 states have internal predecessors, (1033), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:19,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1037 transitions. [2022-02-24 01:14:19,054 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1037 transitions. Word has length 72 [2022-02-24 01:14:19,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:19,054 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1037 transitions. [2022-02-24 01:14:19,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:19,054 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1037 transitions. [2022-02-24 01:14:19,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:14:19,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:19,056 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 3, 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] [2022-02-24 01:14:19,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:14:19,056 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:19,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:19,057 INFO L85 PathProgramCache]: Analyzing trace with hash 2132024177, now seen corresponding path program 16 times [2022-02-24 01:14:19,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:19,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407010000] [2022-02-24 01:14:19,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:19,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:19,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:19,060 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:19,060 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:19,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:19,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:19,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:19,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407010000] [2022-02-24 01:14:19,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [407010000] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:19,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:19,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:14:19,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378377392] [2022-02-24 01:14:19,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:19,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:14:19,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:14:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:14:19,231 INFO L87 Difference]: Start difference. First operand 893 states and 1037 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:23,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:23,819 INFO L93 Difference]: Finished difference Result 2837 states and 3345 transitions. [2022-02-24 01:14:23,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:14:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 01:14:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:23,826 INFO L225 Difference]: With dead ends: 2837 [2022-02-24 01:14:23,826 INFO L226 Difference]: Without dead ends: 2762 [2022-02-24 01:14:23,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:14:23,827 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 322 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1408 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:23,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 170 Invalid, 1433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1408 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:14:23,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2762 states. [2022-02-24 01:14:25,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2762 to 893. [2022-02-24 01:14:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 888 states have (on average 1.1632882882882882) internal successors, (1033), 888 states have internal predecessors, (1033), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:25,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1037 transitions. [2022-02-24 01:14:25,053 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1037 transitions. Word has length 73 [2022-02-24 01:14:25,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:25,054 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1037 transitions. [2022-02-24 01:14:25,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1037 transitions. [2022-02-24 01:14:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:14:25,055 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:25,056 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:25,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:14:25,056 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:25,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:25,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1623991599, now seen corresponding path program 17 times [2022-02-24 01:14:25,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:25,056 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735341314] [2022-02-24 01:14:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:25,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:25,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:25,059 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:25,059 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:25,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:25,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:25,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735341314] [2022-02-24 01:14:25,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [735341314] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:25,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:25,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:14:25,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854064442] [2022-02-24 01:14:25,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:25,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:14:25,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:25,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:14:25,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:14:25,200 INFO L87 Difference]: Start difference. First operand 893 states and 1037 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2022-02-24 01:14:27,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:27,964 INFO L93 Difference]: Finished difference Result 1772 states and 2059 transitions. [2022-02-24 01:14:27,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:14:27,964 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 74 [2022-02-24 01:14:27,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:27,968 INFO L225 Difference]: With dead ends: 1772 [2022-02-24 01:14:27,968 INFO L226 Difference]: Without dead ends: 1619 [2022-02-24 01:14:27,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:14:27,969 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 256 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:27,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 81 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:27,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2022-02-24 01:14:29,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 971. [2022-02-24 01:14:29,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 966 states have (on average 1.1583850931677018) internal successors, (1119), 966 states have internal predecessors, (1119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:29,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 1123 transitions. [2022-02-24 01:14:29,227 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 1123 transitions. Word has length 74 [2022-02-24 01:14:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:29,228 INFO L470 AbstractCegarLoop]: Abstraction has 971 states and 1123 transitions. [2022-02-24 01:14:29,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2022-02-24 01:14:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 1123 transitions. [2022-02-24 01:14:29,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:14:29,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:29,230 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:29,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:14:29,230 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:29,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:29,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1752054978, now seen corresponding path program 7 times [2022-02-24 01:14:29,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:29,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584639548] [2022-02-24 01:14:29,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:29,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:29,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:29,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:29,233 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:29,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:29,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:29,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:29,440 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584639548] [2022-02-24 01:14:29,440 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1584639548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:29,440 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:29,440 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:14:29,440 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729183723] [2022-02-24 01:14:29,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:29,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:14:29,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:29,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:14:29,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:14:29,441 INFO L87 Difference]: Start difference. First operand 971 states and 1123 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-02-24 01:14:37,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:37,165 INFO L93 Difference]: Finished difference Result 4466 states and 5305 transitions. [2022-02-24 01:14:37,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:14:37,166 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 74 [2022-02-24 01:14:37,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:37,177 INFO L225 Difference]: With dead ends: 4466 [2022-02-24 01:14:37,177 INFO L226 Difference]: Without dead ends: 4422 [2022-02-24 01:14:37,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:14:37,179 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 419 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3286 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:37,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [419 Valid, 285 Invalid, 3307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3286 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 01:14:37,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2022-02-24 01:14:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 973. [2022-02-24 01:14:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1590909090909092) internal successors, (1122), 968 states have internal predecessors, (1122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1126 transitions. [2022-02-24 01:14:38,533 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1126 transitions. Word has length 74 [2022-02-24 01:14:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:38,533 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1126 transitions. [2022-02-24 01:14:38,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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) [2022-02-24 01:14:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1126 transitions. [2022-02-24 01:14:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:14:38,535 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:38,535 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 5, 4, 4, 3, 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] [2022-02-24 01:14:38,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:14:38,536 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:38,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:38,536 INFO L85 PathProgramCache]: Analyzing trace with hash 583415094, now seen corresponding path program 18 times [2022-02-24 01:14:38,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:38,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916990835] [2022-02-24 01:14:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:38,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:38,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:38,539 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:38,539 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:38,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:38,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:38,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:38,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916990835] [2022-02-24 01:14:38,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [916990835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:38,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:38,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:14:38,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277680756] [2022-02-24 01:14:38,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:38,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:14:38,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:14:38,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:14:38,733 INFO L87 Difference]: Start difference. First operand 973 states and 1126 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:44,573 INFO L93 Difference]: Finished difference Result 3224 states and 3802 transitions. [2022-02-24 01:14:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:14:44,573 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-02-24 01:14:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:44,579 INFO L225 Difference]: With dead ends: 3224 [2022-02-24 01:14:44,579 INFO L226 Difference]: Without dead ends: 3149 [2022-02-24 01:14:44,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:14:44,580 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 339 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:44,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 194 Invalid, 1819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:14:44,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2022-02-24 01:14:45,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 973. [2022-02-24 01:14:45,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1590909090909092) internal successors, (1122), 968 states have internal predecessors, (1122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:45,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1126 transitions. [2022-02-24 01:14:45,910 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1126 transitions. Word has length 75 [2022-02-24 01:14:45,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:45,911 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1126 transitions. [2022-02-24 01:14:45,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:45,911 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1126 transitions. [2022-02-24 01:14:45,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:14:45,912 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:45,912 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:45,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:14:45,912 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:45,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:45,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1908734380, now seen corresponding path program 19 times [2022-02-24 01:14:45,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:45,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086875765] [2022-02-24 01:14:45,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:45,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:45,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:45,915 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:45,915 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:46,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:46,071 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:46,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086875765] [2022-02-24 01:14:46,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086875765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:46,071 