/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:27:02,938 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:27:02,939 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:27:02,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:27:03,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:27:03,012 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:27:03,012 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:27:03,013 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:27:03,013 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:27:03,013 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:27:03,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:27:03,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:27:03,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:27:03,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:27:03,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:27:03,014 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:27:03,014 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:27:03,014 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:27:03,015 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:27:03,015 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:27:03,015 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:27:03,015 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:27:03,015 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:27:03,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:27:03,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:27:03,016 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:27:03,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:27:03,016 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:27:03,016 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:27:03,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:27:03,171 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:27:03,173 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:27:03,173 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:27:03,174 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:27:03,174 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-01-31 21:27:03,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7908afef/c6770ad5e5bd49218556a7640708878b/FLAGc0bb812ac [2022-01-31 21:27:03,601 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:27:03,601 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2022-01-31 21:27:03,604 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7908afef/c6770ad5e5bd49218556a7640708878b/FLAGc0bb812ac [2022-01-31 21:27:03,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7908afef/c6770ad5e5bd49218556a7640708878b [2022-01-31 21:27:03,615 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:27:03,616 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:27:03,617 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:27:03,617 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:27:03,620 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:27:03,621 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,621 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e721af4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03, skipping insertion in model container [2022-01-31 21:27:03,621 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:27:03,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:27:03,717 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/mono-crafted_6.c[318,331] [2022-01-31 21:27:03,745 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:27:03,751 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:27:03,757 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/mono-crafted_6.c[318,331] [2022-01-31 21:27:03,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:27:03,768 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:27:03,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03 WrapperNode [2022-01-31 21:27:03,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:27:03,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:27:03,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:27:03,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:27:03,775 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,775 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,783 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:27:03,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:27:03,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:27:03,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:27:03,785 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (1/1) ... [2022-01-31 21:27:03,794 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:27:03,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:27:03,812 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 21:27:03,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 21:27:03,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:27:03,839 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:27:03,839 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:27:03,839 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:27:03,839 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:27:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:27:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:27:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:27:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:27:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:27:03,840 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:27:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:27:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:27:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:27:03,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:27:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:27:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:27:03,889 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:27:03,891 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:27:03,996 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:27:04,000 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:27:04,000 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 21:27:04,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:27:04 BoogieIcfgContainer [2022-01-31 21:27:04,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:27:04,003 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:27:04,003 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:27:04,006 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:27:04,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:27:03" (1/3) ... [2022-01-31 21:27:04,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a52ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:27:04, skipping insertion in model container [2022-01-31 21:27:04,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:27:03" (2/3) ... [2022-01-31 21:27:04,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a52ab5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:27:04, skipping insertion in model container [2022-01-31 21:27:04,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:27:04" (3/3) ... [2022-01-31 21:27:04,008 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2022-01-31 21:27:04,011 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:27:04,011 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:27:04,044 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:27:04,051 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 21:27:04,051 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:27:04,064 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 21:27:04,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-01-31 21:27:04,077 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:04,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:04,079 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:04,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:04,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1440262230, now seen corresponding path program 1 times [2022-01-31 21:27:04,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:04,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113095077] [2022-01-31 21:27:04,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:04,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:04,132 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:27:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:04,255 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:04,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113095077] [2022-01-31 21:27:04,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1113095077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:04,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:04,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 21:27:04,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562735857] [2022-01-31 21:27:04,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:04,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 21:27:04,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:04,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 21:27:04,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 21:27:04,277 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:04,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:04,331 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-01-31 21:27:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 21:27:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-01-31 21:27:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:04,337 INFO L225 Difference]: With dead ends: 40 [2022-01-31 21:27:04,338 INFO L226 Difference]: Without dead ends: 17 [2022-01-31 21:27:04,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:27:04,344 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:04,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:04,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-01-31 21:27:04,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-01-31 21:27:04,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-01-31 21:27:04,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-01-31 21:27:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:04,383 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-01-31 21:27:04,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-01-31 21:27:04,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 21:27:04,385 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:04,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:04,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:27:04,386 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:04,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:04,386 INFO L85 PathProgramCache]: Analyzing trace with hash -273622713, now seen corresponding path program 1 times [2022-01-31 21:27:04,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:04,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048828111] [2022-01-31 21:27:04,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:04,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:04,491 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:27:04,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:04,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:04,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048828111] [2022-01-31 21:27:04,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048828111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:04,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:04,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 21:27:04,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487970510] [2022-01-31 21:27:04,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:04,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 21:27:04,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:04,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 21:27:04,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:27:04,644 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:04,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:04,708 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-01-31 21:27:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 21:27:04,709 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 21:27:04,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:04,709 INFO L225 Difference]: With dead ends: 29 [2022-01-31 21:27:04,709 INFO L226 Difference]: Without dead ends: 20 [2022-01-31 21:27:04,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:27:04,713 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:04,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:04,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-01-31 21:27:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-01-31 21:27:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2022-01-31 21:27:04,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-01-31 21:27:04,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-01-31 21:27:04,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:04,729 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-01-31 21:27:04,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:04,729 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-01-31 21:27:04,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 21:27:04,730 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:04,730 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:04,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:27:04,730 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:04,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:04,732 INFO L85 PathProgramCache]: Analyzing trace with hash -88759266, now seen corresponding path program 1 times [2022-01-31 21:27:04,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:04,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408411988] [2022-01-31 21:27:04,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:04,781 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:04,782 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:27:04,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:04,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:04,921 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:04,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:04,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:05,059 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:05,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408411988] [2022-01-31 21:27:05,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1408411988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:05,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:05,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:27:05,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719713653] [2022-01-31 21:27:05,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:05,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:27:05,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:05,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:27:05,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:27:05,061 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-01-31 21:27:05,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:05,157 INFO L93 Difference]: Finished difference Result 33 states and 41 transitions. [2022-01-31 21:27:05,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 21:27:05,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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 [2022-01-31 21:27:05,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:05,159 INFO L225 Difference]: With dead ends: 33 [2022-01-31 21:27:05,159 INFO L226 Difference]: Without dead ends: 24 [2022-01-31 21:27:05,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:27:05,165 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:05,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:05,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-31 21:27:05,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-31 21:27:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:05,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-01-31 21:27:05,174 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2022-01-31 21:27:05,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:05,174 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-01-31 21:27:05,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 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) [2022-01-31 21:27:05,175 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-01-31 21:27:05,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-31 21:27:05,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:05,175 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:05,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:27:05,175 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:05,176 INFO L85 PathProgramCache]: Analyzing trace with hash 236661621, now seen corresponding path program 2 times [2022-01-31 21:27:05,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:05,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284749211] [2022-01-31 21:27:05,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:05,232 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,255 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,255 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:05,287 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,350 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,351 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:05,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:05,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:05,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:05,458 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:05,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284749211] [2022-01-31 21:27:05,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [284749211] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:05,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:05,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:27:05,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487713574] [2022-01-31 21:27:05,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:05,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:27:05,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:05,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:27:05,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:27:05,459 INFO L87 Difference]: Start difference. First operand 24 states and 27 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) [2022-01-31 21:27:05,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:05,557 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-01-31 21:27:05,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:27:05,557 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 [2022-01-31 21:27:05,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:05,558 INFO L225 Difference]: With dead ends: 37 [2022-01-31 21:27:05,558 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 21:27:05,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:27:05,562 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:05,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 36 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:27:05,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 21:27:05,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-31 21:27:05,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:05,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-01-31 21:27:05,572 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2022-01-31 21:27:05,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:05,572 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-01-31 21:27:05,572 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) [2022-01-31 21:27:05,573 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-01-31 21:27:05,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 21:27:05,574 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:05,574 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:05,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:27:05,575 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:05,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1513041740, now seen corresponding path program 3 times [2022-01-31 21:27:05,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:05,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874426862] [2022-01-31 21:27:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:05,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,684 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:05,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:05,754 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:05,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:05,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:05,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:05,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:05,869 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:05,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874426862] [2022-01-31 21:27:05,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1874426862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:05,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:05,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:27:05,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334120779] [2022-01-31 21:27:05,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:05,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:27:05,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:05,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:27:05,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:27:05,887 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:06,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:06,021 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-01-31 21:27:06,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:27:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-01-31 21:27:06,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:06,026 INFO L225 Difference]: With dead ends: 41 [2022-01-31 21:27:06,026 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 21:27:06,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:27:06,027 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:06,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 42 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:06,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 21:27:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 21:27:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-01-31 21:27:06,033 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-01-31 21:27:06,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:06,034 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-01-31 21:27:06,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:06,034 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-01-31 21:27:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-31 21:27:06,035 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:06,035 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:06,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:27:06,036 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:06,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:06,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1302368349, now seen corresponding path program 4 times [2022-01-31 21:27:06,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [771544956] [2022-01-31 21:27:06,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:06,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,123 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,123 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:06,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,197 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,198 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:06,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:06,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:06,326 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:06,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [771544956] [2022-01-31 21:27:06,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [771544956] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:06,326 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:06,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:27:06,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878348803] [2022-01-31 21:27:06,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:27:06,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:27:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:27:06,327 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-31 21:27:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:06,490 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2022-01-31 21:27:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:27:06,491 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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 29 [2022-01-31 21:27:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:06,491 INFO L225 Difference]: With dead ends: 45 [2022-01-31 21:27:06,491 INFO L226 Difference]: Without dead ends: 36 [2022-01-31 21:27:06,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:27:06,492 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:06,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 48 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-01-31 21:27:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-01-31 21:27:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2022-01-31 21:27:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-01-31 21:27:06,496 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2022-01-31 21:27:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:06,496 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-01-31 21:27:06,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 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) [2022-01-31 21:27:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-01-31 21:27:06,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-01-31 21:27:06,497 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:06,497 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:06,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:27:06,497 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:06,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:06,497 INFO L85 PathProgramCache]: Analyzing trace with hash -46551942, now seen corresponding path program 5 times [2022-01-31 21:27:06,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:06,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205540989] [2022-01-31 21:27:06,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:06,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,606 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,607 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:06,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,688 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:06,688 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:06,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:06,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:06,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:06,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:06,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205540989] [2022-01-31 21:27:06,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1205540989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:06,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:06,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:27:06,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112261767] [2022-01-31 21:27:06,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:06,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:27:06,836 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:06,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:27:06,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:27:06,837 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2022-01-31 21:27:06,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:06,992 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2022-01-31 21:27:06,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:27:06,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 [2022-01-31 21:27:06,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:06,993 INFO L225 Difference]: With dead ends: 49 [2022-01-31 21:27:06,993 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 21:27:06,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:27:06,994 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:06,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 49 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:06,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 21:27:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 21:27:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-01-31 21:27:06,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2022-01-31 21:27:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:06,998 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-01-31 21:27:06,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2022-01-31 21:27:06,998 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-01-31 21:27:06,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-31 21:27:06,999 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:06,999 