/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:40:12,030 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:40:12,032 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:40:12,066 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:40:12,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:40:12,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:40:12,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:40:12,100 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:40:12,107 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:40:12,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:40:12,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:40:12,108 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:40:12,108 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:40:12,108 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:40:12,108 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:40:12,109 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:40:12,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:40:12,110 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:40:12,110 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:40:12,110 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:40:12,110 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:40:12,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:40:12,327 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:40:12,358 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:40:12,360 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:40:12,360 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:40:12,363 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:40:12,364 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/in-de61.c [2022-02-24 03:40:12,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6162d70e4/dc969a7eefbc4c45b59109feffcccaf9/FLAGed7114855 [2022-02-24 03:40:12,774 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:40:12,775 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/in-de61.c [2022-02-24 03:40:12,780 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6162d70e4/dc969a7eefbc4c45b59109feffcccaf9/FLAGed7114855 [2022-02-24 03:40:12,796 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6162d70e4/dc969a7eefbc4c45b59109feffcccaf9 [2022-02-24 03:40:12,799 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:40:12,800 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:40:12,801 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:40:12,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:40:12,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:40:12,804 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:40:12" (1/1) ... [2022-02-24 03:40:12,806 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d969a1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:12, skipping insertion in model container [2022-02-24 03:40:12,806 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:40:12" (1/1) ... [2022-02-24 03:40:12,811 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:40:12,822 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:40:12,956 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-crafted-1/in-de61.c[368,381] [2022-02-24 03:40:12,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:40:12,981 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:40:13,001 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-crafted-1/in-de61.c[368,381] [2022-02-24 03:40:13,016 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:40:13,026 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:40:13,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13 WrapperNode [2022-02-24 03:40:13,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:40:13,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:40:13,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:40:13,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:40:13,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,040 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,058 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,064 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,069 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:40:13,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:40:13,070 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:40:13,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:40:13,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (1/1) ... [2022-02-24 03:40:13,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:40:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:40:13,097 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 03:40:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:40:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:40:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:40:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:40:13,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:40:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:40:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:40:13,126 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:40:13,127 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:40:13,114 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 03:40:13,182 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:40:13,183 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:40:13,294 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:40:13,298 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:40:13,298 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-24 03:40:13,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:40:13 BoogieIcfgContainer [2022-02-24 03:40:13,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:40:13,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:40:13,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:40:13,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:40:13,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:40:12" (1/3) ... [2022-02-24 03:40:13,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc476d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:40:13, skipping insertion in model container [2022-02-24 03:40:13,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:40:13" (2/3) ... [2022-02-24 03:40:13,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bc476d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:40:13, skipping insertion in model container [2022-02-24 03:40:13,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:40:13" (3/3) ... [2022-02-24 03:40:13,306 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de61.c [2022-02-24 03:40:13,310 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:40:13,310 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:40:13,345 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:40:13,362 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=QVASR [2022-02-24 03:40:13,362 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:40:13,381 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 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 03:40:13,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:40:13,388 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:13,388 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:13,389 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:13,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:13,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1370249117, now seen corresponding path program 1 times [2022-02-24 03:40:13,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:13,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767360565] [2022-02-24 03:40:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:13,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:13,454 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:40:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:13,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:13,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:13,590 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 03:40:13,591 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:13,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767360565] [2022-02-24 03:40:13,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767360565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:13,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:13,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:40:13,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668021591] [2022-02-24 03:40:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:13,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:40:13,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:13,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:40:13,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:40:13,623 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 18 states have internal predecessors, (31), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 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 03:40:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:13,675 INFO L93 Difference]: Finished difference Result 43 states and 66 transitions. [2022-02-24 03:40:13,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:40:13,677 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:40:13,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:13,681 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:40:13,682 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 03:40:13,684 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 03:40:13,689 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 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 03:40:13,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:40:13,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 03:40:13,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-24 03:40:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 3 states have call successors, (3), 3 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 03:40:13,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-02-24 03:40:13,727 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 17 [2022-02-24 03:40:13,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:13,728 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-02-24 03:40:13,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 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 03:40:13,729 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-02-24 03:40:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:40:13,730 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:13,730 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:13,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:40:13,731 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:13,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:13,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2115201689, now seen corresponding path program 1 times [2022-02-24 03:40:13,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:13,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575657159] [2022-02-24 03:40:13,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:13,737 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:40:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:14,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:14,067 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 03:40:14,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:14,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575657159] [2022-02-24 03:40:14,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [575657159] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:14,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:14,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:40:14,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940184807] [2022-02-24 03:40:14,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:14,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:40:14,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:14,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:40:14,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:40:14,073 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 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 03:40:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:14,247 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-02-24 03:40:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:40:14,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:40:14,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:14,249 INFO L225 Difference]: With dead ends: 38 [2022-02-24 03:40:14,249 INFO L226 Difference]: Without dead ends: 19 [2022-02-24 03:40:14,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:40:14,256 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:14,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 36 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:14,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-24 03:40:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-24 03:40:14,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 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 03:40:14,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-02-24 03:40:14,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 17 [2022-02-24 03:40:14,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:14,268 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-02-24 03:40:14,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 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 03:40:14,269 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-02-24 03:40:14,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 03:40:14,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:14,269 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 03:40:14,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:40:14,270 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:14,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:14,270 INFO L85 PathProgramCache]: Analyzing trace with hash -121895178, now seen corresponding path program 1 times [2022-02-24 03:40:14,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:14,271 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766056357] [2022-02-24 03:40:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:14,508 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:14,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:14,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:14,851 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 03:40:14,934 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:14,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766056357] [2022-02-24 03:40:14,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766056357] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:14,935 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:14,935 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:40:14,935 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147120846] [2022-02-24 03:40:14,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:14,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:40:14,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:14,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:40:14,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:40:14,937 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 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 03:40:15,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:15,258 INFO L93 Difference]: Finished difference Result 35 states and 47 transitions. [2022-02-24 03:40:15,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:40:15,259 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 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 03:40:15,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:15,259 INFO L225 Difference]: With dead ends: 35 [2022-02-24 03:40:15,260 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 03:40:15,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:40:15,261 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:15,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 47 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:15,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 03:40:15,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-24 03:40:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 3 states have call successors, (3), 3 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 03:40:15,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-02-24 03:40:15,266 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 18 [2022-02-24 03:40:15,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:15,266 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-02-24 03:40:15,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 9 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 03:40:15,267 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-02-24 03:40:15,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:40:15,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:15,269 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:15,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:40:15,269 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:15,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:15,270 INFO L85 PathProgramCache]: Analyzing trace with hash 550711896, now seen corresponding path program 1 times [2022-02-24 03:40:15,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:15,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314313403] [2022-02-24 03:40:15,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:15,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:18,365 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:18,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:18,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:18,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:18,416 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:18,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314313403] [2022-02-24 03:40:18,416 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [314313403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:18,416 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:18,416 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:40:18,416 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444488387] [2022-02-24 03:40:18,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:18,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:40:18,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:18,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:40:18,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:40:18,417 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:18,503 INFO L93 Difference]: Finished difference Result 40 states and 57 transitions. [2022-02-24 03:40:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:40:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:40:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:18,506 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:40:18,506 INFO L226 Difference]: Without dead ends: 33 [2022-02-24 03:40:18,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:40:18,515 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:18,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 29 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:40:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-24 03:40:18,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-02-24 03:40:18,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:18,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-02-24 03:40:18,526 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 19 [2022-02-24 03:40:18,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:18,526 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-02-24 03:40:18,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:18,527 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-02-24 03:40:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:40:18,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:18,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:18,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:40:18,527 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:18,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:18,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1953540295, now seen corresponding path program 1 times [2022-02-24 03:40:18,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:18,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416211360] [2022-02-24 03:40:18,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:18,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:18,667 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:18,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:18,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:18,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:18,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:18,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416211360] [2022-02-24 03:40:18,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416211360] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:18,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:18,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:40:18,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125657875] [2022-02-24 