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:46,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:14:46,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850175789] [2022-02-24 01:14:46,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:46,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:14:46,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:46,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:14:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:14:46,072 INFO L87 Difference]: Start difference. First operand 973 states and 1126 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) [2022-02-24 01:14:49,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:49,565 INFO L93 Difference]: Finished difference Result 2118 states and 2475 transitions. [2022-02-24 01:14:49,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:14:49,565 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 76 [2022-02-24 01:14:49,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:49,569 INFO L225 Difference]: With dead ends: 2118 [2022-02-24 01:14:49,569 INFO L226 Difference]: Without dead ends: 1965 [2022-02-24 01:14:49,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:14:49,570 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 274 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:49,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 99 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:49,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2022-02-24 01:14:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 973. [2022-02-24 01:14:50,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 968 states have (on average 1.1590909090909092) internal successors, (1122), 968 states have internal predecessors, (1122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:50,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 1126 transitions. [2022-02-24 01:14:50,925 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 1126 transitions. Word has length 76 [2022-02-24 01:14:50,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:50,926 INFO L470 AbstractCegarLoop]: Abstraction has 973 states and 1126 transitions. [2022-02-24 01:14:50,926 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) [2022-02-24 01:14:50,926 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 1126 transitions. [2022-02-24 01:14:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:14:50,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:50,928 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:50,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:14:50,930 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:50,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:50,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1780671001, now seen corresponding path program 8 times [2022-02-24 01:14:50,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:50,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585654835] [2022-02-24 01:14:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:50,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:50,933 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:50,933 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:50,933 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:51,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:51,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:51,152 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:51,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585654835] [2022-02-24 01:14:51,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [585654835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:51,152 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:51,152 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:14:51,152 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717678774] [2022-02-24 01:14:51,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:51,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:14:51,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:14:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:14:51,153 INFO L87 Difference]: Start difference. First operand 973 states and 1126 transitions. Second operand has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-24 01:15:01,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:01,218 INFO L93 Difference]: Finished difference Result 5206 states and 6186 transitions. [2022-02-24 01:15:01,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:15:01,218 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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 76 [2022-02-24 01:15:01,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:01,225 INFO L225 Difference]: With dead ends: 5206 [2022-02-24 01:15:01,225 INFO L226 Difference]: Without dead ends: 5162 [2022-02-24 01:15:01,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:15:01,226 INFO L933 BasicCegarLoop]: 237 mSDtfsCounter, 514 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4411 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 4442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:01,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 319 Invalid, 4442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4411 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 01:15:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5162 states. [2022-02-24 01:15:02,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5162 to 977. [2022-02-24 01:15:02,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:02,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-24 01:15:02,663 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 76 [2022-02-24 01:15:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:02,664 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-24 01:15:02,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 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) [2022-02-24 01:15:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-24 01:15:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 01:15:02,665 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:02,665 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 5, 4, 4, 3, 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] [2022-02-24 01:15:02,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:15:02,665 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:02,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:02,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1571229253, now seen corresponding path program 20 times [2022-02-24 01:15:02,665 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:02,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278417976] [2022-02-24 01:15:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:02,668 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:02,668 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:02,668 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:02,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:02,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:02,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:02,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:02,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:02,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278417976] [2022-02-24 01:15:02,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278417976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:02,873 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:02,873 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:15:02,873 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666689040] [2022-02-24 01:15:02,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:02,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:15:02,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:02,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:15:02,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:15:02,874 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:09,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:09,864 INFO L93 Difference]: Finished difference Result 3613 states and 4262 transitions. [2022-02-24 01:15:09,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:15:09,864 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-24 01:15:09,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:09,869 INFO L225 Difference]: With dead ends: 3613 [2022-02-24 01:15:09,869 INFO L226 Difference]: Without dead ends: 3538 [2022-02-24 01:15:09,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=718, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:15:09,870 INFO L933 BasicCegarLoop]: 156 mSDtfsCounter, 369 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 2272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:09,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 218 Invalid, 2272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:15:09,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2022-02-24 01:15:11,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 977. [2022-02-24 01:15:11,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:11,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-24 01:15:11,282 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 77 [2022-02-24 01:15:11,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:11,282 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-24 01:15:11,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:11,282 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-24 01:15:11,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:15:11,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:11,284 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:11,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:15:11,284 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:11,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:11,284 INFO L85 PathProgramCache]: Analyzing trace with hash -460730937, now seen corresponding path program 21 times [2022-02-24 01:15:11,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:11,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224191375] [2022-02-24 01:15:11,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:11,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:11,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:11,287 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:11,287 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:11,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:11,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:11,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224191375] [2022-02-24 01:15:11,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224191375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:11,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:11,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:15:11,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572075862] [2022-02-24 01:15:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:11,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:15:11,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:15:11,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:15:11,452 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-02-24 01:15:16,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:16,253 INFO L93 Difference]: Finished difference Result 2560 states and 2996 transitions. [2022-02-24 01:15:16,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:15:16,254 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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 78 [2022-02-24 01:15:16,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:16,258 INFO L225 Difference]: With dead ends: 2560 [2022-02-24 01:15:16,258 INFO L226 Difference]: Without dead ends: 2407 [2022-02-24 01:15:16,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:15:16,259 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 341 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:16,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 124 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:15:16,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-02-24 01:15:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 977. [2022-02-24 01:15:17,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-24 01:15:17,741 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 78 [2022-02-24 01:15:17,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:17,741 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-24 01:15:17,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 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) [2022-02-24 01:15:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-24 01:15:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 01:15:17,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:17,742 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 5, 4, 4, 3, 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] [2022-02-24 01:15:17,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:15:17,742 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:17,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:17,743 INFO L85 PathProgramCache]: Analyzing trace with hash -2010210048, now seen corresponding path program 22 times [2022-02-24 01:15:17,743 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:17,743 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987182517] [2022-02-24 01:15:17,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:17,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:17,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:17,745 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:17,745 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:17,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:17,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:17,983 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:17,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987182517] [2022-02-24 01:15:17,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987182517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:17,983 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:17,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:15:17,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42761749] [2022-02-24 01:15:17,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:17,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:15:17,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:17,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:15:17,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:15:17,984 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:26,033 INFO L93 Difference]: Finished difference Result 3998 states and 4716 transitions. [2022-02-24 01:15:26,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:15:26,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-24 01:15:26,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:26,040 INFO L225 Difference]: With dead ends: 3998 [2022-02-24 01:15:26,040 INFO L226 Difference]: Without dead ends: 3923 [2022-02-24 01:15:26,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:15:26,041 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 406 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:26,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 237 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2516 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:15:26,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3923 states. [2022-02-24 01:15:27,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3923 to 977. [2022-02-24 01:15:27,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-24 01:15:27,586 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 79 [2022-02-24 01:15:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:27,586 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-24 01:15:27,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-24 01:15:27,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 01:15:27,588 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:27,588 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:27,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:15:27,588 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:27,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:27,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1184233694, now seen corresponding path program 23 times [2022-02-24 01:15:27,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:27,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553158139] [2022-02-24 