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:06,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:27:06,999 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:06,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1536449071, now seen corresponding path program 6 times [2022-01-31 21:27:06,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:07,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884893310] [2022-01-31 21:27:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:07,060 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,096 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,096 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:07,117 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,183 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:07,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:07,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:07,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:07,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:07,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884893310] [2022-01-31 21:27:07,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [884893310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:07,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:07,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:27:07,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272823641] [2022-01-31 21:27:07,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:07,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:27:07,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:27:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:27:07,326 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:07,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:07,528 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-01-31 21:27:07,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:27:07,528 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-01-31 21:27:07,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:07,529 INFO L225 Difference]: With dead ends: 53 [2022-01-31 21:27:07,529 INFO L226 Difference]: Without dead ends: 44 [2022-01-31 21:27:07,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:27:07,530 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 35 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:07,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 55 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:07,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-31 21:27:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-01-31 21:27:07,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-01-31 21:27:07,534 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2022-01-31 21:27:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:07,534 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-01-31 21:27:07,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-01-31 21:27:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:27:07,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:07,535 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:07,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:27:07,535 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:07,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash 79895464, now seen corresponding path program 7 times [2022-01-31 21:27:07,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:07,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863941031] [2022-01-31 21:27:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:07,579 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,609 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,609 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:07,629 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:07,698 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:07,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:07,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:07,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:07,865 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:07,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863941031] [2022-01-31 21:27:07,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863941031] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:07,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:07,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:27:07,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635732687] [2022-01-31 21:27:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:07,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:27:07,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:27:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:27:07,866 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:08,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:08,093 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-01-31 21:27:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:27:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2022-01-31 21:27:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:08,106 INFO L225 Difference]: With dead ends: 57 [2022-01-31 21:27:08,106 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 21:27:08,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:27:08,107 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:08,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 71 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:27:08,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 21:27:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 21:27:08,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-01-31 21:27:08,111 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2022-01-31 21:27:08,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:08,111 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-01-31 21:27:08,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:08,111 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-01-31 21:27:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 21:27:08,114 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:08,114 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:08,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:27:08,114 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:08,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:08,115 INFO L85 PathProgramCache]: Analyzing trace with hash -567423489, now seen corresponding path program 8 times [2022-01-31 21:27:08,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:08,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32162427] [2022-01-31 21:27:08,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:08,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,195 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:08,214 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,270 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:08,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:08,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:08,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32162427] [2022-01-31 21:27:08,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [32162427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:08,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:08,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:27:08,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671353554] [2022-01-31 21:27:08,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:08,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:27:08,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:27:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-01-31 21:27:08,432 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:08,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:08,707 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2022-01-31 21:27:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:27:08,708 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 21:27:08,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:08,708 INFO L225 Difference]: With dead ends: 61 [2022-01-31 21:27:08,708 INFO L226 Difference]: Without dead ends: 52 [2022-01-31 21:27:08,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:27:08,709 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:08,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 72 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-01-31 21:27:08,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-01-31 21:27:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-01-31 21:27:08,713 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-01-31 21:27:08,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:08,713 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-01-31 21:27:08,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-01-31 21:27:08,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 21:27:08,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:08,714 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:08,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:27:08,714 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:08,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:08,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1011254058, now seen corresponding path program 9 times [2022-01-31 21:27:08,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:08,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292676587] [2022-01-31 21:27:08,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:08,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,783 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:08,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:08,870 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:08,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:08,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:08,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:08,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:09,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:09,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292676587] [2022-01-31 21:27:09,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [292676587] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:09,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:09,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:27:09,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131389118] [2022-01-31 21:27:09,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:09,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:27:09,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:27:09,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:27:09,054 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:09,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:09,364 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2022-01-31 21:27:09,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:27:09,365 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 21:27:09,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:09,365 INFO L225 Difference]: With dead ends: 65 [2022-01-31 21:27:09,365 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 21:27:09,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:27:09,366 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 43 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:09,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 78 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:09,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 21:27:09,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 21:27:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-01-31 21:27:09,370 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2022-01-31 21:27:09,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:09,370 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-01-31 21:27:09,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:09,370 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-01-31 21:27:09,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:27:09,371 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:09,371 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:09,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:27:09,371 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:09,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:09,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1953241043, now seen corresponding path program 10 times [2022-01-31 21:27:09,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:09,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320409622] [2022-01-31 21:27:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:09,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:09,476 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:09,476 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:09,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:09,544 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:09,545 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:09,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:09,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:09,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:09,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:09,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:09,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320409622] [2022-01-31 21:27:09,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320409622] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:09,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:09,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 21:27:09,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056930627] [2022-01-31 21:27:09,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:09,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 21:27:09,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:09,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 21:27:09,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2022-01-31 21:27:09,730 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:10,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:10,068 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-01-31 21:27:10,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 21:27:10,068 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:27:10,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:10,069 INFO L225 Difference]: With dead ends: 69 [2022-01-31 21:27:10,069 INFO L226 Difference]: Without dead ends: 60 [2022-01-31 21:27:10,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=860, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:27:10,070 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:10,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 84 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-01-31 21:27:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-01-31 21:27:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-01-31 21:27:10,074 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2022-01-31 21:27:10,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:10,074 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-01-31 21:27:10,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0625) internal successors, (49), 15 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:10,075 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-01-31 21:27:10,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 21:27:10,075 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:10,075 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:10,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:27:10,075 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:10,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:10,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1089810428, now seen corresponding path program 11 times [2022-01-31 21:27:10,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:10,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136234045] [2022-01-31 21:27:10,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:10,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,134 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:10,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,216 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:10,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:10,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:10,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:10,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136234045] [2022-01-31 21:27:10,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [136234045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:10,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:10,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 21:27:10,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426089506] [2022-01-31 21:27:10,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:10,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 21:27:10,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:10,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 21:27:10,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:27:10,405 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:10,775 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2022-01-31 21:27:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 21:27:10,775 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 21:27:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:10,776 INFO L225 Difference]: With dead ends: 73 [2022-01-31 21:27:10,776 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 21:27:10,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:27:10,777 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:10,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 85 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 21:27:10,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 21:27:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 21:27:10,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:10,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-01-31 21:27:10,781 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2022-01-31 21:27:10,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:10,781 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-01-31 21:27:10,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:10,782 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-01-31 21:27:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:27:10,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:10,782 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:10,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:27:10,782 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:10,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:10,783 INFO L85 PathProgramCache]: Analyzing trace with hash 176944219, now seen corresponding path program 12 times [2022-01-31 21:27:10,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:10,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686955895] [2022-01-31 21:27:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:10,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,874 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:10,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,948 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:10,948 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:10,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:10,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:11,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:11,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686955895] [2022-01-31 21:27:11,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [686955895] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:11,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:11,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 21:27:11,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350932119] [2022-01-31 21:27:11,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:11,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 21:27:11,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:11,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 21:27:11,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-31 21:27:11,192 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:11,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:11,631 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2022-01-31 21:27:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 21:27:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:27:11,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:11,632 INFO L225 Difference]: With dead ends: 77 [2022-01-31 21:27:11,632 INFO L226 Difference]: Without dead ends: 68 [2022-01-31 21:27:11,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:27:11,633 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 53 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:11,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 91 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:27:11,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-01-31 21:27:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-01-31 21:27:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-01-31 21:27:11,637 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2022-01-31 21:27:11,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:11,637 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-01-31 21:27:11,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:11,638 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-01-31 21:27:11,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:27:11,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:11,638 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:11,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:27:11,638 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:11,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:11,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1381690062, now seen corresponding path program 13 times [2022-01-31 21:27:11,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:11,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712877516] [2022-01-31 21:27:11,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:11,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:11,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:11,694 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:11,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:11,774 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:11,774 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:11,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:11,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:11,997 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:11,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712877516] [2022-01-31 21:27:11,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [712877516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:11,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:11,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 21:27:11,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770013010] [2022-01-31 21:27:11,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:11,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 21:27:11,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:11,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 21:27:11,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:27:11,998 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:12,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:12,502 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2022-01-31 21:27:12,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 21:27:12,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:27:12,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:12,503 INFO L225 Difference]: With dead ends: 81 [2022-01-31 21:27:12,503 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 21:27:12,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:27:12,506 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:12,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 102 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:27:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 21:27:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-31 21:27:12,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:12,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-01-31 21:27:12,514 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2022-01-31 21:27:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:12,515 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-01-31 21:27:12,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-01-31 21:27:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:27:12,515 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:12,515 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:12,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:27:12,516 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:12,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:12,516 INFO L85 PathProgramCache]: Analyzing trace with hash -352062839, now seen corresponding path program 14 times [2022-01-31 21:27:12,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:12,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318652650] [2022-01-31 21:27:12,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:12,590 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:12,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:12,616 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:12,641 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:12,696 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:12,696 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:12,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:12,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:12,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:12,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:12,993 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:12,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318652650] [2022-01-31 21:27:12,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318652650] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:12,993 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:12,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:27:12,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120403937] [2022-01-31 21:27:12,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:12,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:27:12,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:12,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:27:12,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:27:12,994 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:13,642 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2022-01-31 21:27:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 21:27:13,642 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:27:13,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:13,642 INFO L225 Difference]: With dead ends: 85 [2022-01-31 21:27:13,642 INFO L226 Difference]: Without dead ends: 76 [2022-01-31 21:27:13,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:27:13,644 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 58 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:13,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 128 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1364 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:27:13,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-01-31 21:27:13,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-01-31 21:27:13,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-01-31 21:27:13,650 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2022-01-31 21:27:13,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:13,651 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-01-31 21:27:13,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 21 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-01-31 21:27:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:27:13,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:13,651 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:13,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:27:13,652 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:13,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:13,652 INFO L85 PathProgramCache]: Analyzing trace with hash 2021018720, now seen corresponding path program 15 times [2022-01-31 21:27:13,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:13,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880663556] [2022-01-31 21:27:13,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:13,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,714 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:13,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,786 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:13,787 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:13,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:13,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:13,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:14,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:14,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880663556] [2022-01-31 21:27:14,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880663556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:14,043 