03:40:18,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:18,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:40:18,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:18,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:40:18,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:40:18,723 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:18,812 INFO L93 Difference]: Finished difference Result 51 states and 74 transitions. [2022-02-24 03:40:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:40:18,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:40:18,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:18,817 INFO L225 Difference]: With dead ends: 51 [2022-02-24 03:40:18,817 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:40:18,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:40:18,818 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 46 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:18,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:40:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:40:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 29. [2022-02-24 03:40:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 24 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 03:40:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2022-02-24 03:40:18,829 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 19 [2022-02-24 03:40:18,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:18,832 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2022-02-24 03:40:18,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2022-02-24 03:40:18,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:40:18,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:18,833 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:18,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:40:18,833 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:18,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1989908199, now seen corresponding path program 1 times [2022-02-24 03:40:18,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:18,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078654027] [2022-02-24 03:40:18,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:18,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:18,963 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,015 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 03:40:19,028 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:19,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078654027] [2022-02-24 03:40:19,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078654027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:19,028 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:19,028 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:40:19,028 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234848222] [2022-02-24 03:40:19,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:19,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:40:19,028 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:19,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:40:19,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:40:19,029 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:19,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:19,153 INFO L93 Difference]: Finished difference Result 58 states and 85 transitions. [2022-02-24 03:40:19,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:40:19,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:40:19,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:19,155 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:40:19,155 INFO L226 Difference]: Without dead ends: 51 [2022-02-24 03:40:19,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:40:19,156 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:19,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 37 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:19,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-24 03:40:19,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2022-02-24 03:40:19,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.5172413793103448) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 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 03:40:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 48 transitions. [2022-02-24 03:40:19,172 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 48 transitions. Word has length 19 [2022-02-24 03:40:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 48 transitions. [2022-02-24 03:40:19,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:19,173 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 48 transitions. [2022-02-24 03:40:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:40:19,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:19,174 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:19,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:40:19,174 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:19,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash -676014568, now seen corresponding path program 1 times [2022-02-24 03:40:19,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:19,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973458490] [2022-02-24 03:40:19,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:19,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:19,303 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:19,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:19,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:19,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973458490] [2022-02-24 03:40:19,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1973458490] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:19,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:19,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:40:19,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428649043] [2022-02-24 03:40:19,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:19,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:40:19,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:19,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:40:19,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:40:19,356 INFO L87 Difference]: Start difference. First operand 34 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:19,434 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-02-24 03:40:19,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:40:19,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 03:40:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:19,435 INFO L225 Difference]: With dead ends: 50 [2022-02-24 03:40:19,435 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 03:40:19,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:40:19,436 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:19,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:19,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 03:40:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2022-02-24 03:40:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 03:40:19,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-02-24 03:40:19,442 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 19 [2022-02-24 03:40:19,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:19,442 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-02-24 03:40:19,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 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 03:40:19,442 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-02-24 03:40:19,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:40:19,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:19,443 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 03:40:19,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:40:19,443 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1300031754, now seen corresponding path program 1 times [2022-02-24 03:40:19,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:19,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015882891] [2022-02-24 03:40:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:19,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:19,559 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:19,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:19,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015882891] [2022-02-24 03:40:19,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1015882891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:19,614 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:19,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:40:19,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293042125] [2022-02-24 03:40:19,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:19,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:40:19,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:19,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:40:19,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:40:19,615 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 03:40:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:19,701 INFO L93 Difference]: Finished difference Result 52 states and 74 transitions. [2022-02-24 03:40:19,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:40:19,702 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 03:40:19,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:19,703 INFO L225 Difference]: With dead ends: 52 [2022-02-24 03:40:19,704 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 03:40:19,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:40:19,705 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:19,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 35 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 03:40:19,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-02-24 03:40:19,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (3), 3 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 03:40:19,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-02-24 03:40:19,716 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 20 [2022-02-24 03:40:19,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:19,717 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-02-24 03:40:19,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 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 03:40:19,718 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-02-24 03:40:19,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 03:40:19,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:19,719 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] [2022-02-24 03:40:19,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:40:19,721 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:19,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1232820840, now seen corresponding path program 1 times [2022-02-24 03:40:19,722 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:19,722 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1188317545] [2022-02-24 03:40:19,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:19,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:19,854 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:19,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:19,931 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 03:40:19,977 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:19,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1188317545] [2022-02-24 03:40:19,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1188317545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:19,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:19,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:40:19,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295448271] [2022-02-24 03:40:19,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:19,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:40:19,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:19,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:40:19,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:40:19,979 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 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 03:40:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:20,134 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2022-02-24 03:40:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:40:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 03:40:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:20,135 INFO L225 Difference]: With dead ends: 53 [2022-02-24 03:40:20,136 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:40:20,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:40:20,136 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:20,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:40:20,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 35. [2022-02-24 03:40:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 30 states have internal predecessors, (44), 3 states have call successors, (3), 3 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 03:40:20,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 48 transitions. [2022-02-24 03:40:20,144 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 48 transitions. Word has length 21 [2022-02-24 03:40:20,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:20,144 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 48 transitions. [2022-02-24 03:40:20,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 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 03:40:20,145 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2022-02-24 03:40:20,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:40:20,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:20,145 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 03:40:20,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:40:20,145 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:20,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:20,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1372943636, now seen corresponding path program 1 times [2022-02-24 03:40:20,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:20,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531797475] [2022-02-24 03:40:20,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:20,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:20,276 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:20,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:20,323 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 03:40:20,334 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:20,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531797475] [2022-02-24 03:40:20,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531797475] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:20,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:20,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:40:20,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662219790] [2022-02-24 03:40:20,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:20,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:40:20,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:20,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:40:20,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:40:20,335 INFO L87 Difference]: Start difference. First operand 35 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 03:40:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:20,501 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2022-02-24 03:40:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:40:20,502 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 03:40:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:20,502 INFO L225 Difference]: With dead ends: 57 [2022-02-24 03:40:20,502 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 03:40:20,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:40:20,503 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:20,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 03:40:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-02-24 03:40:20,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 35 states have internal predecessors, (52), 3 states have call successors, (3), 3 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 03:40:20,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 56 transitions. [2022-02-24 03:40:20,513 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 56 transitions. Word has length 22 [2022-02-24 03:40:20,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:20,514 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 56 transitions. [2022-02-24 03:40:20,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 03:40:20,514 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 56 transitions. [2022-02-24 03:40:20,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:40:20,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:20,514 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:20,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:40:20,515 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:20,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:20,515 INFO L85 PathProgramCache]: Analyzing trace with hash 850717494, now seen corresponding path program 2 times [2022-02-24 03:40:20,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:20,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139111048] [2022-02-24 03:40:20,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:20,615 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:20,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:20,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:20,676 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 03:40:20,686 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:20,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139111048] [2022-02-24 03:40:20,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139111048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:20,687 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:20,687 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:40:20,687 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271286727] [2022-02-24 03:40:20,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:20,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:40:20,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:20,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:40:20,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:40:20,688 INFO L87 Difference]: Start difference. First operand 40 states and 56 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 03:40:20,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:20,864 INFO L93 Difference]: Finished difference Result 62 states and 87 transitions. [2022-02-24 03:40:20,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:40:20,864 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 03:40:20,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:20,865 INFO L225 Difference]: With dead ends: 62 [2022-02-24 03:40:20,865 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:40:20,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:40:20,866 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:20,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 47 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:20,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:40:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-02-24 03:40:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 states have internal predecessors, (48), 3 states have call successors, (3), 3 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 03:40:20,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 52 transitions. [2022-02-24 03:40:20,878 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 52 transitions. Word has length 22 [2022-02-24 03:40:20,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:20,878 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 52 transitions. [2022-02-24 03:40:20,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 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 03:40:20,878 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 52 transitions. [2022-02-24 03:40:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:40:20,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:20,880 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] [2022-02-24 03:40:20,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:40:20,880 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:20,880 INFO L85 PathProgramCache]: Analyzing trace with hash 887085398, now seen corresponding path program 1 times [2022-02-24 03:40:20,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:20,881 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103225470] [2022-02-24 03:40:20,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:20,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:21,023 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:21,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:21,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:21,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:21,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103225470] [2022-02-24 03:40:21,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103225470] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:21,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:21,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:40:21,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278492774] [2022-02-24 