01:15:27,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:27,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:27,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:27,590 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:27,591 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:27,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:27,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:27,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:27,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553158139] [2022-02-24 01:15:27,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [553158139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:27,769 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:27,769 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:15:27,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26002148] [2022-02-24 01:15:27,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:27,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:15:27,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:27,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:15:27,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:15:27,770 INFO L87 Difference]: Start difference. First operand 977 states and 1132 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) [2022-02-24 01:15:33,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:33,389 INFO L93 Difference]: Finished difference Result 2902 states and 3399 transitions. [2022-02-24 01:15:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:15:33,390 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 80 [2022-02-24 01:15:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:33,395 INFO L225 Difference]: With dead ends: 2902 [2022-02-24 01:15:33,395 INFO L226 Difference]: Without dead ends: 2749 [2022-02-24 01:15:33,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:15:33,396 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 321 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:33,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 157 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:15:33,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2749 states. [2022-02-24 01:15:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2749 to 977. [2022-02-24 01:15:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 972 states have (on average 1.1604938271604939) internal successors, (1128), 972 states have internal predecessors, (1128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 1132 transitions. [2022-02-24 01:15:34,990 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 1132 transitions. Word has length 80 [2022-02-24 01:15:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:34,990 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 1132 transitions. [2022-02-24 01:15:34,990 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) [2022-02-24 01:15:34,991 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 1132 transitions. [2022-02-24 01:15:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 01:15:34,992 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:34,992 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 5, 5, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:34,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:15:34,993 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:34,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:34,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1312297073, now seen corresponding path program 9 times [2022-02-24 01:15:34,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:34,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430806039] [2022-02-24 01:15:34,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:34,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:34,996 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:34,996 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:34,996 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:35,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:35,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:35,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430806039] [2022-02-24 01:15:35,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [430806039] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:35,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:35,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:15:35,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885290490] [2022-02-24 01:15:35,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:35,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:15:35,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:15:35,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:15:35,304 INFO L87 Difference]: Start difference. First operand 977 states and 1132 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2022-02-24 01:15:48,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:48,675 INFO L93 Difference]: Finished difference Result 5980 states and 7100 transitions. [2022-02-24 01:15:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:15:48,675 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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 80 [2022-02-24 01:15:48,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:48,682 INFO L225 Difference]: With dead ends: 5980 [2022-02-24 01:15:48,682 INFO L226 Difference]: Without dead ends: 5936 [2022-02-24 01:15:48,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=1434, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:15:48,683 INFO L933 BasicCegarLoop]: 275 mSDtfsCounter, 600 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 5469 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 5504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:48,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 362 Invalid, 5504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5469 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 01:15:48,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5936 states. [2022-02-24 01:15:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5936 to 981. [2022-02-24 01:15:50,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 976 states have (on average 1.1618852459016393) internal successors, (1134), 976 states have internal predecessors, (1134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:50,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1138 transitions. [2022-02-24 01:15:50,203 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1138 transitions. Word has length 80 [2022-02-24 01:15:50,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:50,203 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 1138 transitions. [2022-02-24 01:15:50,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 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) [2022-02-24 01:15:50,203 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1138 transitions. [2022-02-24 01:15:50,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 01:15:50,205 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:50,205 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:50,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:15:50,205 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:50,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:50,205 INFO L85 PathProgramCache]: Analyzing trace with hash 598040280, now seen corresponding path program 24 times [2022-02-24 01:15:50,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:50,205 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482451552] [2022-02-24 01:15:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:50,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:50,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:50,207 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:50,207 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:50,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:50,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:50,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482451552] [2022-02-24 01:15:50,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [482451552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:50,320 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:50,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:15:50,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880762617] [2022-02-24 01:15:50,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:50,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:15:50,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:50,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:15:50,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:15:50,321 INFO L87 Difference]: Start difference. First operand 981 states and 1138 transitions. Second operand has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:51,867 INFO L93 Difference]: Finished difference Result 1238 states and 1420 transitions. [2022-02-24 01:15:51,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:15:51,867 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-24 01:15:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:51,868 INFO L225 Difference]: With dead ends: 1238 [2022-02-24 01:15:51,868 INFO L226 Difference]: Without dead ends: 717 [2022-02-24 01:15:51,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:15:51,869 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 110 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:51,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 71 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:15:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-24 01:15:52,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 656. [2022-02-24 01:15:52,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 651 states have (on average 1.1612903225806452) internal successors, (756), 651 states have internal predecessors, (756), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 760 transitions. [2022-02-24 01:15:52,928 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 760 transitions. Word has length 81 [2022-02-24 01:15:52,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:52,928 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 760 transitions. [2022-02-24 01:15:52,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.555555555555555) internal successors, (50), 8 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:52,928 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 760 transitions. [2022-02-24 01:15:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 01:15:52,929 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:52,929 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 5, 5, 4, 4, 3, 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] [2022-02-24 01:15:52,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 01:15:52,929 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:52,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1331008261, now seen corresponding path program 25 times [2022-02-24 01:15:52,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:52,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553418123] [2022-02-24 01:15:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:52,932 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:52,932 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:52,932 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:53,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:53,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:53,182 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:53,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553418123] [2022-02-24 01:15:53,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1553418123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:53,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:53,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:15:53,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249041452] [2022-02-24 01:15:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:53,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:15:53,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:15:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:15:53,183 INFO L87 Difference]: Start difference. First operand 656 states and 760 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:02,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:02,405 INFO L93 Difference]: Finished difference Result 4017 states and 4747 transitions. [2022-02-24 01:16:02,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:16:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:16:02,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:02,410 INFO L225 Difference]: With dead ends: 4017 [2022-02-24 01:16:02,411 INFO L226 Difference]: Without dead ends: 3942 [2022-02-24 01:16:02,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:16:02,411 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 441 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3227 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:02,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 266 Invalid, 3257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3227 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:16:02,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2022-02-24 01:16:03,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 656. [2022-02-24 01:16:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 651 states have (on average 1.1612903225806452) internal successors, (756), 651 states have internal predecessors, (756), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 760 transitions. [2022-02-24 01:16:03,564 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 760 transitions. Word has length 81 [2022-02-24 01:16:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:03,564 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 760 transitions. [2022-02-24 01:16:03,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:03,564 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 760 transitions. [2022-02-24 01:16:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 01:16:03,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:03,565 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:03,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 01:16:03,565 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:03,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1790824352, now seen corresponding path program 26 times [2022-02-24 01:16:03,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:03,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984357190] [2022-02-24 01:16:03,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:03,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:03,568 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:03,569 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:03,569 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:04,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:04,477 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:04,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984357190] [2022-02-24 01:16:04,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1984357190] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:04,478 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:04,478 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:16:04,478 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519326751] [2022-02-24 01:16:04,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:04,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:16:04,478 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:04,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:16:04,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:16:04,479 INFO L87 Difference]: Start difference. First operand 656 states and 760 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:06,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:06,253 INFO L93 Difference]: Finished difference Result 707 states and 815 transitions. [2022-02-24 01:16:06,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:16:06,253 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-24 01:16:06,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:06,254 INFO L225 Difference]: With dead ends: 707 [2022-02-24 01:16:06,254 INFO L226 Difference]: Without dead ends: 502 [2022-02-24 01:16:06,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=760, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:16:06,255 