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:14,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 21:27:14,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121916360] [2022-01-31 21:27:14,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:14,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 21:27:14,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:14,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 21:27:14,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:27:14,044 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:14,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:14,618 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2022-01-31 21:27:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 21:27:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:27:14,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:14,619 INFO L225 Difference]: With dead ends: 89 [2022-01-31 21:27:14,619 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 21:27:14,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=1550, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:27:14,620 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 61 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:14,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 114 Invalid, 1250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:27:14,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 21:27:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-31 21:27:14,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:14,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-01-31 21:27:14,624 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2022-01-31 21:27:14,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:14,624 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-01-31 21:27:14,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 20 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:14,624 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-01-31 21:27:14,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:27:14,625 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:14,625 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:14,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:27:14,625 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:14,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:14,625 INFO L85 PathProgramCache]: Analyzing trace with hash -286661961, now seen corresponding path program 16 times [2022-01-31 21:27:14,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:14,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784648568] [2022-01-31 21:27:14,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:14,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:14,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:14,705 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:14,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:14,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:14,769 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:14,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:14,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:15,045 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:15,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784648568] [2022-01-31 21:27:15,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784648568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:15,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:15,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 21:27:15,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360576793] [2022-01-31 21:27:15,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:15,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 21:27:15,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:15,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 21:27:15,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-01-31 21:27:15,046 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:15,683 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-01-31 21:27:15,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 21:27:15,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:27:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:15,684 INFO L225 Difference]: With dead ends: 93 [2022-01-31 21:27:15,684 INFO L226 Difference]: Without dead ends: 84 [2022-01-31 21:27:15,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=1712, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:27:15,685 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 64 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1372 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:15,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 120 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1372 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:27:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-01-31 21:27:15,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-01-31 21:27:15,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:15,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-01-31 21:27:15,689 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 77 [2022-01-31 21:27:15,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:15,689 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-01-31 21:27:15,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-01-31 21:27:15,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:27:15,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:15,690 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:15,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:27:15,690 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:15,690 INFO L85 PathProgramCache]: Analyzing trace with hash 980186510, now seen corresponding path program 17 times [2022-01-31 21:27:15,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:15,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26025451] [2022-01-31 21:27:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:15,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:15,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:15,755 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:15,777 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:15,828 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:15,828 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:15,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:16,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:16,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26025451] [2022-01-31 21:27:16,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [26025451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:16,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:16,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 21:27:16,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598591308] [2022-01-31 21:27:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:16,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 21:27:16,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:16,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 21:27:16,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:27:16,125 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:16,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:16,790 INFO L93 Difference]: Finished difference Result 97 states and 105 transitions. [2022-01-31 21:27:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 21:27:16,790 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:27:16,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:16,793 INFO L225 Difference]: With dead ends: 97 [2022-01-31 21:27:16,793 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 21:27:16,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=1882, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:27:16,794 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 68 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:16,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 121 Invalid, 1472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:27:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 21:27:16,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-01-31 21:27:16,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-01-31 21:27:16,798 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2022-01-31 21:27:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:16,798 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-01-31 21:27:16,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.347826086956522) internal successors, (77), 22 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-01-31 21:27:16,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 21:27:16,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:16,799 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:16,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:27:16,799 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:16,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash 170640613, now seen corresponding path program 18 times [2022-01-31 21:27:16,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:16,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112739184] [2022-01-31 21:27:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:16,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:16,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:16,875 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:16,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:16,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:16,947 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:16,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:16,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:16,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:17,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:17,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112739184] [2022-01-31 21:27:17,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [112739184] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:17,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:17,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 21:27:17,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450126312] [2022-01-31 21:27:17,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:17,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 21:27:17,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:17,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 21:27:17,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-01-31 21:27:17,263 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:18,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:18,030 INFO L93 Difference]: Finished difference Result 101 states and 109 transitions. [2022-01-31 21:27:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 21:27:18,030 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 21:27:18,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:18,030 INFO L225 Difference]: With dead ends: 101 [2022-01-31 21:27:18,030 INFO L226 Difference]: Without dead ends: 92 [2022-01-31 21:27:18,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=2024, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:27:18,031 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 70 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1765 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:18,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 137 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1765 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:27:18,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-01-31 21:27:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-01-31 21:27:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-01-31 21:27:18,036 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2022-01-31 21:27:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:18,036 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-01-31 21:27:18,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:18,036 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-01-31 21:27:18,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-01-31 21:27:18,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:18,037 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:18,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:27:18,037 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:18,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1081446588, now seen corresponding path program 19 times [2022-01-31 21:27:18,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:18,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128300939] [2022-01-31 21:27:18,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:18,101 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:18,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:18,126 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:18,158 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:18,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:18,208 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:18,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:18,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:18,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:18,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:18,535 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:18,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128300939] [2022-01-31 21:27:18,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128300939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:18,536 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:18,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 21:27:18,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006241588] [2022-01-31 21:27:18,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:18,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 21:27:18,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:18,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 21:27:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:27:18,537 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:19,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:19,375 INFO L93 Difference]: Finished difference Result 105 states and 113 transitions. [2022-01-31 21:27:19,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 21:27:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-01-31 21:27:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:19,379 INFO L225 Difference]: With dead ends: 105 [2022-01-31 21:27:19,380 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 21:27:19,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=2246, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:27:19,382 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 73 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1852 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:19,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 138 Invalid, 1878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1852 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:27:19,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 21:27:19,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-31 21:27:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-01-31 21:27:19,387 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2022-01-31 21:27:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:19,387 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-01-31 21:27:19,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.4) internal successors, (85), 24 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-01-31 21:27:19,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-01-31 21:27:19,388 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:19,388 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:19,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:27:19,388 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:19,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:19,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1656199443, now seen corresponding path program 20 times [2022-01-31 21:27:19,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:19,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310690537] [2022-01-31 21:27:19,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:19,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:19,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:19,466 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:19,492 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:19,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:19,554 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:19,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:19,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:19,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:19,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310690537] [2022-01-31 21:27:19,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1310690537] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:19,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:19,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 21:27:19,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522985204] [2022-01-31 21:27:19,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:19,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 21:27:19,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:19,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 21:27:19,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-01-31 21:27:19,913 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:20,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:20,767 INFO L93 Difference]: Finished difference Result 109 states and 117 transitions. [2022-01-31 21:27:20,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 21:27:20,768 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-01-31 21:27:20,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:20,769 INFO L225 Difference]: With dead ends: 109 [2022-01-31 21:27:20,769 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 21:27:20,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=2400, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:27:20,770 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 77 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1942 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 1969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:20,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 139 Invalid, 1969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1942 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:27:20,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 21:27:20,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-01-31 21:27:20,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:20,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-01-31 21:27:20,774 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 93 [2022-01-31 21:27:20,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:20,774 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-01-31 21:27:20,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 25 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:20,774 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-01-31 21:27:20,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-01-31 21:27:20,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:20,774 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:20,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:27:20,775 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:20,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:20,775 INFO L85 PathProgramCache]: Analyzing trace with hash 159358442, now seen corresponding path program 21 times [2022-01-31 21:27:20,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:20,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301524270] [2022-01-31 21:27:20,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:20,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:20,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:20,859 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:20,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:20,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:20,917 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:20,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:20,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:21,289 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:21,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301524270] [2022-01-31 21:27:21,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [301524270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:21,290 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:21,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 21:27:21,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818402909] [2022-01-31 21:27:21,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:21,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 21:27:21,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:21,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 21:27:21,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-01-31 21:27:21,291 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:22,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:22,223 INFO L93 Difference]: Finished difference Result 113 states and 121 transitions. [2022-01-31 21:27:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 21:27:22,224 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-01-31 21:27:22,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:22,224 INFO L225 Difference]: With dead ends: 113 [2022-01-31 21:27:22,224 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 21:27:22,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=2642, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:27:22,225 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 79 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:22,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 150 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:27:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 21:27:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 21:27:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-01-31 21:27:22,229 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2022-01-31 21:27:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:22,229 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-01-31 21:27:22,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4444444444444446) internal successors, (93), 26 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-01-31 21:27:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-01-31 21:27:22,230 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:22,230 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:22,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:27:22,230 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:22,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:22,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1350262593, now seen corresponding path program 22 times [2022-01-31 21:27:22,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:22,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416631579] [2022-01-31 21:27:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:22,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:22,309 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:22,309 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:22,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:22,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:22,387 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:22,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:22,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:22,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:22,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416631579] [2022-01-31 21:27:22,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1416631579] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:22,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:22,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 21:27:22,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376806905] [2022-01-31 21:27:22,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:22,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 21:27:22,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 21:27:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2022-01-31 21:27:22,776 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:23,786 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2022-01-31 21:27:23,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 21:27:23,787 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-01-31 21:27:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:23,788 INFO L225 Difference]: With dead ends: 117 [2022-01-31 21:27:23,788 INFO L226 Difference]: Without dead ends: 108 [2022-01-31 21:27:23,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=2852, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:27:23,789 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 83 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 2405 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:23,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 156 Invalid, 2434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2405 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:27:23,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-01-31 21:27:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-01-31 21:27:23,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 103 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-01-31 21:27:23,793 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2022-01-31 21:27:23,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:23,793 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-01-31 21:27:23,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:23,793 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-01-31 21:27:23,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-01-31 21:27:23,793 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:23,793 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:23,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:27:23,794 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:23,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:23,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1182309656, now seen corresponding path program 23 times [2022-01-31 21:27:23,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:23,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1910403995] [2022-01-31 21:27:23,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:23,833 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,853 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:23,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:23,940 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:23,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:23,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:24,346 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:24,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1910403995] [2022-01-31 21:27:24,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1910403995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:24,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:24,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 21:27:24,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488306306] [2022-01-31 21:27:24,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:24,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 21:27:24,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 21:27:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2022-01-31 21:27:24,347 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:25,481 INFO L93 Difference]: Finished difference Result 121 states and 129 transitions. [2022-01-31 21:27:25,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 21:27:25,482 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-01-31 21:27:25,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:25,482 INFO L225 Difference]: With dead ends: 121 [2022-01-31 21:27:25,482 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 21:27:25,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=236, Invalid=3070, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:27:25,484 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 85 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2604 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:25,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 162 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2604 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:27:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 21:27:25,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-31 21:27:25,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-01-31 21:27:25,491 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2022-01-31 21:27:25,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:25,492 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-01-31 21:27:25,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4827586206896552) internal successors, (101), 28 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:25,492 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-01-31 21:27:25,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-01-31 