03:40:21,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:21,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:40:21,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:21,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:40:21,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:40:21,179 INFO L87 Difference]: Start difference. First operand 38 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 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 03:40:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:21,458 INFO L93 Difference]: Finished difference Result 77 states and 111 transitions. [2022-02-24 03:40:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:40:21,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have 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 03:40:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:21,459 INFO L225 Difference]: With dead ends: 77 [2022-02-24 03:40:21,459 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:40:21,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:40:21,460 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 50 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:21,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 52 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:40:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 43. [2022-02-24 03:40:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.4210526315789473) internal successors, (54), 38 states have internal predecessors, (54), 3 states have call successors, (3), 3 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 03:40:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 58 transitions. [2022-02-24 03:40:21,480 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 58 transitions. Word has length 22 [2022-02-24 03:40:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:21,480 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 58 transitions. [2022-02-24 03:40:21,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 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 03:40:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 58 transitions. [2022-02-24 03:40:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:40:21,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:21,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:21,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:40:21,482 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:21,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:21,482 INFO L85 PathProgramCache]: Analyzing trace with hash -353925126, now seen corresponding path program 1 times [2022-02-24 03:40:21,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:21,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089850978] [2022-02-24 03:40:21,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:21,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:21,601 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:21,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:21,894 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 03:40:21,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:21,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089850978] [2022-02-24 03:40:21,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1089850978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:21,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:21,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:40:21,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138841666] [2022-02-24 03:40:21,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:21,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:40:21,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:21,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:40:21,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:40:21,967 INFO L87 Difference]: Start difference. First operand 43 states and 58 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 03:40:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:22,758 INFO L93 Difference]: Finished difference Result 60 states and 80 transitions. [2022-02-24 03:40:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:40:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 03:40:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:22,759 INFO L225 Difference]: With dead ends: 60 [2022-02-24 03:40:22,759 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 03:40:22,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:40:22,760 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:22,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 70 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:40:22,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 03:40:22,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2022-02-24 03:40:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 41 states have internal predecessors, (58), 3 states have call successors, (3), 3 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 03:40:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2022-02-24 03:40:22,773 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 23 [2022-02-24 03:40:22,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:22,774 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2022-02-24 03:40:22,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 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 03:40:22,774 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2022-02-24 03:40:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:40:22,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:22,774 INFO L514 BasicCegarLoop]: trace histogram [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 03:40:22,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:40:22,775 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:22,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:22,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1947718100, now seen corresponding path program 2 times [2022-02-24 03:40:22,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:22,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157090155] [2022-02-24 03:40:22,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:22,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:22,894 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:22,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:22,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:22,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:22,951 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 03:40:22,965 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:22,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157090155] [2022-02-24 03:40:22,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [157090155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:22,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:22,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:40:22,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832190330] [2022-02-24 03:40:22,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:22,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:40:22,966 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:40:22,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:40:22,967 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 03:40:23,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:23,162 INFO L93 Difference]: Finished difference Result 85 states and 120 transitions. [2022-02-24 03:40:23,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:40:23,163 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 03:40:23,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:23,163 INFO L225 Difference]: With dead ends: 85 [2022-02-24 03:40:23,163 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:40:23,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:40:23,164 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:23,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 46 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:40:23,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:40:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 36. [2022-02-24 03:40:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4193548387096775) internal successors, (44), 31 states have internal predecessors, (44), 3 states have call successors, (3), 3 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 03:40:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-02-24 03:40:23,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 24 [2022-02-24 03:40:23,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:23,174 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-02-24 03:40:23,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 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 03:40:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-02-24 03:40:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:40:23,174 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:23,175 INFO L514 BasicCegarLoop]: trace histogram [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 03:40:23,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:40:23,175 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:23,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:23,175 INFO L85 PathProgramCache]: Analyzing trace with hash 1824672953, now seen corresponding path program 1 times [2022-02-24 03:40:23,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:23,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430096483] [2022-02-24 03:40:23,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:23,308 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:23,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:23,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:23,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430096483] [2022-02-24 03:40:23,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [430096483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:23,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:23,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:40:23,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933363927] [2022-02-24 03:40:23,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:23,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:40:23,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:23,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:40:23,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:40:23,486 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 03:40:23,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:23,882 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2022-02-24 03:40:23,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:40:23,883 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 03:40:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:23,883 INFO L225 Difference]: With dead ends: 70 [2022-02-24 03:40:23,883 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:40:23,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:40:23,884 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:23,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:40:23,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:40:23,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 37. [2022-02-24 03:40:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 3 states have call successors, (3), 3 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 03:40:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-02-24 03:40:23,895 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 25 [2022-02-24 03:40:23,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:23,895 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-02-24 03:40:23,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 03:40:23,895 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-02-24 03:40:23,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:40:23,895 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:23,895 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:23,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:40:23,895 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:23,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:23,896 INFO L85 PathProgramCache]: Analyzing trace with hash -529458535, now seen corresponding path program 1 times [2022-02-24 03:40:23,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:23,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812943778] [2022-02-24 03:40:23,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:23,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:23,977 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:24,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:24,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:24,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812943778] [2022-02-24 03:40:24,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812943778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:24,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:24,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:40:24,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739883340] [2022-02-24 03:40:24,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:24,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:40:24,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:24,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:40:24,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:40:24,096 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 03:40:24,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:24,522 INFO L93 Difference]: Finished difference Result 75 states and 106 transitions. [2022-02-24 03:40:24,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:40:24,523 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 03:40:24,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:24,523 INFO L225 Difference]: With dead ends: 75 [2022-02-24 03:40:24,523 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 03:40:24,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:40:24,524 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:24,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 48 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:40:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 03:40:24,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2022-02-24 03:40:24,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2022-02-24 03:40:24,552 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 25 [2022-02-24 03:40:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:24,553 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2022-02-24 03:40:24,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 03:40:24,553 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2022-02-24 03:40:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:40:24,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:24,554 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:24,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:40:24,555 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1702758372, now seen corresponding path program 2 times [2022-02-24 03:40:24,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:24,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086757225] [2022-02-24 03:40:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:24,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:24,672 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:24,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:24,759 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 03:40:24,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:24,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086757225] [2022-02-24 03:40:24,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1086757225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:24,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:24,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:40:24,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384251539] [2022-02-24 03:40:24,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:24,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:40:24,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:24,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:40:24,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:40:24,793 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:25,148 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2022-02-24 03:40:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:40:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 03:40:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:25,149 INFO L225 Difference]: With dead ends: 78 [2022-02-24 03:40:25,149 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 03:40:25,149 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:40:25,150 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:25,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 58 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:40:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 03:40:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 53. [2022-02-24 03:40:25,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.375) internal successors, (66), 48 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 70 transitions. [2022-02-24 03:40:25,167 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 70 transitions. Word has length 26 [2022-02-24 03:40:25,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:25,167 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 70 transitions. [2022-02-24 03:40:25,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:25,168 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 70 transitions. [2022-02-24 03:40:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:40:25,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:25,168 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:25,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:40:25,168 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:25,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:25,168 INFO L85 PathProgramCache]: Analyzing trace with hash -926563420, now seen corresponding path program 2 times [2022-02-24 03:40:25,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:25,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444555512] [2022-02-24 03:40:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:25,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:25,282 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:25,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:25,377 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 03:40:25,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:25,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444555512] [2022-02-24 03:40:25,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444555512] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:25,414 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:25,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:40:25,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188122336] [2022-02-24 03:40:25,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:25,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:40:25,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:25,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:40:25,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:40:25,415 INFO L87 Difference]: Start difference. First operand 53 states and 70 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 03:40:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:26,619 INFO L93 Difference]: Finished difference Result 121 states and 176 transitions. [2022-02-24 03:40:26,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:40:26,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 03:40:26,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:26,621 INFO L225 Difference]: With dead ends: 121 [2022-02-24 03:40:26,621 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 03:40:26,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=394, Invalid=1958, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 03:40:26,622 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 96 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:26,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 67 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:40:26,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 03:40:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-02-24 03:40:26,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3793103448275863) internal successors, (80), 58 states have internal predecessors, (80), 3 states have call successors, (3), 3 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 03:40:26,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 84 transitions. [2022-02-24 03:40:26,645 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 84 transitions. Word has length 26 [2022-02-24 03:40:26,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:26,645 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 84 transitions. [2022-02-24 03:40:26,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 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 03:40:26,645 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 84 transitions. [2022-02-24 03:40:26,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:40:26,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:26,646 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:26,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:40:26,646 