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 199 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:06,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 41 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:16:06,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-02-24 01:16:07,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 502. [2022-02-24 01:16:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 497 states have (on average 1.193158953722334) internal successors, (593), 497 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:07,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 597 transitions. [2022-02-24 01:16:07,130 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 597 transitions. Word has length 82 [2022-02-24 01:16:07,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:07,130 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 597 transitions. [2022-02-24 01:16:07,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 597 transitions. [2022-02-24 01:16:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 01:16:07,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:07,131 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:07,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 01:16:07,131 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash -685681219, now seen corresponding path program 27 times [2022-02-24 01:16:07,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:07,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [655953996] [2022-02-24 01:16:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:07,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:07,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:07,134 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:07,135 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:07,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:07,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:07,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:07,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:07,332 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:07,332 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [655953996] [2022-02-24 01:16:07,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [655953996] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:07,332 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:07,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:16:07,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228810756] [2022-02-24 01:16:07,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:07,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:16:07,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:07,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:16:07,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:16:07,333 INFO L87 Difference]: Start difference. First operand 502 states and 597 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-02-24 01:16:13,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:13,427 INFO L93 Difference]: Finished difference Result 2725 states and 3220 transitions. [2022-02-24 01:16:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:16:13,427 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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 82 [2022-02-24 01:16:13,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:13,430 INFO L225 Difference]: With dead ends: 2725 [2022-02-24 01:16:13,430 INFO L226 Difference]: Without dead ends: 2572 [2022-02-24 01:16:13,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:16:13,431 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 309 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1602 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:13,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [309 Valid, 165 Invalid, 1635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:16:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2572 states. [2022-02-24 01:16:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2572 to 502. [2022-02-24 01:16:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 497 states have (on average 1.193158953722334) internal successors, (593), 497 states have internal predecessors, (593), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:14,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 597 transitions. [2022-02-24 01:16:14,358 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 597 transitions. Word has length 82 [2022-02-24 01:16:14,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:14,358 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 597 transitions. [2022-02-24 01:16:14,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 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) [2022-02-24 01:16:14,359 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 597 transitions. [2022-02-24 01:16:14,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 01:16:14,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:14,360 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:14,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 01:16:14,360 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:14,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:14,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1126702179, now seen corresponding path program 28 times [2022-02-24 01:16:14,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:14,361 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637924590] [2022-02-24 01:16:14,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:14,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:14,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:14,364 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:14,364 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:14,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:14,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:14,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:14,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:14,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637924590] [2022-02-24 01:16:14,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [637924590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:14,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:14,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:16:14,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786853814] [2022-02-24 01:16:14,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:14,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:16:14,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:16:14,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:16:14,696 INFO L87 Difference]: Start difference. First operand 502 states and 597 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2022-02-24 01:16:16,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:16,700 INFO L93 Difference]: Finished difference Result 765 states and 905 transitions. [2022-02-24 01:16:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:16:16,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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 83 [2022-02-24 01:16:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:16,702 INFO L225 Difference]: With dead ends: 765 [2022-02-24 01:16:16,702 INFO L226 Difference]: Without dead ends: 760 [2022-02-24 01:16:16,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:16:16,702 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 171 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:16,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 73 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:16:16,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-02-24 01:16:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 555. [2022-02-24 01:16:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.1890909090909092) internal successors, (654), 550 states have internal predecessors, (654), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:17,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 658 transitions. [2022-02-24 01:16:17,846 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 658 transitions. Word has length 83 [2022-02-24 01:16:17,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:17,846 INFO L470 AbstractCegarLoop]: Abstraction has 555 states and 658 transitions. [2022-02-24 01:16:17,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 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) [2022-02-24 01:16:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 658 transitions. [2022-02-24 01:16:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:16:17,847 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:17,847 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:17,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 01:16:17,847 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:17,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:17,847 INFO L85 PathProgramCache]: Analyzing trace with hash 162728781, now seen corresponding path program 29 times [2022-02-24 01:16:17,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:17,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102247995] [2022-02-24 01:16:17,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:17,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:17,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:17,850 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:17,850 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:18,027 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:18,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102247995] [2022-02-24 01:16:18,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [102247995] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:18,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:18,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:16:18,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846699768] [2022-02-24 01:16:18,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:18,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:16:18,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:18,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:16:18,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:16:18,028 INFO L87 Difference]: Start difference. First operand 555 states and 658 transitions. Second operand has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:20,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:20,850 INFO L93 Difference]: Finished difference Result 910 states and 1069 transitions. [2022-02-24 01:16:20,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:16:20,850 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 01:16:20,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:20,852 INFO L225 Difference]: With dead ends: 910 [2022-02-24 01:16:20,852 INFO L226 Difference]: Without dead ends: 905 [2022-02-24 01:16:20,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:16:20,852 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 245 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 1353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:20,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 194 Invalid, 1353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:16:20,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-02-24 01:16:22,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 673. [2022-02-24 01:16:22,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 668 states have (on average 1.187125748502994) internal successors, (793), 668 states have internal predecessors, (793), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 797 transitions. [2022-02-24 01:16:22,301 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 797 transitions. Word has length 93 [2022-02-24 01:16:22,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:22,301 INFO L470 AbstractCegarLoop]: Abstraction has 673 states and 797 transitions. [2022-02-24 01:16:22,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.076923076923077) internal successors, (66), 11 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:22,301 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 797 transitions. [2022-02-24 01:16:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:16:22,302 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:22,302 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:22,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 01:16:22,303 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash -424077233, now seen corresponding path program 30 times [2022-02-24 01:16:22,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:22,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491309750] [2022-02-24 01:16:22,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:22,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:22,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:22,305 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:22,305 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:23,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:23,368 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:23,368 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491309750] [2022-02-24 01:16:23,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491309750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:23,368 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:23,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:16:23,368 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795765169] [2022-02-24 01:16:23,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:23,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:16:23,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:23,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:16:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:16:23,369 INFO L87 Difference]: Start difference. First operand 673 states and 797 transitions. Second operand has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-02-24 01:16:27,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:27,042 INFO L93 Difference]: Finished difference Result 1413 states and 1663 transitions. [2022-02-24 01:16:27,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:16:27,042 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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 93 [2022-02-24 01:16:27,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:27,044 INFO L225 Difference]: With dead ends: 1413 [2022-02-24 01:16:27,044 INFO L226 Difference]: Without dead ends: 1346 [2022-02-24 01:16:27,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:16:27,045 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 268 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:27,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 83 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:16:27,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2022-02-24 01:16:29,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1057. [2022-02-24 01:16:29,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1052 states have (on average 1.1920152091254752) internal successors, (1254), 1052 states have internal predecessors, (1254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:29,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1258 transitions. [2022-02-24 01:16:29,432 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1258 transitions. Word has length 93 [2022-02-24 01:16:29,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:29,432 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 1258 transitions. [2022-02-24 01:16:29,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.466666666666667) internal successors, (67), 14 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) [2022-02-24 01:16:29,432 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1258 transitions. [2022-02-24 01:16:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:16:29,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:29,434 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:29,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 01:16:29,434 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash 221262611, now seen corresponding path program 31 times [2022-02-24 01:16:29,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:29,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249556968] [2022-02-24 