21:27:25,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:25,492 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:25,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:27:25,493 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1566906223, now seen corresponding path program 24 times [2022-01-31 21:27:25,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:25,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957759465] [2022-01-31 21:27:25,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:25,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,576 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,593 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:25,628 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:25,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:25,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:25,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:25,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:26,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:26,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957759465] [2022-01-31 21:27:26,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1957759465] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:26,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:26,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 21:27:26,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414925781] [2022-01-31 21:27:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:26,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 21:27:26,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:26,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 21:27:26,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=956, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 21:27:26,051 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:27,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:27,228 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2022-01-31 21:27:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:27:27,228 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-01-31 21:27:27,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:27,229 INFO L225 Difference]: With dead ends: 125 [2022-01-31 21:27:27,229 INFO L226 Difference]: Without dead ends: 116 [2022-01-31 21:27:27,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=244, Invalid=3296, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:27:27,230 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 88 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2812 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:27,230 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 168 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2812 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:27:27,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-31 21:27:27,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-31 21:27:27,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 111 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:27,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-01-31 21:27:27,234 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 109 [2022-01-31 21:27:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:27,234 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-01-31 21:27:27,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.5) internal successors, (105), 29 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-01-31 21:27:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-01-31 21:27:27,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:27,237 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:27,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:27:27,237 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:27,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:27,237 INFO L85 PathProgramCache]: Analyzing trace with hash -632385978, now seen corresponding path program 25 times [2022-01-31 21:27:27,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:27,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239215391] [2022-01-31 21:27:27,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:27,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,299 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,299 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:27,320 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,369 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:27,370 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:27,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:27,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:27,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:27,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:27,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239215391] [2022-01-31 21:27:27,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239215391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:27,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:27,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 21:27:27,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545572168] [2022-01-31 21:27:27,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:27,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 21:27:27,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 21:27:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1019, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:27:27,808 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:29,050 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2022-01-31 21:27:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 21:27:29,051 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-01-31 21:27:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:29,051 INFO L225 Difference]: With dead ends: 129 [2022-01-31 21:27:29,051 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 21:27:29,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=3530, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:27:29,053 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 92 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:29,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 174 Invalid, 3061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:27:29,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 21:27:29,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-31 21:27:29,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-01-31 21:27:29,057 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2022-01-31 21:27:29,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:29,057 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-01-31 21:27:29,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.5161290322580645) internal successors, (109), 30 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:29,058 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-01-31 21:27:29,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-01-31 21:27:29,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:29,058 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:29,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:27:29,058 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:29,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:29,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1164099997, now seen corresponding path program 26 times [2022-01-31 21:27:29,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:29,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1301288936] [2022-01-31 21:27:29,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:29,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,127 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,127 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:29,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:29,183 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:29,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:29,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:29,660 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:29,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1301288936] [2022-01-31 21:27:29,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1301288936] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:29,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:29,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:27:29,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310792583] [2022-01-31 21:27:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:29,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:27:29,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:29,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:27:29,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1058, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 21:27:29,662 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:30,991 INFO L93 Difference]: Finished difference Result 133 states and 141 transitions. [2022-01-31 21:27:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:27:30,992 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-01-31 21:27:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:30,992 INFO L225 Difference]: With dead ends: 133 [2022-01-31 21:27:30,992 INFO L226 Difference]: Without dead ends: 124 [2022-01-31 21:27:30,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=312, Invalid=3720, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:27:30,994 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 94 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3252 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:30,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 180 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3252 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:27:30,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-31 21:27:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-01-31 21:27:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-01-31 21:27:30,998 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2022-01-31 21:27:30,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:30,998 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-01-31 21:27:30,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.53125) internal successors, (113), 31 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:30,998 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-01-31 21:27:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-01-31 21:27:30,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:30,998 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:30,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:27:30,999 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:30,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:30,999 INFO L85 PathProgramCache]: Analyzing trace with hash -638619276, now seen corresponding path program 27 times [2022-01-31 21:27:30,999 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:30,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566115730] [2022-01-31 21:27:30,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:31,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:31,065 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:31,065 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:31,088 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:31,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:31,151 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:31,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:31,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:31,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:31,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:31,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566115730] [2022-01-31 21:27:31,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [566115730] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:31,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:31,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:27:31,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618637694] [2022-01-31 21:27:31,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:31,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:27:31,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:31,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:27:31,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:27:31,649 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:33,092 INFO L93 Difference]: Finished difference Result 137 states and 145 transitions. [2022-01-31 21:27:33,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:27:33,092 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-01-31 21:27:33,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:33,093 INFO L225 Difference]: With dead ends: 137 [2022-01-31 21:27:33,093 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 21:27:33,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=268, Invalid=4022, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:27:33,095 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 98 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 3370 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:33,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 181 Invalid, 3404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3370 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:27:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 21:27:33,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-01-31 21:27:33,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.032520325203252) internal successors, (127), 123 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:33,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-01-31 21:27:33,099 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 121 [2022-01-31 21:27:33,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:33,099 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-01-31 21:27:33,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:33,099 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-01-31 21:27:33,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-31 21:27:33,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:33,100 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:33,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:27:33,100 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:33,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash -161325621, now seen corresponding path program 28 times [2022-01-31 21:27:33,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:33,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1220828794] [2022-01-31 21:27:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:33,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,154 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,155 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:33,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:33,225 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:33,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:33,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:33,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:33,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1220828794] [2022-01-31 21:27:33,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1220828794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:33,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:33,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:27:33,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102915406] [2022-01-31 21:27:33,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:33,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:27:33,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:33,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:27:33,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1220, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:27:33,717 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:35,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:35,178 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-01-31 21:27:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:27:35,179 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-01-31 21:27:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:35,180 INFO L225 Difference]: With dead ends: 141 [2022-01-31 21:27:35,180 INFO L226 Difference]: Without dead ends: 132 [2022-01-31 21:27:35,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=276, Invalid=4280, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:27:35,180 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 101 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 3604 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 3639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:35,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 187 Invalid, 3639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3604 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:27:35,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-31 21:27:35,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-01-31 21:27:35,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.031496062992126) internal successors, (131), 127 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:35,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-01-31 21:27:35,185 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2022-01-31 21:27:35,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:35,185 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-01-31 21:27:35,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 33 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:35,185 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-01-31 21:27:35,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-01-31 21:27:35,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:35,185 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:35,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:27:35,186 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:35,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:35,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1941354846, now seen corresponding path program 29 times [2022-01-31 21:27:35,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690926257] [2022-01-31 21:27:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:35,244 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,261 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,261 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:35,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,334 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:35,334 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:35,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:35,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:35,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:35,882 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:35,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690926257] [2022-01-31 21:27:35,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1690926257] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:35,883 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:35,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:27:35,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654108116] [2022-01-31 21:27:35,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:35,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:27:35,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:35,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:27:35,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1291, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:27:35,884 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:37,504 INFO L93 Difference]: Finished difference Result 145 states and 153 transitions. [2022-01-31 21:27:37,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:27:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-01-31 21:27:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:37,506 INFO L225 Difference]: With dead ends: 145 [2022-01-31 21:27:37,506 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 21:27:37,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=4546, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:27:37,507 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 103 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 4133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:37,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 203 Invalid, 4133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4097 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:27:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 21:27:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-01-31 21:27:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 131 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-01-31 21:27:37,511 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2022-01-31 21:27:37,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:37,511 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-01-31 21:27:37,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-01-31 21:27:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-01-31 21:27:37,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:37,512 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:37,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:27:37,512 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:37,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1873679367, now seen corresponding path program 30 times [2022-01-31 21:27:37,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:37,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532646476] [2022-01-31 21:27:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:37,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,565 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:37,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:37,645 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:37,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:37,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:37,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:37,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:37,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:38,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:38,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532646476] [2022-01-31 21:27:38,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532646476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:38,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:38,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:27:38,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311464786] [2022-01-31 21:27:38,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:38,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:27:38,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:38,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:27:38,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:27:38,213 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 36 states, 36 states have (on average 3.5833333333333335) internal successors, (129), 35 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:39,921 INFO L93 Difference]: Finished difference Result 149 states and 157 transitions. [2022-01-31 21:27:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:27:39,921 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5833333333333335) internal successors, (129), 35 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-01-31 21:27:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:39,922 INFO L225 Difference]: With dead ends: 149 [2022-01-31 21:27:39,922 INFO L226 Difference]: Without dead ends: 140 [2022-01-31 21:27:39,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=4820, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:27:39,922 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4228 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 4265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:39,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 204 Invalid, 4265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4228 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:27:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-01-31 21:27:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-01-31 21:27:39,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-01-31 21:27:39,927 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 133 [2022-01-31 21:27:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:39,927 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-01-31 21:27:39,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5833333333333335) internal successors, (129), 35 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:39,927 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-01-31 21:27:39,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-01-31 21:27:39,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:39,928 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:39,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:27:39,928 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:39,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1783238096, now seen corresponding path program 31 times [2022-01-31 21:27:39,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:39,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747084953] [2022-01-31 21:27:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:39,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:39,987 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:39,987 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:40,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:40,059 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:40,059 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:40,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:40,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:40,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:40,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:40,645 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:40,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747084953] [2022-01-31 21:27:40,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747084953] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:40,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:40,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:27:40,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405385139] [2022-01-31 21:27:40,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:40,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:27:40,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:40,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:27:40,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1439, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:27:40,647 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 36 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:42,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:42,449 INFO L93 Difference]: Finished difference Result 153 states and 161 transitions. [2022-01-31 21:27:42,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:27:42,449 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 36 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-01-31 21:27:42,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:42,450 INFO L225 Difference]: With dead ends: 153 [2022-01-31 21:27:42,450 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 21:27:42,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=5102, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:27:42,451 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 109 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4492 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 4530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:42,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 210 Invalid, 4530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4492 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:27:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 21:27:42,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-01-31 21:27:42,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:42,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-01-31 21:27:42,455 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 137 [2022-01-31 21:27:42,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:42,456 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-01-31 21:27:42,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5945945945945947) internal successors, (133), 36 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:42,456 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-01-31 21:27:42,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-01-31 21:27:42,456 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:42,456 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:42,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 21:27:42,456 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:42,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1696558119, now seen corresponding path program 32 times [2022-01-31 21:27:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:42,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7105998] [2022-01-31 21:27:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:42,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:42,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:42,528 