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:26,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:26,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1041168377, now seen corresponding path program 2 times [2022-02-24 03:40:26,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:26,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937294323] [2022-02-24 03:40:26,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:26,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:26,756 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:26,834 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 03:40:26,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:26,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937294323] [2022-02-24 03:40:26,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [937294323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:26,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:26,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:40:26,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479489111] [2022-02-24 03:40:26,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:26,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:40:26,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:26,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:40:26,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:40:26,868 INFO L87 Difference]: Start difference. First operand 63 states and 84 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 03:40:27,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:27,327 INFO L93 Difference]: Finished difference Result 95 states and 134 transitions. [2022-02-24 03:40:27,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:40:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 27 [2022-02-24 03:40:27,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:27,328 INFO L225 Difference]: With dead ends: 95 [2022-02-24 03:40:27,328 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 03:40:27,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=515, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:40:27,329 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:27,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 52 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:40:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 03:40:27,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 63. [2022-02-24 03:40:27,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 58 states have internal predecessors, (78), 3 states have call successors, (3), 3 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 03:40:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 82 transitions. [2022-02-24 03:40:27,361 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 82 transitions. Word has length 27 [2022-02-24 03:40:27,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:27,362 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 82 transitions. [2022-02-24 03:40:27,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 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 03:40:27,362 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 82 transitions. [2022-02-24 03:40:27,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 03:40:27,362 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:27,362 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:27,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:40:27,362 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:27,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:27,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1479970823, now seen corresponding path program 3 times [2022-02-24 03:40:27,363 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:27,363 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86124045] [2022-02-24 03:40:27,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:27,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:27,474 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:27,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:27,547 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 03:40:27,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:27,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86124045] [2022-02-24 03:40:27,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [86124045] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:27,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:27,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:40:27,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951561359] [2022-02-24 03:40:27,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:27,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:40:27,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:27,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:40:27,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:40:27,584 INFO L87 Difference]: Start difference. First operand 63 states and 82 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 03:40:28,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:28,034 INFO L93 Difference]: Finished difference Result 186 states and 264 transitions. [2022-02-24 03:40:28,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:40:28,035 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 27 [2022-02-24 03:40:28,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:28,035 INFO L225 Difference]: With dead ends: 186 [2022-02-24 03:40:28,035 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 03:40:28,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:40:28,036 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 135 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:28,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 57 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:40:28,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 03:40:28,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 71. [2022-02-24 03:40:28,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.3333333333333333) internal successors, (88), 66 states have internal predecessors, (88), 3 states have call successors, (3), 3 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 03:40:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 92 transitions. [2022-02-24 03:40:28,096 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 92 transitions. Word has length 27 [2022-02-24 03:40:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:28,096 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 92 transitions. [2022-02-24 03:40:28,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 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 03:40:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 92 transitions. [2022-02-24 03:40:28,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:40:28,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:28,096 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:28,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:40:28,097 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:28,097 INFO L85 PathProgramCache]: Analyzing trace with hash 939274105, now seen corresponding path program 3 times [2022-02-24 03:40:28,097 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:28,097 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147055540] [2022-02-24 03:40:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:28,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:28,204 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:28,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:28,394 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 03:40:28,502 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:28,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147055540] [2022-02-24 03:40:28,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2147055540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:28,503 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:28,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:40:28,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730722688] [2022-02-24 03:40:28,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:28,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:40:28,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:28,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:40:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:40:28,504 INFO L87 Difference]: Start difference. First operand 71 states and 92 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 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 03:40:29,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:29,048 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2022-02-24 03:40:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:40:29,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 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 29 [2022-02-24 03:40:29,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:29,049 INFO L225 Difference]: With dead ends: 80 [2022-02-24 03:40:29,049 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 03:40:29,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:40:29,050 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:29,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 65 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:40:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 03:40:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 03:40:29,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.3285714285714285) internal successors, (93), 70 states have internal predecessors, (93), 3 states have call successors, (3), 3 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 03:40:29,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 97 transitions. [2022-02-24 03:40:29,080 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 97 transitions. Word has length 29 [2022-02-24 03:40:29,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:29,080 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 97 transitions. [2022-02-24 03:40:29,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 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 03:40:29,081 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 97 transitions. [2022-02-24 03:40:29,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:40:29,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:29,081 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:29,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:40:29,081 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:29,081 INFO L85 PathProgramCache]: Analyzing trace with hash 522425753, now seen corresponding path program 2 times [2022-02-24 03:40:29,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:29,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260849936] [2022-02-24 03:40:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:29,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:29,194 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:29,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:29,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:29,337 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:29,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260849936] [2022-02-24 03:40:29,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [260849936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:29,337 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:29,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:40:29,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34773257] [2022-02-24 03:40:29,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:29,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:40:29,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:29,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:40:29,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:40:29,338 INFO L87 Difference]: Start difference. First operand 75 states and 97 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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 03:40:29,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:29,855 INFO L93 Difference]: Finished difference Result 212 states and 298 transitions. [2022-02-24 03:40:29,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:40:29,857 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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 29 [2022-02-24 03:40:29,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:29,858 INFO L225 Difference]: With dead ends: 212 [2022-02-24 03:40:29,858 INFO L226 Difference]: Without dead ends: 195 [2022-02-24 03:40:29,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:40:29,859 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:29,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 67 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:40:29,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-24 03:40:29,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 82. [2022-02-24 03:40:29,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.3246753246753247) internal successors, (102), 77 states have internal predecessors, (102), 3 states have call successors, (3), 3 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 03:40:29,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2022-02-24 03:40:29,901 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 29 [2022-02-24 03:40:29,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:29,901 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2022-02-24 03:40:29,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 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 03:40:29,901 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2022-02-24 03:40:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:40:29,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:29,901 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:29,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:40:29,902 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:29,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:29,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1093480841, now seen corresponding path program 3 times [2022-02-24 03:40:29,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:29,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558826218] [2022-02-24 03:40:29,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:29,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:30,012 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:30,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:30,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:30,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:30,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:30,192 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:30,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558826218] [2022-02-24 03:40:30,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558826218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:30,192 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:30,192 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:40:30,192 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891896811] [2022-02-24 03:40:30,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:30,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:40:30,193 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:30,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:40:30,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:40:30,193 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:31,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:31,069 INFO L93 Difference]: Finished difference Result 173 states and 237 transitions. [2022-02-24 03:40:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:40:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 03:40:31,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:31,070 INFO L225 Difference]: With dead ends: 173 [2022-02-24 03:40:31,070 INFO L226 Difference]: Without dead ends: 167 [2022-02-24 03:40:31,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:40:31,071 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:31,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 62 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:40:31,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-24 03:40:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 90. [2022-02-24 03:40:31,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 85 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:31,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2022-02-24 03:40:31,112 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 29 [2022-02-24 03:40:31,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:31,112 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2022-02-24 03:40:31,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:31,113 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2022-02-24 03:40:31,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:40:31,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:31,113 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:31,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:40:31,113 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:31,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1414418204, now seen corresponding path program 4 times [2022-02-24 03:40:31,114 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:31,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907057158] [2022-02-24 03:40:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:31,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:31,227 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:31,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:31,292 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 03:40:31,321 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:31,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907057158] [2022-02-24 03:40:31,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [907057158] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:31,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:31,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:40:31,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029247778] [2022-02-24 03:40:31,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:31,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:40:31,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:31,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:40:31,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:40:31,323 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:31,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:31,717 INFO L93 Difference]: Finished difference Result 148 states and 196 transitions. [2022-02-24 03:40:31,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:40:31,717 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 03:40:31,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:31,718 INFO L225 Difference]: With dead ends: 148 [2022-02-24 03:40:31,718 INFO L226 Difference]: Without dead ends: 137 [2022-02-24 03:40:31,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:40:31,718 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:31,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 48 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:40:31,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-24 03:40:31,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 90. [2022-02-24 03:40:31,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 85 states have internal predecessors, (110), 3 states have call successors, (3), 3 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 03:40:31,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 114 transitions. [2022-02-24 03:40:31,764 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 114 transitions. Word has length 30 [2022-02-24 03:40:31,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:31,764 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 114 transitions. [2022-02-24 03:40:31,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:31,764 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 114 transitions. [2022-02-24 03:40:31,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:40:31,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:31,765 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:31,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:40:31,765 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:31,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1097440363, now seen corresponding path program 3 times [2022-02-24 03:40:31,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:31,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020329361] [2022-02-24 03:40:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:31,884 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:32,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:32,022 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 03:40:32,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:32,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020329361] [2022-02-24 03:40:32,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1020329361] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:32,093 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:32,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:40:32,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026120433] [2022-02-24 03:40:32,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:32,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:40:32,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:32,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:40:32,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:40:32,094 