01:16:29,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:29,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:29,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:29,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:29,437 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:31,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:31,096 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:31,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249556968] [2022-02-24 01:16:31,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [249556968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:31,096 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:31,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:16:31,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885250191] [2022-02-24 01:16:31,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:31,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:16:31,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:31,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:16:31,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:16:31,097 INFO L87 Difference]: Start difference. First operand 1057 states and 1258 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) [2022-02-24 01:16:38,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:38,787 INFO L93 Difference]: Finished difference Result 2650 states and 3127 transitions. [2022-02-24 01:16:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:16:38,788 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 93 [2022-02-24 01:16:38,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:38,790 INFO L225 Difference]: With dead ends: 2650 [2022-02-24 01:16:38,790 INFO L226 Difference]: Without dead ends: 2571 [2022-02-24 01:16:38,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:16:38,791 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 263 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:38,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 99 Invalid, 1268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:16:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2022-02-24 01:16:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 1513. [2022-02-24 01:16:42,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1508 states have (on average 1.1883289124668435) internal successors, (1792), 1508 states have internal predecessors, (1792), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:42,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 1796 transitions. [2022-02-24 01:16:42,406 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 1796 transitions. Word has length 93 [2022-02-24 01:16:42,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:42,406 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 1796 transitions. [2022-02-24 01:16:42,406 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) [2022-02-24 01:16:42,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 1796 transitions. [2022-02-24 01:16:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:16:42,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:42,408 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:42,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 01:16:42,408 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:42,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1056215119, now seen corresponding path program 32 times [2022-02-24 01:16:42,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:42,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284221104] [2022-02-24 01:16:42,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:42,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:42,412 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:42,412 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:42,412 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:43,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:43,749 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:43,749 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284221104] [2022-02-24 01:16:43,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284221104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:43,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:43,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:16:43,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88238344] [2022-02-24 01:16:43,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:43,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:16:43,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:43,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:16:43,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:16:43,751 INFO L87 Difference]: Start difference. First operand 1513 states and 1796 transitions. Second operand has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:51,579 INFO L93 Difference]: Finished difference Result 2655 states and 3131 transitions. [2022-02-24 01:16:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:16:51,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 01:16:51,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:51,582 INFO L225 Difference]: With dead ends: 2655 [2022-02-24 01:16:51,582 INFO L226 Difference]: Without dead ends: 2598 [2022-02-24 01:16:51,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=316, Invalid=1406, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 01:16:51,583 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 276 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:51,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 103 Invalid, 1415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:16:51,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2598 states. [2022-02-24 01:16:56,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2598 to 1946. [2022-02-24 01:16:56,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1946 states, 1941 states have (on average 1.1854714064914993) internal successors, (2301), 1941 states have internal predecessors, (2301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:56,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1946 states to 1946 states and 2305 transitions. [2022-02-24 01:16:56,315 INFO L78 Accepts]: Start accepts. Automaton has 1946 states and 2305 transitions. Word has length 93 [2022-02-24 01:16:56,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:56,315 INFO L470 AbstractCegarLoop]: Abstraction has 1946 states and 2305 transitions. [2022-02-24 01:16:56,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.130434782608696) internal successors, (72), 22 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:56,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1946 states and 2305 transitions. [2022-02-24 01:16:56,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:16:56,318 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:56,318 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:56,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 01:16:56,318 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:56,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:56,318 INFO L85 PathProgramCache]: Analyzing trace with hash 862436115, now seen corresponding path program 33 times [2022-02-24 01:16:56,319 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:56,319 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051199674] [2022-02-24 01:16:56,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:56,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:56,321 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:56,321 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:56,321 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:56,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:57,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:57,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:57,947 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:57,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051199674] [2022-02-24 01:16:57,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2051199674] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:57,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:57,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:16:57,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947859309] [2022-02-24 01:16:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:57,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:16:57,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:57,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:16:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:16:57,948 INFO L87 Difference]: Start difference. First operand 1946 states and 2305 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) [2022-02-24 01:17:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:05,370 INFO L93 Difference]: Finished difference Result 2589 states and 3046 transitions. [2022-02-24 01:17:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:17:05,370 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 93 [2022-02-24 01:17:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:05,373 INFO L225 Difference]: With dead ends: 2589 [2022-02-24 01:17:05,373 INFO L226 Difference]: Without dead ends: 2535 [2022-02-24 01:17:05,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=1640, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:17:05,374 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 311 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:05,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 98 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:17:05,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2535 states. [2022-02-24 01:17:10,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2535 to 1949. [2022-02-24 01:17:10,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1949 states, 1944 states have (on average 1.1851851851851851) internal successors, (2304), 1944 states have internal predecessors, (2304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:10,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2308 transitions. [2022-02-24 01:17:10,043 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2308 transitions. Word has length 93 [2022-02-24 01:17:10,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:10,044 INFO L470 AbstractCegarLoop]: Abstraction has 1949 states and 2308 transitions. [2022-02-24 01:17:10,044 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) [2022-02-24 01:17:10,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2308 transitions. [2022-02-24 01:17:10,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:17:10,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:10,046 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:10,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 01:17:10,046 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:10,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:10,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1261895563, now seen corresponding path program 34 times [2022-02-24 01:17:10,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:10,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253508073] [2022-02-24 01:17:10,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:10,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:10,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:10,049 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:11,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:11,482 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:11,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253508073] [2022-02-24 01:17:11,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253508073] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:11,482 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:11,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:17:11,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833462727] [2022-02-24 01:17:11,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:11,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:17:11,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:17:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:17:11,483 INFO L87 Difference]: Start difference. First operand 1949 states and 2308 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) [2022-02-24 01:17:20,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:20,095 INFO L93 Difference]: Finished difference Result 3161 states and 3715 transitions. [2022-02-24 01:17:20,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:17:20,096 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 93 [2022-02-24 01:17:20,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:20,098 INFO L225 Difference]: With dead ends: 3161 [2022-02-24 01:17:20,099 INFO L226 Difference]: Without dead ends: 2958 [2022-02-24 01:17:20,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=312, Invalid=1328, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:17:20,099 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 207 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:20,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 71 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:17:20,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2958 states. [2022-02-24 01:17:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2958 to 2386. [2022-02-24 01:17:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2386 states, 2381 states have (on average 1.1818563628727425) internal successors, (2814), 2381 states have internal predecessors, (2814), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2386 states to 2386 states and 2818 transitions. [2022-02-24 01:17:25,740 INFO L78 Accepts]: Start accepts. Automaton has 2386 states and 2818 transitions. Word has length 93 [2022-02-24 01:17:25,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:25,741 INFO L470 AbstractCegarLoop]: Abstraction has 2386 states and 2818 transitions. [2022-02-24 01:17:25,741 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) [2022-02-24 01:17:25,741 INFO L276 IsEmpty]: Start isEmpty. Operand 2386 states and 2818 transitions. [2022-02-24 01:17:25,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:17:25,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:25,744 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:25,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 01:17:25,744 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:25,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:25,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1038747787, now seen corresponding path program 35 times [2022-02-24 01:17:25,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:25,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1091743572] [2022-02-24 01:17:25,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:25,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:25,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:25,747 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:25,747 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:26,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:26,860 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:26,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1091743572] [2022-02-24 01:17:26,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1091743572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:26,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:26,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:17:26,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319817712] [2022-02-24 01:17:26,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:26,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:17:26,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:26,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:17:26,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:17:26,862 INFO L87 Difference]: Start difference. First operand 2386 states and 2818 transitions. Second operand has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:34,853 INFO L93 Difference]: Finished difference Result 3085 states and 3610 transitions. [2022-02-24 01:17:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:17:34,854 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 01:17:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:34,857 INFO L225 Difference]: With dead ends: 3085 [2022-02-24 01:17:34,857 INFO L226 Difference]: Without dead ends: 2919 [2022-02-24 01:17:34,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=1004, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:17:34,858 