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:42,553 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:42,602 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:42,602 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:42,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:42,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:42,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:43,209 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:43,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7105998] [2022-01-31 21:27:43,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [7105998] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:43,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:43,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:27:43,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877666459] [2022-01-31 21:27:43,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:43,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:27:43,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:27:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1516, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:27:43,217 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 37 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:45,087 INFO L93 Difference]: Finished difference Result 157 states and 165 transitions. [2022-01-31 21:27:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:27:45,087 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 37 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-01-31 21:27:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:45,088 INFO L225 Difference]: With dead ends: 157 [2022-01-31 21:27:45,088 INFO L226 Difference]: Without dead ends: 148 [2022-01-31 21:27:45,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=308, Invalid=5392, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:27:45,089 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 113 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4630 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 4669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:45,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 211 Invalid, 4669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4630 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:27:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-01-31 21:27:45,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-01-31 21:27:45,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.027972027972028) internal successors, (147), 143 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-01-31 21:27:45,093 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 141 [2022-01-31 21:27:45,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:45,094 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-01-31 21:27:45,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.6052631578947367) internal successors, (137), 37 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:45,094 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-01-31 21:27:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-01-31 21:27:45,094 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:45,094 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:45,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 21:27:45,095 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:45,095 INFO L85 PathProgramCache]: Analyzing trace with hash 517981950, now seen corresponding path program 33 times [2022-01-31 21:27:45,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:45,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283284491] [2022-01-31 21:27:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:45,155 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:45,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:45,181 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:45,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:45,245 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:45,245 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:45,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:45,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:45,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:45,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283284491] [2022-01-31 21:27:45,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283284491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:45,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:45,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:27:45,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102875166] [2022-01-31 21:27:45,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:45,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:27:45,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:27:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1595, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:27:45,887 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:47,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:47,887 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2022-01-31 21:27:47,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:27:47,888 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-01-31 21:27:47,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:47,888 INFO L225 Difference]: With dead ends: 161 [2022-01-31 21:27:47,888 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 21:27:47,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=316, Invalid=5690, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:27:47,889 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 115 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 5185 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 5225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:47,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 227 Invalid, 5225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5185 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:27:47,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 21:27:47,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-31 21:27:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0272108843537415) internal successors, (151), 147 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2022-01-31 21:27:47,894 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 145 [2022-01-31 21:27:47,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:47,894 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2022-01-31 21:27:47,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.6153846153846154) internal successors, (141), 38 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:47,894 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2022-01-31 21:27:47,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-01-31 21:27:47,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:47,895 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:47,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 21:27:47,895 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:47,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:47,895 INFO L85 PathProgramCache]: Analyzing trace with hash -122102187, now seen corresponding path program 34 times [2022-01-31 21:27:47,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:47,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [579940160] [2022-01-31 21:27:47,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:47,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:47,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:47,958 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:47,980 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:48,026 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:48,026 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:48,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:48,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:48,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:48,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:48,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [579940160] [2022-01-31 21:27:48,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [579940160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:48,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:48,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 21:27:48,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536469767] [2022-01-31 21:27:48,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:48,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:27:48,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:48,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:27:48,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1642, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:27:48,681 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand has 40 states, 40 states have (on average 3.625) internal successors, (145), 39 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:50,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:50,706 INFO L93 Difference]: Finished difference Result 165 states and 173 transitions. [2022-01-31 21:27:50,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:27:50,706 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.625) internal successors, (145), 39 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-01-31 21:27:50,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:50,707 INFO L225 Difference]: With dead ends: 165 [2022-01-31 21:27:50,707 INFO L226 Difference]: Without dead ends: 156 [2022-01-31 21:27:50,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=392, Invalid=5928, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:27:50,708 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 119 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 5188 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 5229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 5188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:50,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 223 Invalid, 5229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 5188 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:27:50,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-01-31 21:27:50,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-01-31 21:27:50,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0264900662251655) internal successors, (155), 151 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:50,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-01-31 21:27:50,712 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 149 [2022-01-31 21:27:50,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:50,713 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-01-31 21:27:50,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.625) internal successors, (145), 39 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-01-31 21:27:50,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-01-31 21:27:50,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:50,713 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:50,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 21:27:50,713 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:50,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:50,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2030538196, now seen corresponding path program 35 times [2022-01-31 21:27:50,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:50,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116475073] [2022-01-31 21:27:50,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:50,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:50,889 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:50,889 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:50,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:50,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:50,953 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:50,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:50,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:51,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116475073] [2022-01-31 21:27:51,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116475073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:51,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:51,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:27:51,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999979760] [2022-01-31 21:27:51,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:51,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:27:51,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:51,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:27:51,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1759, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:27:51,663 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:53,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:53,830 INFO L93 Difference]: Finished difference Result 169 states and 177 transitions. [2022-01-31 21:27:53,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:27:53,833 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-01-31 21:27:53,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:53,834 INFO L225 Difference]: With dead ends: 169 [2022-01-31 21:27:53,834 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 21:27:53,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1030 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=332, Invalid=6310, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:27:53,835 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 122 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 5480 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 5522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:53,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 229 Invalid, 5522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5480 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:27:53,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 21:27:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-31 21:27:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-01-31 21:27:53,840 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 153 [2022-01-31 21:27:53,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:53,840 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-01-31 21:27:53,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6341463414634148) internal successors, (149), 40 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:53,840 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-01-31 21:27:53,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-01-31 21:27:53,841 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:53,841 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:53,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 21:27:53,841 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash 17580675, now seen corresponding path program 36 times [2022-01-31 21:27:53,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:53,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922746873] [2022-01-31 21:27:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:53,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:53,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:53,904 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:53,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:53,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:53,955 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:53,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:54,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:54,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:54,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:54,698 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:54,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922746873] [2022-01-31 21:27:54,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [922746873] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:54,698 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:54,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 21:27:54,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259341687] [2022-01-31 21:27:54,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:54,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 21:27:54,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 21:27:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:27:54,699 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 41 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:56,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:27:56,990 INFO L93 Difference]: Finished difference Result 173 states and 181 transitions. [2022-01-31 21:27:56,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:27:56,990 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 41 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-01-31 21:27:56,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:27:56,991 INFO L225 Difference]: With dead ends: 173 [2022-01-31 21:27:56,991 INFO L226 Difference]: Without dead ends: 164 [2022-01-31 21:27:56,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1041 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=412, Invalid=6560, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:27:56,992 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 125 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 5782 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 5825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:27:56,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 235 Invalid, 5825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5782 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:27:56,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-01-31 21:27:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-01-31 21:27:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0251572327044025) internal successors, (163), 159 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2022-01-31 21:27:57,006 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 157 [2022-01-31 21:27:57,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:27:57,006 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2022-01-31 21:27:57,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.642857142857143) internal successors, (153), 41 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:27:57,006 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2022-01-31 21:27:57,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-01-31 21:27:57,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:27:57,007 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:27:57,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 21:27:57,007 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:27:57,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:27:57,007 INFO L85 PathProgramCache]: Analyzing trace with hash -1316876454, now seen corresponding path program 37 times [2022-01-31 21:27:57,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:27:57,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1001988682] [2022-01-31 21:27:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:27:57,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:57,091 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:57,091 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:57,116 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:57,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:27:57,158 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:27:57,158 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:27:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:57,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:27:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:27:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:27:57,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:27:57,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1001988682] [2022-01-31 21:27:57,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1001988682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:27:57,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:27:57,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:27:57,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267890282] [2022-01-31 21:27:57,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:27:57,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:27:57,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:27:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:27:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1931, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:27:57,908 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:00,269 INFO L93 Difference]: Finished difference Result 177 states and 185 transitions. [2022-01-31 21:28:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 21:28:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-01-31 21:28:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:00,274 INFO L225 Difference]: With dead ends: 177 [2022-01-31 21:28:00,275 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 21:28:00,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=348, Invalid=6962, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:28:00,276 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 128 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 6090 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 6134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 6090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:00,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 241 Invalid, 6134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 6090 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:28:00,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 21:28:00,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-01-31 21:28:00,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0245398773006136) internal successors, (167), 163 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:00,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2022-01-31 21:28:00,281 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 161 [2022-01-31 21:28:00,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:00,281 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2022-01-31 21:28:00,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.6511627906976742) internal successors, (157), 42 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:00,281 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2022-01-31 21:28:00,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-01-31 21:28:00,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:00,282 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:00,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 21:28:00,282 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:00,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:00,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1711773873, now seen corresponding path program 38 times [2022-01-31 21:28:00,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:00,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [945686220] [2022-01-31 21:28:00,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:00,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:00,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:00,356 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:00,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:00,415 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:00,415 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:00,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:00,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:00,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:00,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:01,203 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:01,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [945686220] [2022-01-31 21:28:01,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [945686220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:01,204 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:01,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:28:01,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416243649] [2022-01-31 21:28:01,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:01,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:28:01,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:01,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:28:01,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2020, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:28:01,205 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 43 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:03,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:03,833 INFO L93 Difference]: Finished difference Result 181 states and 189 transitions. [2022-01-31 21:28:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:28:03,833 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 43 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-01-31 21:28:03,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:03,834 INFO L225 Difference]: With dead ends: 181 [2022-01-31 21:28:03,834 INFO L226 Difference]: Without dead ends: 172 [2022-01-31 21:28:03,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=7300, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:28:03,835 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 130 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6725 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 6770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 6725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:03,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 257 Invalid, 6770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 6725 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:28:03,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-01-31 21:28:03,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-01-31 21:28:03,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0239520958083832) internal successors, (171), 167 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:03,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-01-31 21:28:03,840 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 165 [2022-01-31 21:28:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:03,840 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-01-31 21:28:03,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.659090909090909) internal successors, (161), 43 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-01-31 21:28:03,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-01-31 21:28:03,840 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:03,840 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:03,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 21:28:03,841 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:03,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:03,841 INFO L85 PathProgramCache]: Analyzing trace with hash -546660728, now seen corresponding path program 39 times [2022-01-31 21:28:03,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:03,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048475988] [2022-01-31 21:28:03,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:03,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:03,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:03,909 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:03,928 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:03,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:03,979 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:03,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:03,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:03,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:04,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:04,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048475988] [2022-01-31 21:28:04,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048475988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:04,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:04,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 21:28:04,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676283904] [2022-01-31 21:28:04,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:04,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 21:28:04,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:04,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 21:28:04,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=2111, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:28:04,773 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:07,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:07,504 INFO L93 Difference]: Finished difference Result 185 states and 193 transitions. [2022-01-31 21:28:07,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:28:07,505 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-01-31 21:28:07,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:07,505 INFO L225 Difference]: With dead ends: 185 [2022-01-31 21:28:07,506 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 21:28:07,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=364, Invalid=7646, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:28:07,506 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 133 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 6892 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 