INFO L87 Difference]: Start difference. First operand 90 states and 114 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 03:40:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:34,955 INFO L93 Difference]: Finished difference Result 181 states and 253 transitions. [2022-02-24 03:40:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:40:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 03:40:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:34,956 INFO L225 Difference]: With dead ends: 181 [2022-02-24 03:40:34,956 INFO L226 Difference]: Without dead ends: 150 [2022-02-24 03:40:34,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=814, Invalid=4736, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:40:34,958 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 138 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:34,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 77 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:40:34,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-24 03:40:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 111. [2022-02-24 03:40:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.320754716981132) internal successors, (140), 106 states have internal predecessors, (140), 3 states have call successors, (3), 3 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 03:40:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 144 transitions. [2022-02-24 03:40:35,028 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 144 transitions. Word has length 30 [2022-02-24 03:40:35,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:35,028 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 144 transitions. [2022-02-24 03:40:35,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 03:40:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 144 transitions. [2022-02-24 03:40:35,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 03:40:35,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:35,029 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:35,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:40:35,029 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:35,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:35,029 INFO L85 PathProgramCache]: Analyzing trace with hash -629277016, now seen corresponding path program 4 times [2022-02-24 03:40:35,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:35,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545015315] [2022-02-24 03:40:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:35,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:35,153 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:35,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:35,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:35,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:35,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:35,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545015315] [2022-02-24 03:40:35,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545015315] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:35,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:35,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:40:35,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551585126] [2022-02-24 03:40:35,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:35,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:40:35,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:40:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:40:35,329 INFO L87 Difference]: Start difference. First operand 111 states and 144 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:36,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:36,184 INFO L93 Difference]: Finished difference Result 324 states and 478 transitions. [2022-02-24 03:40:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:40:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 03:40:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:36,186 INFO L225 Difference]: With dead ends: 324 [2022-02-24 03:40:36,186 INFO L226 Difference]: Without dead ends: 301 [2022-02-24 03:40:36,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:40:36,186 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 150 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:36,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 79 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:40:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-24 03:40:36,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 119. [2022-02-24 03:40:36,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.3157894736842106) internal successors, (150), 114 states have internal predecessors, (150), 3 states have call successors, (3), 3 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 03:40:36,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2022-02-24 03:40:36,258 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 31 [2022-02-24 03:40:36,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:36,258 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2022-02-24 03:40:36,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:36,258 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2022-02-24 03:40:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 03:40:36,259 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:36,259 INFO L514 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:36,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:40:36,259 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:36,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1527963433, now seen corresponding path program 4 times [2022-02-24 03:40:36,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:36,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515797877] [2022-02-24 03:40:36,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:36,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:36,340 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:36,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:36,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:36,542 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:36,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515797877] [2022-02-24 03:40:36,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515797877] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:36,542 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:36,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:40:36,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364146901] [2022-02-24 03:40:36,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:36,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:40:36,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:36,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:40:36,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:40:36,543 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 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 03:40:37,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:37,564 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2022-02-24 03:40:37,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:40:37,564 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 03:40:37,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:37,565 INFO L225 Difference]: With dead ends: 230 [2022-02-24 03:40:37,565 INFO L226 Difference]: Without dead ends: 149 [2022-02-24 03:40:37,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=237, Invalid=1245, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:40:37,566 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 83 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:37,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 69 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:40:37,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-24 03:40:37,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 93. [2022-02-24 03:40:37,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.3295454545454546) internal successors, (117), 88 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:37,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 121 transitions. [2022-02-24 03:40:37,626 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 121 transitions. Word has length 31 [2022-02-24 03:40:37,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:37,626 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 121 transitions. [2022-02-24 03:40:37,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 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 03:40:37,627 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 121 transitions. [2022-02-24 03:40:37,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:40:37,627 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:37,627 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:37,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:40:37,627 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:37,627 INFO L85 PathProgramCache]: Analyzing trace with hash -106095820, now seen corresponding path program 3 times [2022-02-24 03:40:37,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:37,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76646210] [2022-02-24 03:40:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:37,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:37,736 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:37,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:37,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:37,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:37,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76646210] [2022-02-24 03:40:37,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [76646210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:37,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:37,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:40:37,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034080275] [2022-02-24 03:40:37,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:37,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:40:37,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:40:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:40:37,964 INFO L87 Difference]: Start difference. First operand 93 states and 121 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 03:40:39,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:39,030 INFO L93 Difference]: Finished difference Result 151 states and 212 transitions. [2022-02-24 03:40:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:40:39,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 03:40:39,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:39,031 INFO L225 Difference]: With dead ends: 151 [2022-02-24 03:40:39,031 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 03:40:39,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=1228, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:40:39,032 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:39,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 58 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:40:39,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 03:40:39,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 93. [2022-02-24 03:40:39,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 88 states have internal predecessors, (114), 3 states have call successors, (3), 3 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 03:40:39,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2022-02-24 03:40:39,080 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 32 [2022-02-24 03:40:39,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:39,080 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2022-02-24 03:40:39,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 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 03:40:39,080 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2022-02-24 03:40:39,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:40:39,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:39,081 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:39,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:40:39,081 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:39,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:39,081 INFO L85 PathProgramCache]: Analyzing trace with hash 503233447, now seen corresponding path program 5 times [2022-02-24 03:40:39,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:39,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174417480] [2022-02-24 03:40:39,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:39,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:39,191 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:39,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:39,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:39,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:39,385 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 03:40:39,508 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:39,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174417480] [2022-02-24 03:40:39,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174417480] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:39,509 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:39,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:40:39,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897405946] [2022-02-24 03:40:39,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:39,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:40:39,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:39,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:40:39,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:40:39,510 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:40:46,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:46,808 INFO L93 Difference]: Finished difference Result 233 states and 328 transitions. [2022-02-24 03:40:46,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 03:40:46,809 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 03:40:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:46,810 INFO L225 Difference]: With dead ends: 233 [2022-02-24 03:40:46,810 INFO L226 Difference]: Without dead ends: 196 [2022-02-24 03:40:46,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5147 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1817, Invalid=11755, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:40:46,813 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 230 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 350 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 350 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:46,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 87 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [350 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:40:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-24 03:40:46,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 118. [2022-02-24 03:40:46,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.3274336283185841) internal successors, (150), 113 states have internal predecessors, (150), 3 states have call successors, (3), 3 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 03:40:46,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2022-02-24 03:40:46,881 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 33 [2022-02-24 03:40:46,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:46,881 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2022-02-24 03:40:46,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:40:46,881 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2022-02-24 03:40:46,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:40:46,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:46,882 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:46,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:40:46,882 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1559024999, now seen corresponding path program 5 times [2022-02-24 03:40:46,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:46,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018500844] [2022-02-24 03:40:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:46,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:46,995 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:47,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:47,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:47,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:47,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018500844] [2022-02-24 03:40:47,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2018500844] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:47,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:47,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:40:47,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664189834] [2022-02-24 03:40:47,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:47,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:40:47,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:47,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:40:47,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:40:47,373 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 03:40:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:49,171 INFO L93 Difference]: Finished difference Result 232 states and 329 transitions. [2022-02-24 03:40:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:40:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 33 [2022-02-24 03:40:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:49,173 INFO L225 Difference]: With dead ends: 232 [2022-02-24 03:40:49,173 INFO L226 Difference]: Without dead ends: 220 [2022-02-24 03:40:49,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=253, Invalid=1469, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:40:49,174 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:49,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 76 Invalid, 620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:40:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-24 03:40:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 127. [2022-02-24 03:40:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.3032786885245902) internal successors, (159), 122 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 163 transitions. [2022-02-24 03:40:49,250 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 163 transitions. Word has length 33 [2022-02-24 03:40:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:49,250 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 163 transitions. [2022-02-24 03:40:49,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 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 03:40:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 163 transitions. [2022-02-24 03:40:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:40:49,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:49,250 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:49,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:40:49,250 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1746970838, now seen corresponding path program 6 times [2022-02-24 03:40:49,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:49,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564884776] [2022-02-24 03:40:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:49,382 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:49,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:49,567 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 03:40:49,716 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:49,716 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564884776] [2022-02-24 03:40:49,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [564884776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:49,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:49,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:40:49,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123684953] [2022-02-24 03:40:49,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:49,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:40:49,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:40:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:40:49,717 INFO L87 Difference]: Start difference. First operand 127 states and 163 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 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 03:40:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:51,199 INFO L93 Difference]: Finished difference Result 439 states and 648 transitions. [2022-02-24 03:40:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:40:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 03:40:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:51,202 INFO L225 Difference]: With dead ends: 439 [2022-02-24 03:40:51,202 INFO L226 Difference]: Without dead ends: 412 [2022-02-24 03:40:51,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:40:51,203 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 187 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:51,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 73 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:40:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-02-24 03:40:51,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 