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 212 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:34,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 77 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:17:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2022-02-24 01:17:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2554. [2022-02-24 01:17:40,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2549 states have (on average 1.1777167516673206) internal successors, (3002), 2549 states have internal predecessors, (3002), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:40,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 3006 transitions. [2022-02-24 01:17:40,943 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 3006 transitions. Word has length 93 [2022-02-24 01:17:40,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:40,944 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 3006 transitions. [2022-02-24 01:17:40,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.3) internal successors, (66), 19 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:40,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 3006 transitions. [2022-02-24 01:17:40,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:17:40,947 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:40,947 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:40,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 01:17:40,947 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:40,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:40,947 INFO L85 PathProgramCache]: Analyzing trace with hash 50957903, now seen corresponding path program 36 times [2022-02-24 01:17:40,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:40,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857789883] [2022-02-24 01:17:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:40,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:40,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:40,950 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:40,950 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:42,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:42,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:42,164 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:42,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857789883] [2022-02-24 01:17:42,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857789883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:42,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:42,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:17:42,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916356760] [2022-02-24 01:17:42,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:42,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:17:42,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:42,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:17:42,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:17:42,165 INFO L87 Difference]: Start difference. First operand 2554 states and 3006 transitions. Second operand has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:50,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:50,437 INFO L93 Difference]: Finished difference Result 3273 states and 3821 transitions. [2022-02-24 01:17:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:17:50,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 01:17:50,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:50,440 INFO L225 Difference]: With dead ends: 3273 [2022-02-24 01:17:50,440 INFO L226 Difference]: Without dead ends: 3122 [2022-02-24 01:17:50,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:17:50,441 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 202 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:50,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 87 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:17:50,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3122 states. [2022-02-24 01:17:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3122 to 2865. [2022-02-24 01:17:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2865 states, 2860 states have (on average 1.1772727272727272) internal successors, (3367), 2860 states have internal predecessors, (3367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:57,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 3371 transitions. [2022-02-24 01:17:57,193 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 3371 transitions. Word has length 93 [2022-02-24 01:17:57,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:57,193 INFO L470 AbstractCegarLoop]: Abstraction has 2865 states and 3371 transitions. [2022-02-24 01:17:57,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.0) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:57,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 3371 transitions. [2022-02-24 01:17:57,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:17:57,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:57,197 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:57,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 01:17:57,197 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:57,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:57,197 INFO L85 PathProgramCache]: Analyzing trace with hash -528878317, now seen corresponding path program 37 times [2022-02-24 01:17:57,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:57,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203703632] [2022-02-24 01:17:57,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:57,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:57,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:57,199 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:57,199 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:57,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:58,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:58,307 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:58,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203703632] [2022-02-24 01:17:58,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203703632] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:58,307 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:58,307 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:17:58,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40425958] [2022-02-24 01:17:58,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:58,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:17:58,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:58,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:17:58,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:17:58,308 INFO L87 Difference]: Start difference. First operand 2865 states and 3371 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:09,185 INFO L93 Difference]: Finished difference Result 4447 states and 5132 transitions. [2022-02-24 01:18:09,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:18:09,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:18:09,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:09,189 INFO L225 Difference]: With dead ends: 4447 [2022-02-24 01:18:09,189 INFO L226 Difference]: Without dead ends: 3902 [2022-02-24 01:18:09,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=940, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:18:09,191 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 180 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:09,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 63 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:18:09,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-02-24 01:18:16,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3327. [2022-02-24 01:18:16,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3322 states have (on average 1.1742925948223961) internal successors, (3901), 3322 states have internal predecessors, (3901), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 3905 transitions. [2022-02-24 01:18:16,775 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 3905 transitions. Word has length 93 [2022-02-24 01:18:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:16,776 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 3905 transitions. [2022-02-24 01:18:16,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 3905 transitions. [2022-02-24 01:18:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:18:16,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:16,780 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:16,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 01:18:16,780 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:16,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:16,780 INFO L85 PathProgramCache]: Analyzing trace with hash -254667825, now seen corresponding path program 38 times [2022-02-24 01:18:16,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:16,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983928181] [2022-02-24 01:18:16,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:16,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:16,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:16,783 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:16,783 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:17,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:17,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:17,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983928181] [2022-02-24 01:18:17,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983928181] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:17,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:17,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:18:17,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654984868] [2022-02-24 01:18:17,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:17,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:18:17,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:17,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:18:17,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:18:17,614 INFO L87 Difference]: Start difference. First operand 3327 states and 3905 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-02-24 01:18:27,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:27,832 INFO L93 Difference]: Finished difference Result 4329 states and 4963 transitions. [2022-02-24 01:18:27,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:18:27,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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 93 [2022-02-24 01:18:27,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:27,837 INFO L225 Difference]: With dead ends: 4329 [2022-02-24 01:18:27,837 INFO L226 Difference]: Without dead ends: 3902 [2022-02-24 01:18:27,838 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:18:27,838 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:27,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 75 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:18:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2022-02-24 01:18:35,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 3378. [2022-02-24 01:18:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3373 states have (on average 1.1654313667358434) internal successors, (3931), 3373 states have internal predecessors, (3931), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:35,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 3935 transitions. [2022-02-24 01:18:35,456 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 3935 transitions. Word has length 93 [2022-02-24 01:18:35,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:35,456 INFO L470 AbstractCegarLoop]: Abstraction has 3378 states and 3935 transitions. [2022-02-24 01:18:35,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 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) [2022-02-24 01:18:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 3935 transitions. [2022-02-24 01:18:35,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:18:35,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:35,460 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:35,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 01:18:35,461 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:35,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:35,461 INFO L85 PathProgramCache]: Analyzing trace with hash -349686637, now seen corresponding path program 39 times [2022-02-24 01:18:35,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:35,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920279370] [2022-02-24 01:18:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:35,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:35,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:35,464 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:35,464 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:35,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:36,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:36,435 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:36,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920279370] [2022-02-24 01:18:36,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920279370] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:36,435 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:36,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:18:36,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558930910] [2022-02-24 01:18:36,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:36,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:18:36,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:36,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:18:36,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:18:36,436 INFO L87 Difference]: Start difference. First operand 3378 states and 3935 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2022-02-24 01:18:47,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:47,452 INFO L93 Difference]: Finished difference Result 4878 states and 5594 transitions. [2022-02-24 01:18:47,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:18:47,452 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 93 [2022-02-24 01:18:47,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:47,457 INFO L225 Difference]: With dead ends: 4878 [2022-02-24 01:18:47,457 INFO L226 Difference]: Without dead ends: 4366 [2022-02-24 01:18:47,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:18:47,458 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 174 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:47,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 44 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2022-02-24 01:18:55,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3605. [2022-02-24 01:18:55,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3600 states have (on average 1.1647222222222222) internal successors, (4193), 3600 states have internal predecessors, (4193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:55,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 4197 transitions. [2022-02-24 01:18:55,653 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 4197 transitions. Word has length 93 [2022-02-24 01:18:55,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:55,653 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 4197 transitions. [2022-02-24 01:18:55,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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) [2022-02-24 01:18:55,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 4197 transitions. [2022-02-24 01:18:55,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:18:55,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:55,657 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 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] [2022-02-24 01:18:55,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 01:18:55,657 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:55,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:55,657 INFO L85 PathProgramCache]: Analyzing trace with hash -102388934, now seen corresponding path program 40 times [2022-02-24 01:18:55,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:55,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11019992] [2022-02-24 01:18:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:55,660 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:55,660 