6938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:07,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 258 Invalid, 6938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6892 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:28:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 21:28:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-01-31 21:28:07,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.023391812865497) internal successors, (175), 171 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:07,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2022-01-31 21:28:07,511 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 169 [2022-01-31 21:28:07,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:07,512 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2022-01-31 21:28:07,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6666666666666665) internal successors, (165), 44 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:07,512 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2022-01-31 21:28:07,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-01-31 21:28:07,512 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:07,512 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:07,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 21:28:07,512 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:07,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:07,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1100538079, now seen corresponding path program 40 times [2022-01-31 21:28:07,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:07,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043885079] [2022-01-31 21:28:07,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:07,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:07,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:07,577 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:07,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:07,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:07,638 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:07,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:07,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:07,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:07,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:07,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:08,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043885079] [2022-01-31 21:28:08,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043885079] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:08,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:08,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 21:28:08,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926342403] [2022-01-31 21:28:08,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:08,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 21:28:08,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:08,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 21:28:08,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2204, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:28:08,473 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand has 46 states, 46 states have (on average 3.6739130434782608) internal successors, (169), 45 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:11,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:11,281 INFO L93 Difference]: Finished difference Result 189 states and 197 transitions. [2022-01-31 21:28:11,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 21:28:11,281 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.6739130434782608) internal successors, (169), 45 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-01-31 21:28:11,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:11,282 INFO L225 Difference]: With dead ends: 189 [2022-01-31 21:28:11,282 INFO L226 Difference]: Without dead ends: 180 [2022-01-31 21:28:11,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=372, Invalid=8000, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 21:28:11,283 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 137 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 7229 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 7276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 7229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:11,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 264 Invalid, 7276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 7229 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:28:11,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-01-31 21:28:11,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-01-31 21:28:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-01-31 21:28:11,289 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 173 [2022-01-31 21:28:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:11,289 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-01-31 21:28:11,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.6739130434782608) internal successors, (169), 45 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-01-31 21:28:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-01-31 21:28:11,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:11,290 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:11,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 21:28:11,290 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:11,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:11,290 INFO L85 PathProgramCache]: Analyzing trace with hash -2086658122, now seen corresponding path program 41 times [2022-01-31 21:28:11,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:11,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276008590] [2022-01-31 21:28:11,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:11,349 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:11,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:11,372 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:11,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:11,453 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:11,453 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:11,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:11,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:11,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:11,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:12,335 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:12,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276008590] [2022-01-31 21:28:12,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276008590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:12,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:12,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:28:12,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942703923] [2022-01-31 21:28:12,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:12,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:28:12,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:12,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:28:12,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=2299, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:28:12,336 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:15,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:15,272 INFO L93 Difference]: Finished difference Result 193 states and 201 transitions. [2022-01-31 21:28:15,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 21:28:15,273 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-01-31 21:28:15,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:15,274 INFO L225 Difference]: With dead ends: 193 [2022-01-31 21:28:15,274 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 21:28:15,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=380, Invalid=8362, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:28:15,275 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 139 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 7572 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 7620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 7572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:15,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 270 Invalid, 7620 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 7572 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:28:15,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 21:28:15,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-01-31 21:28:15,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0223463687150838) internal successors, (183), 179 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:15,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-01-31 21:28:15,280 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 177 [2022-01-31 21:28:15,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:15,281 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-01-31 21:28:15,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6808510638297873) internal successors, (173), 46 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:15,281 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-01-31 21:28:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-01-31 21:28:15,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:15,282 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:15,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 21:28:15,282 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:15,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -542237939, now seen corresponding path program 42 times [2022-01-31 21:28:15,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:15,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1662149623] [2022-01-31 21:28:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:15,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:15,343 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:15,343 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:15,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:15,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:15,406 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:15,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:15,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:15,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:16,284 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:16,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1662149623] [2022-01-31 21:28:16,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1662149623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:16,285 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:16,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 21:28:16,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708779762] [2022-01-31 21:28:16,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:16,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 21:28:16,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 21:28:16,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2354, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:28:16,286 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 48 states, 48 states have (on average 3.6875) internal successors, (177), 47 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:19,273 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2022-01-31 21:28:19,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:28:19,273 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 47 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-01-31 21:28:19,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:19,274 INFO L225 Difference]: With dead ends: 197 [2022-01-31 21:28:19,274 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:28:19,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1338 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=472, Invalid=8648, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 21:28:19,275 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 143 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 7925 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 7974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:19,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 276 Invalid, 7974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7925 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:28:19,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:28:19,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-01-31 21:28:19,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0218579234972678) internal successors, (187), 183 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 191 transitions. [2022-01-31 21:28:19,280 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 191 transitions. Word has length 181 [2022-01-31 21:28:19,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:19,280 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 191 transitions. [2022-01-31 21:28:19,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6875) internal successors, (177), 47 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:19,280 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 191 transitions. [2022-01-31 21:28:19,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-01-31 21:28:19,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:19,281 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:19,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 21:28:19,281 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:19,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1125159652, now seen corresponding path program 43 times [2022-01-31 21:28:19,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:19,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67352388] [2022-01-31 21:28:19,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:19,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,335 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,335 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:19,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,405 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:19,405 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:19,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:19,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:20,378 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67352388] [2022-01-31 21:28:20,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [67352388] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:20,378 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:20,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:28:20,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833216720] [2022-01-31 21:28:20,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:20,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:28:20,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:20,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:28:20,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2495, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:28:20,379 INFO L87 Difference]: Start difference. First operand 188 states and 191 transitions. Second operand has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 48 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:23,581 INFO L93 Difference]: Finished difference Result 201 states and 209 transitions. [2022-01-31 21:28:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 21:28:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 48 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-01-31 21:28:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:23,582 INFO L225 Difference]: With dead ends: 201 [2022-01-31 21:28:23,582 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 21:28:23,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1434 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=396, Invalid=9110, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:28:23,582 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 145 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 8465 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 8515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:23,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 287 Invalid, 8515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8465 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:28:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 21:28:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-31 21:28:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0213903743315509) internal successors, (191), 187 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2022-01-31 21:28:23,588 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 185 [2022-01-31 21:28:23,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:23,588 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2022-01-31 21:28:23,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.693877551020408) internal successors, (181), 48 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:23,588 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2022-01-31 21:28:23,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-01-31 21:28:23,588 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:23,589 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:23,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 21:28:23,589 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:23,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:23,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1103804613, now seen corresponding path program 44 times [2022-01-31 21:28:23,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:23,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023466316] [2022-01-31 21:28:23,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:23,637 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,660 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:23,676 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:23,735 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:23,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:23,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:23,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:24,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:24,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023466316] [2022-01-31 21:28:24,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023466316] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:24,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:24,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:28:24,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919735813] [2022-01-31 21:28:24,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:24,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:28:24,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:28:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2552, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:28:24,674 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand has 50 states, 50 states have (on average 3.7) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:27,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:27,875 INFO L93 Difference]: Finished difference Result 205 states and 213 transitions. [2022-01-31 21:28:27,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:28:27,876 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.7) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-01-31 21:28:27,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:27,876 INFO L225 Difference]: With dead ends: 205 [2022-01-31 21:28:27,876 INFO L226 Difference]: Without dead ends: 196 [2022-01-31 21:28:27,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1445 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=492, Invalid=9408, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:28:27,877 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 149 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 8468 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 8519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 8468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:27,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 283 Invalid, 8519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 8468 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:28:27,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-01-31 21:28:27,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-01-31 21:28:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0209424083769634) internal successors, (195), 191 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-01-31 21:28:27,883 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 189 [2022-01-31 21:28:27,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:27,883 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-01-31 21:28:27,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.7) internal successors, (185), 49 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:27,883 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-01-31 21:28:27,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-01-31 21:28:27,883 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:27,883 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:27,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 21:28:27,884 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -190187502, now seen corresponding path program 45 times [2022-01-31 21:28:27,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:27,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833334652] [2022-01-31 21:28:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:27,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:27,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:27,938 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:27,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:28,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:28,008 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:28,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:28,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:28,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:28,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:28,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833334652] [2022-01-31 21:28:28,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [833334652] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:28,992 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:28,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 21:28:28,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644978675] [2022-01-31 21:28:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:28,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 21:28:28,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:28,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 21:28:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=2699, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:28:28,993 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 51 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 50 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:32,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:32,404 INFO L93 Difference]: Finished difference Result 209 states and 217 transitions. [2022-01-31 21:28:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:28:32,405 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 50 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-01-31 21:28:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:32,405 INFO L225 Difference]: With dead ends: 209 [2022-01-31 21:28:32,405 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 21:28:32,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1545 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=412, Invalid=9890, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:28:32,406 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 152 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 9029 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 9081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 9029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:32,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 294 Invalid, 9081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 9029 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 21:28:32,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 21:28:32,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-01-31 21:28:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 195 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2022-01-31 21:28:32,411 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 193 [2022-01-31 21:28:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:32,411 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2022-01-31 21:28:32,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.7058823529411766) internal successors, (189), 50 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:32,412 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2022-01-31 21:28:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-01-31 21:28:32,412 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:32,412 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:32,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 21:28:32,412 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:32,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1927518871, now seen corresponding path program 46 times [2022-01-31 21:28:32,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:32,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180520375] [2022-01-31 21:28:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:32,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:32,483 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:32,483 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:32,506 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:32,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:32,573 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:32,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:32,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:32,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:33,688 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:33,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180520375] [2022-01-31 21:28:33,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [180520375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:33,689 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:33,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:28:33,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083109857] [2022-01-31 21:28:33,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:33,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:28:33,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:33,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:28:33,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3133, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:28:33,690 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand has 55 states, 54 states have (on average 3.574074074074074) internal successors, (193), 53 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:37,433 INFO L93 Difference]: Finished difference Result 213 states and 221 transitions. [2022-01-31 21:28:37,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:28:37,433 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.574074074074074) internal successors, (193), 53 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-01-31 21:28:37,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:37,439 INFO L225 Difference]: With dead ends: 213 [2022-01-31 21:28:37,439 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 21:28:37,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=427, Invalid=10915, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:28:37,440 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 154 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 10003 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 10057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 10003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:37,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 315 Invalid, 10057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 10003 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 21:28:37,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 21:28:37,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-01-31 21:28:37,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.020100502512563) internal successors, (203), 199 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:37,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-01-31 21:28:37,446 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 197 [2022-01-31 21:28:37,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:37,446 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-01-31 21:28:37,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.574074074074074) internal successors, (193), 53 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:37,446 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-01-31 21:28:37,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-01-31 21:28:37,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:37,447 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:37,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:28:37,447 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:37,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:37,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1587916992, now