137. [2022-02-24 03:40:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.303030303030303) internal successors, (172), 132 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 03:40:51,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 176 transitions. [2022-02-24 03:40:51,304 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 176 transitions. Word has length 34 [2022-02-24 03:40:51,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:51,304 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 176 transitions. [2022-02-24 03:40:51,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 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 03:40:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 176 transitions. [2022-02-24 03:40:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:40:51,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:51,305 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:51,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:40:51,305 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:51,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash 289270042, now seen corresponding path program 5 times [2022-02-24 03:40:51,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:51,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806497433] [2022-02-24 03:40:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:51,396 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:52,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:52,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:40:53,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:53,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806497433] [2022-02-24 03:40:53,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [806497433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:53,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:53,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:40:53,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895210061] [2022-02-24 03:40:53,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:53,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:40:53,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:53,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:40:53,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:40:53,037 INFO L87 Difference]: Start difference. First operand 137 states and 176 transitions. Second operand has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 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 03:40:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:55,953 INFO L93 Difference]: Finished difference Result 160 states and 208 transitions. [2022-02-24 03:40:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:40:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 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 35 [2022-02-24 03:40:55,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:55,954 INFO L225 Difference]: With dead ends: 160 [2022-02-24 03:40:55,954 INFO L226 Difference]: Without dead ends: 155 [2022-02-24 03:40:55,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=203, Invalid=1867, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:40:55,955 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:55,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 94 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:40:55,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-24 03:40:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 142. [2022-02-24 03:40:56,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.2992700729927007) internal successors, (178), 137 states have internal predecessors, (178), 3 states have call successors, (3), 3 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 03:40:56,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 182 transitions. [2022-02-24 03:40:56,051 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 182 transitions. Word has length 35 [2022-02-24 03:40:56,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:56,052 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 182 transitions. [2022-02-24 03:40:56,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 22 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 03:40:56,052 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 182 transitions. [2022-02-24 03:40:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:40:56,052 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:56,052 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:56,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:40:56,052 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:56,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:56,053 INFO L85 PathProgramCache]: Analyzing trace with hash -759177288, now seen corresponding path program 7 times [2022-02-24 03:40:56,053 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:56,053 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1824189100] [2022-02-24 03:40:56,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:56,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:56,164 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:56,467 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 03:40:56,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:40:56,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1824189100] [2022-02-24 03:40:56,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1824189100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:40:56,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:40:56,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:40:56,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962819326] [2022-02-24 03:40:56,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:40:56,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:40:56,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:40:56,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:40:56,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:40:56,636 INFO L87 Difference]: Start difference. First operand 142 states and 182 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 03:41:10,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 03:41:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:15,610 INFO L93 Difference]: Finished difference Result 325 states and 466 transitions. [2022-02-24 03:41:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-24 03:41:15,611 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 35 [2022-02-24 03:41:15,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:15,612 INFO L225 Difference]: With dead ends: 325 [2022-02-24 03:41:15,612 INFO L226 Difference]: Without dead ends: 273 [2022-02-24 03:41:15,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10384 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=3121, Invalid=22319, Unknown=0, NotChecked=0, Total=25440 [2022-02-24 03:41:15,617 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 279 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:15,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 103 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 03:41:15,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-24 03:41:15,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 171. [2022-02-24 03:41:15,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3253012048192772) internal successors, (220), 166 states have internal predecessors, (220), 3 states have call successors, (3), 3 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 03:41:15,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2022-02-24 03:41:15,741 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 35 [2022-02-24 03:41:15,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:15,741 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2022-02-24 03:41:15,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 03:41:15,741 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2022-02-24 03:41:15,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:41:15,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:15,741 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:15,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:41:15,742 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:15,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:15,742 INFO L85 PathProgramCache]: Analyzing trace with hash 2040976357, now seen corresponding path program 6 times [2022-02-24 03:41:15,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:15,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346296122] [2022-02-24 03:41:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:15,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:15,859 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:15,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:15,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:15,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:15,987 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 03:41:16,169 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:16,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346296122] [2022-02-24 03:41:16,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346296122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:16,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:16,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:41:16,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738727807] [2022-02-24 03:41:16,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:16,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:41:16,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:16,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:41:16,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:41:16,170 INFO L87 Difference]: Start difference. First operand 171 states and 224 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 03:41:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:17,671 INFO L93 Difference]: Finished difference Result 319 states and 450 transitions. [2022-02-24 03:41:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:41:17,673 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 36 [2022-02-24 03:41:17,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:17,674 INFO L225 Difference]: With dead ends: 319 [2022-02-24 03:41:17,674 INFO L226 Difference]: Without dead ends: 305 [2022-02-24 03:41:17,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=638, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:41:17,674 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:17,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 55 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:41:17,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-24 03:41:17,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 171. [2022-02-24 03:41:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.319277108433735) internal successors, (219), 166 states have internal predecessors, (219), 3 states have call successors, (3), 3 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 03:41:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 223 transitions. [2022-02-24 03:41:17,803 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 223 transitions. Word has length 36 [2022-02-24 03:41:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 223 transitions. [2022-02-24 03:41:17,803 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 03:41:17,804 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 223 transitions. [2022-02-24 03:41:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:41:17,804 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:17,804 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:17,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:41:17,804 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:17,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:17,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1266943717, now seen corresponding path program 8 times [2022-02-24 03:41:17,804 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:17,805 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303139039] [2022-02-24 03:41:17,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:17,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:17,917 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:18,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:18,230 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 03:41:18,489 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:18,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303139039] [2022-02-24 03:41:18,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [303139039] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:18,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:18,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:41:18,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626908460] [2022-02-24 03:41:18,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:18,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:41:18,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:18,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:41:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:41:18,491 INFO L87 Difference]: Start difference. First operand 171 states and 223 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 03:41:20,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:20,949 INFO L93 Difference]: Finished difference Result 613 states and 941 transitions. [2022-02-24 03:41:20,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:41:20,950 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 36 [2022-02-24 03:41:20,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:20,951 INFO L225 Difference]: With dead ends: 613 [2022-02-24 03:41:20,951 INFO L226 Difference]: Without dead ends: 578 [2022-02-24 03:41:20,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:41:20,952 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 224 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:20,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 90 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:41:20,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-02-24 03:41:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 181. [2022-02-24 03:41:21,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.3125) internal successors, (231), 176 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:21,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 235 transitions. [2022-02-24 03:41:21,110 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 235 transitions. Word has length 36 [2022-02-24 03:41:21,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:21,111 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 235 transitions. [2022-02-24 03:41:21,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 03:41:21,111 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 235 transitions. [2022-02-24 03:41:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:41:21,111 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:21,111 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:21,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:41:21,111 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:21,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1101820612, now seen corresponding path program 6 times [2022-02-24 03:41:21,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:21,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395370387] [2022-02-24 03:41:21,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:21,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:21,236 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:21,515 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 03:41:21,894 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:21,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395370387] [2022-02-24 03:41:21,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395370387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:21,895 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:21,895 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:41:21,895 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089940568] [2022-02-24 03:41:21,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:21,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:41:21,895 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:41:21,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:41:21,896 INFO L87 Difference]: Start difference. First operand 181 states and 235 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 03:41:25,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:25,630 INFO L93 Difference]: Finished difference Result 382 states and 551 transitions. [2022-02-24 03:41:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 03:41:25,631 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 36 [2022-02-24 03:41:25,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:25,632 INFO L225 Difference]: With dead ends: 382 [2022-02-24 03:41:25,632 INFO L226 Difference]: Without dead ends: 270 [2022-02-24 03:41:25,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=391, Invalid=2471, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:41:25,633 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:25,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 81 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:41:25,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-24 03:41:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 147. [2022-02-24 03:41:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3309859154929577) internal successors, (189), 142 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 193 transitions. [2022-02-24 03:41:25,744 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 193 transitions. Word has length 36 [2022-02-24 03:41:25,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:25,744 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 193 transitions. [2022-02-24 03:41:25,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 03:41:25,744 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 193 transitions. [2022-02-24 03:41:25,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:41:25,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:25,745 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:25,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:41:25,745 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:25,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:25,745 INFO L85 PathProgramCache]: Analyzing trace with hash 784665945, now seen corresponding path program 4 times [2022-02-24 03:41:25,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:25,745 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260566330] [2022-02-24 03:41:25,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:25,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:25,828 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:26,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:26,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:26,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:26,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:26,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260566330] [2022-02-24 03:41:26,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1260566330] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:26,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:26,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:41:26,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38162558] [2022-02-24 03:41:26,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:26,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:41:26,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:26,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:41:26,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:41:26,421 INFO L87 Difference]: Start difference. First operand 147 states and 193 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 03:41:29,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:29,896 INFO L93 Difference]: Finished difference Result 271 states and 397 transitions. [2022-02-24 03:41:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:41:29,897 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 37 [2022-02-24 03:41:29,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:29,898 INFO L225 Difference]: With dead ends: 271 [2022-02-24 03:41:29,898 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 03:41:29,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:41:29,899 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 127 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:29,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 65 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:41:29,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 03:41:30,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 147. [2022-02-24 03:41:30,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 142 states have internal predecessors, (185), 3 states have call successors, (3), 3 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 03:41:30,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2022-02-24 03:41:30,022 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 37 [2022-02-24 03:41:30,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:30,022 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2022-02-24 03:41:30,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 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 03:41:30,022 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2022-02-24 