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:55,660 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:55,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:55,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:55,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11019992] [2022-02-24 01:18:55,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [11019992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:55,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:55,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:18:55,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280913430] [2022-02-24 01:18:55,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:55,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:18:55,910 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:55,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:18:55,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:18:55,910 INFO L87 Difference]: Start difference. First operand 3605 states and 4197 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:37,323 INFO L93 Difference]: Finished difference Result 17225 states and 20465 transitions. [2022-02-24 01:19:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:19:37,323 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 01:19:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:37,345 INFO L225 Difference]: With dead ends: 17225 [2022-02-24 01:19:37,345 INFO L226 Difference]: Without dead ends: 17117 [2022-02-24 01:19:37,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:19:37,350 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 437 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3288 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 3318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:37,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 266 Invalid, 3318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3288 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:19:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17117 states. [2022-02-24 01:19:45,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17117 to 3605. [2022-02-24 01:19:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3600 states have (on average 1.1647222222222222) internal successors, (4193), 3600 states have internal predecessors, (4193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:45,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 4197 transitions. [2022-02-24 01:19:45,818 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 4197 transitions. Word has length 93 [2022-02-24 01:19:45,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:45,818 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 4197 transitions. [2022-02-24 01:19:45,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 17 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:45,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 4197 transitions. [2022-02-24 01:19:45,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 01:19:45,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:45,822 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:45,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 01:19:45,823 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:45,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:45,823 INFO L85 PathProgramCache]: Analyzing trace with hash -291944894, now seen corresponding path program 41 times [2022-02-24 01:19:45,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:45,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366999635] [2022-02-24 01:19:45,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:45,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:45,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:45,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:45,825 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:46,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:46,016 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:46,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366999635] [2022-02-24 01:19:46,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [366999635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:46,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:46,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:19:46,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861941857] [2022-02-24 01:19:46,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:46,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:19:46,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:46,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:19:46,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:19:46,017 INFO L87 Difference]: Start difference. First operand 3605 states and 4197 transitions. Second operand has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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) [2022-02-24 01:20:14,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:14,625 INFO L93 Difference]: Finished difference Result 11576 states and 13666 transitions. [2022-02-24 01:20:14,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:20:14,626 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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 94 [2022-02-24 01:20:14,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:14,638 INFO L225 Difference]: With dead ends: 11576 [2022-02-24 01:20:14,638 INFO L226 Difference]: Without dead ends: 11357 [2022-02-24 01:20:14,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:20:14,641 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 414 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1766 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 1810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:14,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 177 Invalid, 1810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1766 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:20:14,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11357 states. [2022-02-24 01:20:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11357 to 3605. [2022-02-24 01:20:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3600 states have (on average 1.1647222222222222) internal successors, (4193), 3600 states have internal predecessors, (4193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:23,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 4197 transitions. [2022-02-24 01:20:23,146 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 4197 transitions. Word has length 94 [2022-02-24 01:20:23,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:23,147 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 4197 transitions. [2022-02-24 01:20:23,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.4375) internal successors, (55), 15 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) [2022-02-24 01:20:23,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 4197 transitions. [2022-02-24 01:20:23,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 01:20:23,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:23,150 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:23,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 01:20:23,151 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash 955226037, now seen corresponding path program 10 times [2022-02-24 01:20:23,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:23,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585293771] [2022-02-24 01:20:23,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:23,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:23,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:23,153 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:23,153 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:23,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:23,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:23,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585293771] [2022-02-24 01:20:23,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585293771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:23,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:23,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:20:23,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609208262] [2022-02-24 01:20:23,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:23,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:20:23,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:23,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:20:23,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:20:23,460 INFO L87 Difference]: Start difference. First operand 3605 states and 4197 transitions. Second operand has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-24 01:21:27,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:27,469 INFO L93 Difference]: Finished difference Result 24709 states and 29438 transitions. [2022-02-24 01:21:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:21:27,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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 94 [2022-02-24 01:21:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:27,503 INFO L225 Difference]: With dead ends: 24709 [2022-02-24 01:21:27,504 INFO L226 Difference]: Without dead ends: 24642 [2022-02-24 01:21:27,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=120, Invalid=1520, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:21:27,510 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 551 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 6236 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 6263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 6236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:27,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [551 Valid, 386 Invalid, 6263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 6236 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 01:21:27,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24642 states. [2022-02-24 01:21:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24642 to 3607. [2022-02-24 01:21:36,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3607 states, 3602 states have (on average 1.1649083842309829) internal successors, (4196), 3602 states have internal predecessors, (4196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:36,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3607 states to 3607 states and 4200 transitions. [2022-02-24 01:21:36,472 INFO L78 Accepts]: Start accepts. Automaton has 3607 states and 4200 transitions. Word has length 94 [2022-02-24 01:21:36,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:36,472 INFO L470 AbstractCegarLoop]: Abstraction has 3607 states and 4200 transitions. [2022-02-24 01:21:36,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.6818181818181817) internal successors, (59), 21 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) [2022-02-24 01:21:36,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3607 states and 4200 transitions. [2022-02-24 01:21:36,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 01:21:36,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:36,476 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:36,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 01:21:36,476 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash -2054113192, now seen corresponding path program 42 times [2022-02-24 01:21:36,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:36,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161150535] [2022-02-24 01:21:36,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:36,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:36,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:36,479 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:36,479 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:36,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:36,640 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:36,640 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161150535] [2022-02-24 01:21:36,640 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [161150535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:36,640 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:36,640 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:21:36,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561542277] [2022-02-24 01:21:36,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:36,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:21:36,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:21:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:21:36,641 INFO L87 Difference]: Start difference. First operand 3607 states and 4200 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:51,986 INFO L93 Difference]: Finished difference Result 6382 states and 7456 transitions. [2022-02-24 01:21:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:21:51,986 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:21:51,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:51,992 INFO L225 Difference]: With dead ends: 6382 [2022-02-24 01:21:51,992 INFO L226 Difference]: Without dead ends: 5888 [2022-02-24 01:21:51,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:21:51,994 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 244 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:51,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 109 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:21:51,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5888 states. [2022-02-24 01:22:01,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5888 to 3869. [2022-02-24 01:22:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3864 states have (on average 1.160455486542443) internal successors, (4484), 3864 states have internal predecessors, (4484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:01,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 4488 transitions. [2022-02-24 01:22:01,312 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 4488 transitions. Word has length 95 [2022-02-24 01:22:01,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:01,312 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 4488 transitions. [2022-02-24 01:22:01,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:01,312 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 4488 transitions. [2022-02-24 01:22:01,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 01:22:01,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:01,317 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 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] [2022-02-24 01:22:01,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 01:22:01,317 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:01,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:01,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1917202559, now seen corresponding path program 43 times [2022-02-24 01:22:01,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:01,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893083736] [2022-02-24 01:22:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:01,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:01,320 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:01,320 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:01,320 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:01,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:01,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:01,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893083736] [2022-02-24 01:22:01,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1893083736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:01,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:01,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:22:01,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88334297] [2022-02-24 01:22:01,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:01,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:22:01,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:01,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:22:01,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:22:01,581 INFO L87 Difference]: Start difference. First operand 3869 states and 4488 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:52,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:52,036 INFO L93 Difference]: Finished difference Result 18853 states and 22389 