seen corresponding path program 47 times [2022-01-31 21:28:37,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:37,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779413764] [2022-01-31 21:28:37,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:37,487 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:37,504 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:37,505 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:37,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:37,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:37,569 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:37,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:37,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:37,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:38,614 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:38,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779413764] [2022-01-31 21:28:38,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779413764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:38,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:38,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:28:38,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090244957] [2022-01-31 21:28:38,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:38,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:28:38,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:38,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:28:38,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2911, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:28:38,616 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 53 states, 53 states have (on average 3.7169811320754715) internal successors, (197), 52 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:42,361 INFO L93 Difference]: Finished difference Result 217 states and 225 transitions. [2022-01-31 21:28:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 21:28:42,366 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.7169811320754715) internal successors, (197), 52 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-01-31 21:28:42,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:42,366 INFO L225 Difference]: With dead ends: 217 [2022-01-31 21:28:42,366 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 21:28:42,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=428, Invalid=10702, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:28:42,367 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 157 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 10001 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 10055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 10001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:42,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 311 Invalid, 10055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 10001 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 21:28:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 21:28:42,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-01-31 21:28:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.019704433497537) internal successors, (207), 203 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:42,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-01-31 21:28:42,375 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 201 [2022-01-31 21:28:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-01-31 21:28:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.7169811320754715) internal successors, (197), 52 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-01-31 21:28:42,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-01-31 21:28:42,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:42,376 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:42,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:28:42,376 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:42,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:42,376 INFO L85 PathProgramCache]: Analyzing trace with hash 777090455, now seen corresponding path program 48 times [2022-01-31 21:28:42,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:42,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16781651] [2022-01-31 21:28:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:42,415 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:42,433 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:42,434 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:42,450 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:42,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:42,498 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:42,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:42,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:43,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:43,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16781651] [2022-01-31 21:28:43,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [16781651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:43,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:43,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 21:28:43,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919141365] [2022-01-31 21:28:43,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:43,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 21:28:43,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:43,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 21:28:43,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=3020, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:28:43,589 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 54 states, 54 states have (on average 3.7222222222222223) internal successors, (201), 53 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:47,458 INFO L93 Difference]: Finished difference Result 221 states and 229 transitions. [2022-01-31 21:28:47,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:28:47,458 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.7222222222222223) internal successors, (201), 53 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-01-31 21:28:47,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:47,459 INFO L225 Difference]: With dead ends: 221 [2022-01-31 21:28:47,459 INFO L226 Difference]: Without dead ends: 212 [2022-01-31 21:28:47,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=436, Invalid=11120, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:28:47,460 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 160 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 10405 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 10460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 10405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:47,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 317 Invalid, 10460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 10405 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 21:28:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-31 21:28:47,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-01-31 21:28:47,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0193236714975846) internal successors, (211), 207 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:47,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2022-01-31 21:28:47,468 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 205 [2022-01-31 21:28:47,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:47,468 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2022-01-31 21:28:47,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.7222222222222223) internal successors, (201), 53 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:47,468 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2022-01-31 21:28:47,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-01-31 21:28:47,469 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:47,469 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:47,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:28:47,469 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:47,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:47,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2079352722, now seen corresponding path program 49 times [2022-01-31 21:28:47,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:47,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176459553] [2022-01-31 21:28:47,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:47,513 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:47,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:47,537 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:47,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:47,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:47,594 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:47,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:47,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:47,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:47,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:48,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:48,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176459553] [2022-01-31 21:28:48,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1176459553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:48,718 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:48,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:28:48,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215723653] [2022-01-31 21:28:48,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:48,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:28:48,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:48,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:28:48,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=3082, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:28:48,719 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand has 55 states, 55 states have (on average 3.727272727272727) internal successors, (205), 54 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:52,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:52,655 INFO L93 Difference]: Finished difference Result 225 states and 233 transitions. [2022-01-31 21:28:52,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 21:28:52,656 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.727272727272727) internal successors, (205), 54 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-01-31 21:28:52,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:52,656 INFO L225 Difference]: With dead ends: 225 [2022-01-31 21:28:52,656 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 21:28:52,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=542, Invalid=11448, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 21:28:52,657 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 164 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 10410 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 10466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 10410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:52,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 313 Invalid, 10466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 10410 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 21:28:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 21:28:52,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-01-31 21:28:52,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.018957345971564) internal successors, (215), 211 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:52,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-01-31 21:28:52,663 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 209 [2022-01-31 21:28:52,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:52,663 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-01-31 21:28:52,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.727272727272727) internal successors, (205), 54 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:52,663 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-01-31 21:28:52,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-01-31 21:28:52,664 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:52,664 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:52,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:28:52,664 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1245546555, now seen corresponding path program 50 times [2022-01-31 21:28:52,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:52,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527088900] [2022-01-31 21:28:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:52,712 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:52,730 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:52,730 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:52,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:52,787 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:52,787 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:52,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:52,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:52,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:53,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:53,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527088900] [2022-01-31 21:28:53,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [527088900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:53,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:53,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:28:53,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949489732] [2022-01-31 21:28:53,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:53,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:28:53,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:53,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:28:53,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3194, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:28:53,977 INFO L87 Difference]: Start difference. First operand 216 states and 219 transitions. Second operand has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:58,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:28:58,152 INFO L93 Difference]: Finished difference Result 229 states and 237 transitions. [2022-01-31 21:28:58,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:28:58,153 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-01-31 21:28:58,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:28:58,153 INFO L225 Difference]: With dead ends: 229 [2022-01-31 21:28:58,153 INFO L226 Difference]: Without dead ends: 220 [2022-01-31 21:28:58,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1790 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=552, Invalid=11880, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 21:28:58,155 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 166 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 11237 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 11294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 11237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:28:58,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 329 Invalid, 11294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 11237 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 21:28:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-01-31 21:28:58,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-01-31 21:28:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 215 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) [2022-01-31 21:28:58,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-01-31 21:28:58,161 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 213 [2022-01-31 21:28:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:28:58,162 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-01-31 21:28:58,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.732142857142857) internal successors, (209), 55 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:28:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-01-31 21:28:58,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-01-31 21:28:58,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:28:58,163 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:28:58,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:28:58,163 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:28:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:28:58,163 INFO L85 PathProgramCache]: Analyzing trace with hash 163042204, now seen corresponding path program 51 times [2022-01-31 21:28:58,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:28:58,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076441470] [2022-01-31 21:28:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:28:58,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:58,235 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:58,236 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:58,258 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:58,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:28:58,303 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:28:58,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:28:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:58,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:28:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:28:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:28:59,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:28:59,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076441470] [2022-01-31 21:28:59,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076441470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:28:59,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:28:59,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:28:59,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125912886] [2022-01-31 21:28:59,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:28:59,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:28:59,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:28:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:28:59,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=3359, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:28:59,499 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 56 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:03,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:03,811 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2022-01-31 21:29:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:29:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 56 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-01-31 21:29:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:03,812 INFO L225 Difference]: With dead ends: 233 [2022-01-31 21:29:03,812 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 21:29:03,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=460, Invalid=12422, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 21:29:03,813 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 170 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 11453 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 11511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 11453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:03,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 330 Invalid, 11511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 11453 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 21:29:03,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 21:29:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-01-31 21:29:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0182648401826484) internal successors, (223), 219 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:03,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 227 transitions. [2022-01-31 21:29:03,819 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 227 transitions. Word has length 217 [2022-01-31 21:29:03,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:03,820 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 227 transitions. [2022-01-31 21:29:03,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.736842105263158) internal successors, (213), 56 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:03,820 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 227 transitions. [2022-01-31 21:29:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-01-31 21:29:03,820 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:03,821 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:03,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:29:03,821 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:03,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1767730163, now seen corresponding path program 52 times [2022-01-31 21:29:03,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:03,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504969092] [2022-01-31 21:29:03,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:03,869 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:03,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:03,895 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:03,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:03,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:03,953 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:03,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:03,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:03,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:05,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:05,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504969092] [2022-01-31 21:29:05,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504969092] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:05,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:05,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 21:29:05,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442418482] [2022-01-31 21:29:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:05,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 21:29:05,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:05,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 21:29:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3476, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:29:05,182 INFO L87 Difference]: Start difference. First operand 224 states and 227 transitions. Second operand has 58 states, 58 states have (on average 3.7413793103448274) internal successors, (217), 57 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:09,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:09,569 INFO L93 Difference]: Finished difference Result 237 states and 245 transitions. [2022-01-31 21:29:09,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:29:09,569 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.7413793103448274) internal successors, (217), 57 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-01-31 21:29:09,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:09,570 INFO L225 Difference]: With dead ends: 237 [2022-01-31 21:29:09,570 INFO L226 Difference]: Without dead ends: 228 [2022-01-31 21:29:09,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1965 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=468, Invalid=12872, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 21:29:09,571 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 173 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 11668 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 11727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 11668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:09,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 331 Invalid, 11727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 11668 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 21:29:09,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-01-31 21:29:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-01-31 21:29:09,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 223 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2022-01-31 21:29:09,577 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 221 [2022-01-31 21:29:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:09,577 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2022-01-31 21:29:09,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.7413793103448274) internal successors, (217), 57 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2022-01-31 21:29:09,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-01-31 21:29:09,578 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:09,578 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:09,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:29:09,578 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:09,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:09,578 INFO L85 PathProgramCache]: Analyzing trace with hash -784269110, now seen corresponding path program 53 times [2022-01-31 21:29:09,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:09,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701393747] [2022-01-31 21:29:09,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:09,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:09,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:09,651 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:09,673 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:09,706 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:09,706 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:09,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:09,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:09,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:09,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:09,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:10,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:10,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701393747] [2022-01-31 21:29:10,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1701393747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:10,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:10,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:29:10,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406685723] [2022-01-31 21:29:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:10,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:29:10,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:29:10,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=3595, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:29:10,980 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 58 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:15,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:15,590 INFO L93 Difference]: Finished difference Result 241 states and 249 transitions. [2022-01-31 21:29:15,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 21:29:15,591 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 58 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 225 [2022-01-31 21:29:15,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:15,591 INFO L225 Difference]: With dead ends: 241 [2022-01-31 21:29:15,591 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 21:29:15,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2029 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=476, Invalid=13330, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 21:29:15,592 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 176 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 12325 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 12385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 12325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:15,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 342 Invalid, 12385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 12325 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 21:29:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 21:29:15,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-01-31 21:29:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0176211453744493) internal successors, (231), 227 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2022-01-31 21:29:15,602 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 225 [2022-01-31 21:29:15,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:15,602 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2022-01-31 21:29:15,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.7457627118644066) internal successors, (221), 58 states have internal predecessors, (221), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2022-01-31 21:29:15,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-01-31 21:29:15,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:15,603 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:15,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:29:15,603 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:15,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:15,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1055895007, now seen corresponding path program 54 times [2022-01-31 21:29:15,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:15,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075150617] [2022-01-31 21:29:15,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:15,640 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:15,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:15,657 