03:41:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 03:41:30,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:30,023 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:30,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:41:30,023 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:30,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash -552778231, now seen corresponding path program 7 times [2022-02-24 03:41:30,023 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:30,023 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392807266] [2022-02-24 03:41:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:30,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:30,105 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:30,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:30,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:30,345 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 03:41:30,694 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:30,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392807266] [2022-02-24 03:41:30,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1392807266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:30,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:30,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:41:30,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335167686] [2022-02-24 03:41:30,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:30,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:41:30,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:30,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:41:30,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:41:30,696 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:41:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:41:37,297 INFO L93 Difference]: Finished difference Result 417 states and 584 transitions. [2022-02-24 03:41:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 03:41:37,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 03:41:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:41:37,301 INFO L225 Difference]: With dead ends: 417 [2022-02-24 03:41:37,301 INFO L226 Difference]: Without dead ends: 404 [2022-02-24 03:41:37,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=652, Invalid=3508, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 03:41:37,301 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 181 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:41:37,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 86 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:41:37,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-02-24 03:41:37,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 158. [2022-02-24 03:41:37,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2810457516339868) internal successors, (196), 153 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:41:37,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 200 transitions. [2022-02-24 03:41:37,435 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 200 transitions. Word has length 37 [2022-02-24 03:41:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:41:37,435 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 200 transitions. [2022-02-24 03:41:37,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:41:37,436 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 200 transitions. [2022-02-24 03:41:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 03:41:37,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:41:37,436 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:41:37,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:41:37,436 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:41:37,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:41:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash -352003804, now seen corresponding path program 9 times [2022-02-24 03:41:37,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:41:37,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480938011] [2022-02-24 03:41:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:41:37,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:41:37,553 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:41:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:38,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:41:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:41:38,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:41:38,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:41:38,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480938011] [2022-02-24 03:41:38,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480938011] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:41:38,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:41:38,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:41:38,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462792140] [2022-02-24 03:41:38,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:41:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:41:38,696 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:41:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:41:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:41:38,697 INFO L87 Difference]: Start difference. First operand 158 states and 200 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 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 03:42:32,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:32,885 INFO L93 Difference]: Finished difference Result 420 states and 600 transitions. [2022-02-24 03:42:32,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-02-24 03:42:32,886 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 03:42:32,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:32,887 INFO L225 Difference]: With dead ends: 420 [2022-02-24 03:42:32,887 INFO L226 Difference]: Without dead ends: 360 [2022-02-24 03:42:32,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23033 ImplicationChecksByTransitivity, 49.5s TimeCoverageRelationStatistics Valid=6187, Invalid=46943, Unknown=0, NotChecked=0, Total=53130 [2022-02-24 03:42:32,891 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 447 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:32,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 107 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-24 03:42:32,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-24 03:42:33,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 190. [2022-02-24 03:42:33,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.308108108108108) internal successors, (242), 185 states have internal predecessors, (242), 3 states have call successors, (3), 3 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 03:42:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 246 transitions. [2022-02-24 03:42:33,069 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 246 transitions. Word has length 38 [2022-02-24 03:42:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:33,069 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 246 transitions. [2022-02-24 03:42:33,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 2 states have call successors, (3), 3 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 03:42:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 246 transitions. [2022-02-24 03:42:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:42:33,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:33,069 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:33,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:42:33,070 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:33,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1004419833, now seen corresponding path program 10 times [2022-02-24 03:42:33,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:33,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090217815] [2022-02-24 03:42:33,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:33,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:33,189 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:42:33,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:33,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:33,940 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 03:42:34,738 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:34,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090217815] [2022-02-24 03:42:34,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2090217815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:34,738 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:34,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:42:34,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198942921] [2022-02-24 03:42:34,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:34,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:42:34,739 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:42:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:42:34,739 INFO L87 Difference]: Start difference. First operand 190 states and 246 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 03:42:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:42:39,798 INFO L93 Difference]: Finished difference Result 786 states and 1210 transitions. [2022-02-24 03:42:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:42:39,799 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 39 [2022-02-24 03:42:39,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:42:39,801 INFO L225 Difference]: With dead ends: 786 [2022-02-24 03:42:39,801 INFO L226 Difference]: Without dead ends: 746 [2022-02-24 03:42:39,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=273, Invalid=917, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:42:39,801 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 291 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:42:39,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 79 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:42:39,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 746 states. [2022-02-24 03:42:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 746 to 202. [2022-02-24 03:42:39,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.3045685279187818) internal successors, (257), 197 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:42:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 261 transitions. [2022-02-24 03:42:39,989 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 261 transitions. Word has length 39 [2022-02-24 03:42:39,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:42:39,989 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 261 transitions. [2022-02-24 03:42:39,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 03:42:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 261 transitions. [2022-02-24 03:42:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 03:42:39,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:42:39,990 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:42:39,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:42:39,990 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:42:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:42:39,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1674430901, now seen corresponding path program 11 times [2022-02-24 03:42:39,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:42:39,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [462161218] [2022-02-24 03:42:39,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:42:39,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:42:40,114 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:42:40,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:40,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:42:40,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:42:40,906 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 03:42:41,942 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:41,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [462161218] [2022-02-24 03:42:41,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [462161218] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:41,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:41,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:42:41,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308924332] [2022-02-24 03:42:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:41,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:42:41,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:42:41,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:42:41,943 INFO L87 Difference]: Start difference. First operand 202 states and 261 transitions. Second operand has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 03:43:45,057 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 03:45:19,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:19,204 INFO L93 Difference]: Finished difference Result 527 states and 772 transitions. [2022-02-24 03:45:19,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 273 states. [2022-02-24 03:45:19,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 03:45:19,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:19,207 INFO L225 Difference]: With dead ends: 527 [2022-02-24 03:45:19,207 INFO L226 Difference]: Without dead ends: 448 [2022-02-24 03:45:19,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39021 ImplicationChecksByTransitivity, 147.7s TimeCoverageRelationStatistics Valid=9513, Invalid=77217, Unknown=0, NotChecked=0, Total=86730 [2022-02-24 03:45:19,211 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 638 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 1078 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 638 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1078 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:19,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [638 Valid, 118 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1078 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2022-02-24 03:45:19,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-02-24 03:45:19,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 238. [2022-02-24 03:45:19,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.3261802575107295) internal successors, (309), 233 states have internal predecessors, (309), 3 states have call successors, (3), 3 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 03:45:19,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 313 transitions. [2022-02-24 03:45:19,465 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 313 transitions. Word has length 40 [2022-02-24 03:45:19,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:19,466 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 313 transitions. [2022-02-24 03:45:19,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.44) internal successors, (36), 24 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 03:45:19,466 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 313 transitions. [2022-02-24 03:45:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:45:19,467 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:19,467 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:19,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:45:19,467 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:19,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1046867033, now seen corresponding path program 7 times [2022-02-24 03:45:19,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:19,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570271558] [2022-02-24 03:45:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:19,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:19,550 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:24,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:24,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:24,429 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 03:45:26,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:26,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570271558] [2022-02-24 03:45:26,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1570271558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:26,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:26,623 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:45:26,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357057264] [2022-02-24 03:45:26,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:26,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:45:26,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:45:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:45:26,624 INFO L87 Difference]: Start difference. First operand 238 states and 313 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 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 03:45:35,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-24 03:45:37,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:37,329 INFO L93 Difference]: Finished difference Result 268 states and 357 transitions. [2022-02-24 03:45:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:45:37,333 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 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 41 [2022-02-24 03:45:37,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:37,334 INFO L225 Difference]: With dead ends: 268 [2022-02-24 03:45:37,334 INFO L226 Difference]: Without dead ends: 263 [2022-02-24 03:45:37,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=256, Invalid=2714, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:45:37,337 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:37,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 114 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 770 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2022-02-24 03:45:37,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-24 03:45:37,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 244. [2022-02-24 03:45:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.3221757322175731) internal successors, (316), 239 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:37,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 320 transitions. [2022-02-24 03:45:37,614 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 320 transitions. Word has length 41 [2022-02-24 03:45:37,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:37,615 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 320 transitions. [2022-02-24 03:45:37,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 27 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 03:45:37,615 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 320 transitions. [2022-02-24 03:45:37,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:45:37,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:37,619 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:37,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:45:37,620 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:37,620 INFO L85 PathProgramCache]: Analyzing trace with hash -600613752, now seen corresponding path program 12 times [2022-02-24 03:45:37,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:37,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773999288] [2022-02-24 03:45:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:37,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:37,708 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:37,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:39,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:39,632 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 03:45:41,383 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:41,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773999288] [2022-02-24 03:45:41,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [773999288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:41,383 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:41,384 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:45:41,384 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494867314] [2022-02-24 03:45:41,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:41,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:45:41,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:41,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:45:41,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:45:41,385 INFO L87 Difference]: Start difference. First operand 244 states and 320 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:45:50,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:50,273 INFO L93 Difference]: Finished difference Result 1040 states and 1650 transitions. [2022-02-24 03:45:50,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:45:50,274 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have 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 03:45:50,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:50,276 INFO L225 Difference]: With dead ends: 1040 [2022-02-24 03:45:50,276 INFO L226 Difference]: Without dead ends: 990 [2022-02-24 03:45:50,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=291, Invalid=1041, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:45:50,277 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 249 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:50,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 96 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:45:50,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-02-24 03:45:50,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 