transitions. [2022-02-24 01:22:52,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:22:52,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:22:52,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:52,060 INFO L225 Difference]: With dead ends: 18853 [2022-02-24 01:22:52,060 INFO L226 Difference]: Without dead ends: 18745 [2022-02-24 01:22:52,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:22:52,064 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 460 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 4096 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:52,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 295 Invalid, 4126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4096 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 01:22:52,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18745 states. [2022-02-24 01:23:01,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18745 to 3869. [2022-02-24 01:23:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3864 states have (on average 1.160455486542443) internal successors, (4484), 3864 states have internal predecessors, (4484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 4488 transitions. [2022-02-24 01:23:01,574 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 4488 transitions. Word has length 95 [2022-02-24 01:23:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:01,574 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 4488 transitions. [2022-02-24 01:23:01,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 18 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:01,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 4488 transitions. [2022-02-24 01:23:01,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 01:23:01,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:01,578 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 6, 6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:01,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 01:23:01,578 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:01,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:01,578 INFO L85 PathProgramCache]: Analyzing trace with hash -2109118051, now seen corresponding path program 44 times [2022-02-24 01:23:01,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:01,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529817325] [2022-02-24 01:23:01,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:01,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:01,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:01,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:01,581 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:01,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:01,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:01,821 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:01,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529817325] [2022-02-24 01:23:01,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [529817325] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:01,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:01,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:23:01,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257040363] [2022-02-24 01:23:01,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:01,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:23:01,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:01,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:23:01,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:23:01,822 INFO L87 Difference]: Start difference. First operand 3869 states and 4488 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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) [2022-02-24 01:23:37,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:37,019 INFO L93 Difference]: Finished difference Result 13194 states and 15580 transitions. [2022-02-24 01:23:37,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:23:37,020 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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 96 [2022-02-24 01:23:37,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:37,036 INFO L225 Difference]: With dead ends: 13194 [2022-02-24 01:23:37,036 INFO L226 Difference]: Without dead ends: 12975 [2022-02-24 01:23:37,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:23:37,039 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 380 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:37,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 205 Invalid, 2254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:23:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12975 states. [2022-02-24 01:23:46,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12975 to 3869. [2022-02-24 01:23:46,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3864 states have (on average 1.160455486542443) internal successors, (4484), 3864 states have internal predecessors, (4484), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 4488 transitions. [2022-02-24 01:23:46,622 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 4488 transitions. Word has length 96 [2022-02-24 01:23:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:46,622 INFO L470 AbstractCegarLoop]: Abstraction has 3869 states and 4488 transitions. [2022-02-24 01:23:46,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 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) [2022-02-24 01:23:46,623 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 4488 transitions. [2022-02-24 01:23:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 01:23:46,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:46,626 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:46,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 01:23:46,626 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:46,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash -861947120, now seen corresponding path program 11 times [2022-02-24 01:23:46,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:46,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233644240] [2022-02-24 01:23:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:46,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:46,629 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:46,629 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:46,629 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:46,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:46,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:46,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:46,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233644240] [2022-02-24 01:23:46,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1233644240] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:46,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:46,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:23:46,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131821176] [2022-02-24 01:23:46,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:46,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:23:46,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:46,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:23:46,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:23:46,982 INFO L87 Difference]: Start difference. First operand 3869 states and 4488 transitions. Second operand has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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) [2022-02-24 01:25:05,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:05,575 INFO L93 Difference]: Finished difference Result 27858 states and 33186 transitions. [2022-02-24 01:25:05,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:25:05,576 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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 96 [2022-02-24 01:25:05,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:05,616 INFO L225 Difference]: With dead ends: 27858 [2022-02-24 01:25:05,616 INFO L226 Difference]: Without dead ends: 27791 [2022-02-24 01:25:05,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=144, Invalid=1926, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 01:25:05,624 INFO L933 BasicCegarLoop]: 313 mSDtfsCounter, 703 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 7038 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 703 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 7078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 7038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:05,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [703 Valid, 410 Invalid, 7078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 7038 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 01:25:05,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27791 states. [2022-02-24 01:25:15,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27791 to 3873. [2022-02-24 01:25:15,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3868 states have (on average 1.1608066184074457) internal successors, (4490), 3868 states have internal predecessors, (4490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:15,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 4494 transitions. [2022-02-24 01:25:15,613 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 4494 transitions. Word has length 96 [2022-02-24 01:25:15,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:15,613 INFO L470 AbstractCegarLoop]: Abstraction has 3873 states and 4494 transitions. [2022-02-24 01:25:15,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5416666666666665) internal successors, (61), 23 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) [2022-02-24 01:25:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 4494 transitions. [2022-02-24 01:25:15,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 01:25:15,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:15,617 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:15,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 01:25:15,617 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:15,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1743061085, now seen corresponding path program 45 times [2022-02-24 01:25:15,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:15,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656113414] [2022-02-24 01:25:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:15,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:15,620 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:15,620 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:15,620 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:15,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:15,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:15,778 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:15,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656113414] [2022-02-24 01:25:15,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656113414] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:15,779 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:15,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:25:15,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452325236] [2022-02-24 01:25:15,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:15,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:25:15,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:15,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:25:15,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:25:15,779 INFO L87 Difference]: Start difference. First operand 3873 states and 4494 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:37,161 INFO L93 Difference]: Finished difference Result 8032 states and 9403 transitions. [2022-02-24 01:25:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:25:37,162 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-24 01:25:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:37,169 INFO L225 Difference]: With dead ends: 8032 [2022-02-24 01:25:37,169 INFO L226 Difference]: Without dead ends: 7538 [2022-02-24 01:25:37,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:25:37,171 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 362 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:37,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 128 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:25:37,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2022-02-24 01:25:47,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 3873. [2022-02-24 01:25:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3873 states, 3868 states have (on average 1.1608066184074457) internal successors, (4490), 3868 states have internal predecessors, (4490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:47,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3873 states to 3873 states and 4494 transitions. [2022-02-24 01:25:47,029 INFO L78 Accepts]: Start accepts. Automaton has 3873 states and 4494 transitions. Word has length 97 [2022-02-24 01:25:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:47,030 INFO L470 AbstractCegarLoop]: Abstraction has 3873 states and 4494 transitions. [2022-02-24 01:25:47,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:47,030 INFO L276 IsEmpty]: Start isEmpty. Operand 3873 states and 4494 transitions. [2022-02-24 01:25:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 01:25:47,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:47,033 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 6, 6, 5, 5, 4, 3, 3, 3, 3, 3, 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] [2022-02-24 01:25:47,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 01:25:47,033 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:47,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:47,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1419409540, now seen corresponding path program 46 times [2022-02-24 01:25:47,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:47,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863459175] [2022-02-24 01:25:47,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:47,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:47,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:47,036 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:47,036 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:47,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:47,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:47,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:47,305 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:47,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863459175] [2022-02-24 01:25:47,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [863459175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:47,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:47,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:25:47,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107053897] [2022-02-24 01:25:47,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:25:47,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:47,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:25:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:25:47,306 INFO L87 Difference]: Start difference. First operand 3873 states and 4494 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:46,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:26:46,733 INFO L93 Difference]: Finished difference Result 20483 states and 24316 transitions. [2022-02-24 01:26:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:26:46,733 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 19 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-24 01:26:46,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:26:46,756 INFO L225 Difference]: With dead ends: 20483 [2022-02-24 01:26:46,757 INFO L226 Difference]: Without dead ends: 20375 [2022-02-24 01:26:46,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:26:46,760 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 501 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4736 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 4768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:26:46,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 319 Invalid, 4768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4736 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 01:26:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20375 states.