256. [2022-02-24 03:45:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.3147410358565736) internal successors, (330), 251 states have internal predecessors, (330), 3 states have call successors, (3), 3 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 03:45:50,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 334 transitions. [2022-02-24 03:45:50,557 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 334 transitions. Word has length 41 [2022-02-24 03:45:50,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:50,557 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 334 transitions. [2022-02-24 03:45:50,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:45:50,557 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 334 transitions. [2022-02-24 03:45:50,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:45:50,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:50,558 INFO L514 BasicCegarLoop]: trace histogram [9, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:50,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:45:50,558 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:50,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:50,558 INFO L85 PathProgramCache]: Analyzing trace with hash -936810167, now seen corresponding path program 8 times [2022-02-24 03:45:50,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:50,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458464315] [2022-02-24 03:45:50,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:50,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:50,688 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:45:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:51,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:51,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:51,461 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 03:45:52,999 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:52,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458464315] [2022-02-24 03:45:52,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1458464315] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:52,999 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:52,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:45:52,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702867315] [2022-02-24 03:45:52,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:53,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:45:53,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:53,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:45:53,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:45:53,000 INFO L87 Difference]: Start difference. First operand 256 states and 334 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 03:46:11,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:11,124 INFO L93 Difference]: Finished difference Result 589 states and 877 transitions. [2022-02-24 03:46:11,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:46:11,125 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 41 [2022-02-24 03:46:11,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:11,127 INFO L225 Difference]: With dead ends: 589 [2022-02-24 03:46:11,127 INFO L226 Difference]: Without dead ends: 464 [2022-02-24 03:46:11,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1362 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=603, Invalid=4367, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 03:46:11,128 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 934 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:11,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 97 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 934 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-24 03:46:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-02-24 03:46:11,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 235. [2022-02-24 03:46:11,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.3217391304347825) internal successors, (304), 230 states have internal predecessors, (304), 3 states have call successors, (3), 3 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 03:46:11,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 308 transitions. [2022-02-24 03:46:11,401 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 308 transitions. Word has length 41 [2022-02-24 03:46:11,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:11,401 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 308 transitions. [2022-02-24 03:46:11,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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 03:46:11,401 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 308 transitions. [2022-02-24 03:46:11,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:46:11,402 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:11,402 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:11,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:46:11,402 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:11,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash -602563943, now seen corresponding path program 9 times [2022-02-24 03:46:11,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:11,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604420028] [2022-02-24 03:46:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:11,527 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:11,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:12,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:12,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:12,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:14,324 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:14,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604420028] [2022-02-24 03:46:14,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [604420028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:14,325 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:14,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:46:14,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355967252] [2022-02-24 03:46:14,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:14,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:46:14,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:14,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:46:14,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:46:14,326 INFO L87 Difference]: Start difference. First operand 235 states and 308 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:36,731 INFO L93 Difference]: Finished difference Result 682 states and 1008 transitions. [2022-02-24 03:46:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 03:46:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 03:46:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:36,735 INFO L225 Difference]: With dead ends: 682 [2022-02-24 03:46:36,735 INFO L226 Difference]: Without dead ends: 667 [2022-02-24 03:46:36,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2026 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=995, Invalid=5811, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 03:46:36,736 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 173 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1107 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 1107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:36,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 99 Invalid, 1424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [317 Valid, 1107 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-24 03:46:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-24 03:46:37,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 248. [2022-02-24 03:46:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.3045267489711934) internal successors, (317), 243 states have internal predecessors, (317), 3 states have call successors, (3), 3 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 03:46:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 321 transitions. [2022-02-24 03:46:37,017 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 321 transitions. Word has length 41 [2022-02-24 03:46:37,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:37,017 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 321 transitions. [2022-02-24 03:46:37,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:37,017 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 321 transitions. [2022-02-24 03:46:37,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:46:37,018 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:37,018 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:37,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:46:37,018 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:37,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:37,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1383374916, now seen corresponding path program 8 times [2022-02-24 03:46:37,019 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:37,019 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224071528] [2022-02-24 03:46:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:37,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:37,142 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:37,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:37,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:37,675 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 03:46:38,712 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:38,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224071528] [2022-02-24 03:46:38,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224071528] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:38,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:38,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:46:38,713 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601647340] [2022-02-24 03:46:38,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:38,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:46:38,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:38,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:46:38,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:46:38,713 INFO L87 Difference]: Start difference. First operand 248 states and 321 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:46:46,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:46,621 INFO L93 Difference]: Finished difference Result 523 states and 745 transitions. [2022-02-24 03:46:46,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:46:46,624 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have 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 03:46:46,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:46,626 INFO L225 Difference]: With dead ends: 523 [2022-02-24 03:46:46,626 INFO L226 Difference]: Without dead ends: 491 [2022-02-24 03:46:46,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=305, Invalid=1335, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:46:46,627 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:46,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 68 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:46:46,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-02-24 03:46:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 227. [2022-02-24 03:46:46,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.3108108108108107) internal successors, (291), 222 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:46,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 295 transitions. [2022-02-24 03:46:46,887 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 295 transitions. Word has length 42 [2022-02-24 03:46:46,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:46,888 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 295 transitions. [2022-02-24 03:46:46,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 3 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 03:46:46,888 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 295 transitions. [2022-02-24 03:46:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 03:46:46,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:46,888 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:46,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:46:46,888 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash 29751636, now seen corresponding path program 5 times [2022-02-24 03:46:46,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:46,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843406952] [2022-02-24 03:46:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:46,976 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,908 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 03:46:49,655 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:49,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843406952] [2022-02-24 03:46:49,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [843406952] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:49,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:49,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:46:49,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449252487] [2022-02-24 03:46:49,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:49,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:46:49,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:49,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:46:49,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:46:49,657 INFO L87 Difference]: Start difference. First operand 227 states and 295 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 2 states have call successors, (3), 3 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 03:47:06,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:06,058 INFO L93 Difference]: Finished difference Result 456 states and 684 transitions. [2022-02-24 03:47:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 03:47:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have 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 03:47:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:06,063 INFO L225 Difference]: With dead ends: 456 [2022-02-24 03:47:06,063 INFO L226 Difference]: Without dead ends: 451 [2022-02-24 03:47:06,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1641 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=664, Invalid=4448, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:47:06,064 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 155 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:06,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 80 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 03:47:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-24 03:47:06,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 227. [2022-02-24 03:47:06,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.2882882882882882) internal successors, (286), 222 states have internal predecessors, (286), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:06,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 290 transitions. [2022-02-24 03:47:06,324 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 290 transitions. Word has length 42 [2022-02-24 03:47:06,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:06,324 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 290 transitions. [2022-02-24 03:47:06,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 2 states have call successors, (3), 3 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 03:47:06,325 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 290 transitions. [2022-02-24 03:47:06,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 03:47:06,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:06,325 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:06,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:47:06,325 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:06,325 INFO L85 PathProgramCache]: Analyzing trace with hash 862732935, now seen corresponding path program 13 times [2022-02-24 03:47:06,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:06,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403680621] [2022-02-24 03:47:06,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:06,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:06,411 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:47:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:08,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:08,877 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 03:47:12,111 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:12,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403680621] [2022-02-24 03:47:12,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [403680621] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:12,111 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:12,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:47:12,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573545307] [2022-02-24 03:47:12,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:12,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:47:12,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:12,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:47:12,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:47:12,112 INFO L87 Difference]: Start difference. First operand 227 states and 290 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 03:54:24,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:24,110 INFO L93 Difference]: Finished difference Result 670 states and 977 transitions. [2022-02-24 03:54:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 378 states. [2022-02-24 03:54:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 43 [2022-02-24 03:54:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:24,113 INFO L225 Difference]: With dead ends: 670 [2022-02-24 03:54:24,113 INFO L226 Difference]: Without dead ends: 581 [2022-02-24 03:54:24,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75349 ImplicationChecksByTransitivity, 417.0s TimeCoverageRelationStatistics Valid=17253, Invalid=144753, Unknown=0, NotChecked=0, Total=162006 [2022-02-24 03:54:24,119 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 871 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 1596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 3062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1596 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:24,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 127 Invalid, 3062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1596 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 18.6s Time] [2022-02-24 03:54:24,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2022-02-24 03:54:24,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 266. [2022-02-24 03:54:24,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.3103448275862069) internal successors, (342), 261 states have internal predecessors, (342), 3 states have call successors, (3), 3 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 03:54:24,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 346 transitions. [2022-02-24 03:54:24,459 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 346 transitions. Word has length 43 [2022-02-24 03:54:24,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:24,460 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 346 transitions. [2022-02-24 03:54:24,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 27 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 03:54:24,460 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 346 transitions. [2022-02-24 03:54:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:54:24,460 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:24,460 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:24,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:54:24,460 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:24,461 INFO L85 PathProgramCache]: Analyzing trace with hash 6553078, now seen corresponding path program 14 times [2022-02-24 03:54:24,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:24,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342925394] [2022-02-24 03:54:24,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:24,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:24,553 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:54:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:28,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:28,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:33,181 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:33,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342925394] [2022-02-24 03:54:33,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342925394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:33,181 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:33,181 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:54:33,181 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681280921] [2022-02-24 03:54:33,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:33,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:54:33,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:33,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:54:33,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:54:33,182 INFO L87 Difference]: Start difference. First operand 266 states and 346 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 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)