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:15,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:15,713 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:15,713 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:15,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:15,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:15,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:17,047 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:17,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075150617] [2022-01-31 21:29:17,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075150617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:17,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:17,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 21:29:17,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303008676] [2022-01-31 21:29:17,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:17,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 21:29:17,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:17,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 21:29:17,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3716, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:29:17,049 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand has 60 states, 60 states have (on average 3.75) internal successors, (225), 59 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:21,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:21,743 INFO L93 Difference]: Finished difference Result 245 states and 253 transitions. [2022-01-31 21:29:21,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:29:21,743 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 59 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-01-31 21:29:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:21,744 INFO L225 Difference]: With dead ends: 245 [2022-01-31 21:29:21,744 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 21:29:21,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2094 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=484, Invalid=13796, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 21:29:21,745 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 179 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 12550 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 12611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 12550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:21,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 343 Invalid, 12611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 12550 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 21:29:21,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 21:29:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-01-31 21:29:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0173160173160174) internal successors, (235), 231 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:21,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 239 transitions. [2022-01-31 21:29:21,750 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 239 transitions. Word has length 229 [2022-01-31 21:29:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:21,751 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 239 transitions. [2022-01-31 21:29:21,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.75) internal successors, (225), 59 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 239 transitions. [2022-01-31 21:29:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-01-31 21:29:21,751 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:21,752 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:29:21,752 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1416028168, now seen corresponding path program 55 times [2022-01-31 21:29:21,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:21,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259339752] [2022-01-31 21:29:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:21,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:21,822 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:21,822 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:21,843 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:21,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:21,892 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:21,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:21,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:23,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:23,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259339752] [2022-01-31 21:29:23,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259339752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:23,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:23,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:29:23,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377626923] [2022-01-31 21:29:23,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:23,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:29:23,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:23,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:29:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=3784, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:29:23,302 INFO L87 Difference]: Start difference. First operand 236 states and 239 transitions. Second operand has 61 states, 61 states have (on average 3.7540983606557377) internal successors, (229), 60 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:28,210 INFO L93 Difference]: Finished difference Result 249 states and 257 transitions. [2022-01-31 21:29:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 21:29:28,210 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.7540983606557377) internal successors, (229), 60 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-01-31 21:29:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:28,211 INFO L225 Difference]: With dead ends: 249 [2022-01-31 21:29:28,211 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 21:29:28,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2105 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=602, Invalid=14160, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 21:29:28,212 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 181 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 13228 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 13290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 13228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:28,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 354 Invalid, 13290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 13228 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 21:29:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 21:29:28,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-01-31 21:29:28,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:28,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-01-31 21:29:28,218 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 233 [2022-01-31 21:29:28,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:28,218 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-01-31 21:29:28,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.7540983606557377) internal successors, (229), 60 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:28,218 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-01-31 21:29:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-01-31 21:29:28,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:28,219 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:28,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:29:28,219 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:28,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:28,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1724459599, now seen corresponding path program 56 times [2022-01-31 21:29:28,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:28,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652002469] [2022-01-31 21:29:28,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:28,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:28,288 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:28,288 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:28,307 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:28,344 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:28,344 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:28,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:28,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:29,741 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:29,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652002469] [2022-01-31 21:29:29,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1652002469] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:29,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:29,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:29:29,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115832223] [2022-01-31 21:29:29,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:29,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:29:29,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:29,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:29:29,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=3964, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:29:29,742 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 62 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 61 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:34,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:34,878 INFO L93 Difference]: Finished difference Result 253 states and 261 transitions. [2022-01-31 21:29:34,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:29:34,878 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 61 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 237 [2022-01-31 21:29:34,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:34,879 INFO L225 Difference]: With dead ends: 253 [2022-01-31 21:29:34,879 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 21:29:34,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 174 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=500, Invalid=14752, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 21:29:34,880 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 184 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 13925 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 13988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 13925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:34,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 365 Invalid, 13988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 13925 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 21:29:34,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 21:29:34,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-01-31 21:29:34,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.0167364016736402) internal successors, (243), 239 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:34,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 247 transitions. [2022-01-31 21:29:34,886 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 247 transitions. Word has length 237 [2022-01-31 21:29:34,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:34,887 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 247 transitions. [2022-01-31 21:29:34,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.7580645161290325) internal successors, (233), 61 states have internal predecessors, (233), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:34,887 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 247 transitions. [2022-01-31 21:29:34,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-01-31 21:29:34,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:34,888 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:34,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:29:34,888 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:34,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1683082970, now seen corresponding path program 57 times [2022-01-31 21:29:34,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:34,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45757644] [2022-01-31 21:29:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:34,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:34,960 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:34,960 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:34,977 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:35,025 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:35,025 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:35,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:35,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:35,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:35,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:36,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:36,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45757644] [2022-01-31 21:29:36,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [45757644] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:36,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:36,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:29:36,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566935999] [2022-01-31 21:29:36,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:36,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:29:36,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:36,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:29:36,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=4091, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:29:36,529 INFO L87 Difference]: Start difference. First operand 244 states and 247 transitions. Second operand has 63 states, 63 states have (on average 3.761904761904762) internal successors, (237), 62 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:41,793 INFO L93 Difference]: Finished difference Result 257 states and 265 transitions. [2022-01-31 21:29:41,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:29:41,793 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.761904761904762) internal successors, (237), 62 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-01-31 21:29:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:41,794 INFO L225 Difference]: With dead ends: 257 [2022-01-31 21:29:41,794 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 21:29:41,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2295 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=508, Invalid=15242, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 21:29:41,795 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 188 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 14165 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 14229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 14165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:41,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 366 Invalid, 14229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 14165 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-31 21:29:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 21:29:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-01-31 21:29:41,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.0164609053497942) internal successors, (247), 243 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 251 transitions. [2022-01-31 21:29:41,801 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 251 transitions. Word has length 241 [2022-01-31 21:29:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:41,801 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 251 transitions. [2022-01-31 21:29:41,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.761904761904762) internal successors, (237), 62 states have internal predecessors, (237), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:41,801 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 251 transitions. [2022-01-31 21:29:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-01-31 21:29:41,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:41,802 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:41,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:29:41,802 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:41,803 INFO L85 PathProgramCache]: Analyzing trace with hash 913699965, now seen corresponding path program 58 times [2022-01-31 21:29:41,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:41,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533684040] [2022-01-31 21:29:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:41,852 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:41,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:41,868 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:41,890 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:41,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:41,937 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:41,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:41,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:41,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:43,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:43,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533684040] [2022-01-31 21:29:43,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1533684040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:43,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:43,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 21:29:43,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371948683] [2022-01-31 21:29:43,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:43,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 21:29:43,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:43,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 21:29:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=4162, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:29:43,409 INFO L87 Difference]: Start difference. First operand 248 states and 251 transitions. Second operand has 64 states, 64 states have (on average 3.765625) internal successors, (241), 63 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:48,848 INFO L93 Difference]: Finished difference Result 261 states and 269 transitions. [2022-01-31 21:29:48,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:29:48,848 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.765625) internal successors, (241), 63 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-01-31 21:29:48,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:48,849 INFO L225 Difference]: With dead ends: 261 [2022-01-31 21:29:48,849 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 21:29:48,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2306 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=632, Invalid=15624, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 21:29:48,850 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 190 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 14644 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 14709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 14644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:48,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 372 Invalid, 14709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 14644 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 21:29:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 21:29:48,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2022-01-31 21:29:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.0161943319838056) internal successors, (251), 247 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 255 transitions. [2022-01-31 21:29:48,856 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 255 transitions. Word has length 245 [2022-01-31 21:29:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:48,857 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 255 transitions. [2022-01-31 21:29:48,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.765625) internal successors, (241), 63 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 255 transitions. [2022-01-31 21:29:48,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-01-31 21:29:48,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:48,858 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:48,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:29:48,858 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:48,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:48,858 INFO L85 PathProgramCache]: Analyzing trace with hash -697420716, now seen corresponding path program 59 times [2022-01-31 21:29:48,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:48,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753361746] [2022-01-31 21:29:48,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:48,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:48,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:48,916 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:48,939 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:48,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:48,973 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:48,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:49,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:50,534 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:50,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753361746] [2022-01-31 21:29:50,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753361746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:50,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:50,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:29:50,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869011931] [2022-01-31 21:29:50,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:50,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:29:50,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:50,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:29:50,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=4351, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:29:50,536 INFO L87 Difference]: Start difference. First operand 252 states and 255 transitions. Second operand has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 64 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:56,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:29:56,231 INFO L93 Difference]: Finished difference Result 265 states and 273 transitions. [2022-01-31 21:29:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 21:29:56,232 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 64 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-01-31 21:29:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:29:56,232 INFO L225 Difference]: With dead ends: 265 [2022-01-31 21:29:56,233 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 21:29:56,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=524, Invalid=16246, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 21:29:56,233 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 193 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 15132 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 15198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 15132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:29:56,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 378 Invalid, 15198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 15132 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-31 21:29:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 21:29:56,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-01-31 21:29:56,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0159362549800797) internal successors, (255), 251 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:56,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 259 transitions. [2022-01-31 21:29:56,240 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 259 transitions. Word has length 249 [2022-01-31 21:29:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:29:56,240 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 259 transitions. [2022-01-31 21:29:56,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.769230769230769) internal successors, (245), 64 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:29:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 259 transitions. [2022-01-31 21:29:56,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-01-31 21:29:56,241 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:29:56,241 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:29:56,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:29:56,241 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:29:56,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:29:56,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1040494763, now seen corresponding path program 60 times [2022-01-31 21:29:56,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:29:56,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115911752] [2022-01-31 21:29:56,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:29:56,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:56,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:56,303 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:56,326 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:56,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:29:56,372 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:29:56,372 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:29:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:29:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:29:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:29:57,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:29:57,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115911752] [2022-01-31 21:29:57,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [115911752] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:29:57,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:29:57,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 21:29:57,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332089779] [2022-01-31 21:29:57,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:29:57,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 21:29:57,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:29:57,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 21:29:57,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=4484, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:29:57,948 INFO L87 Difference]: Start difference. First operand 256 states and 259 transitions. Second operand has 66 states, 66 states have (on average 3.772727272727273) internal successors, (249), 65 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:03,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:03,833 INFO L93 Difference]: Finished difference Result 269 states and 277 transitions. [2022-01-31 21:30:03,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:30:03,834 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.772727272727273) internal successors, (249), 65 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-01-31 21:30:03,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:03,834 INFO L225 Difference]: With dead ends: 269 [2022-01-31 21:30:03,834 INFO L226 Difference]: Without dead ends: 260 [2022-01-31 21:30:03,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=532, Invalid=16760, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 21:30:03,835 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 197 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 15629 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 15696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 15629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:03,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 384 Invalid, 15696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 15629 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-01-31 21:30:03,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-01-31 21:30:03,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-01-31 21:30:03,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:03,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 263 transitions. [2022-01-31 21:30:03,842 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 263 transitions. Word has length 253 [2022-01-31 21:30:03,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:03,842 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 263 transitions. [2022-01-31 21:30:03,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.772727272727273) internal successors, (249), 65 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:03,842 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 263 transitions. [2022-01-31 21:30:03,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-01-31 21:30:03,843 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:03,843 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:03,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:30:03,843 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:03,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:03,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1027135102, now seen corresponding path program 61 times [2022-01-31 21:30:03,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:03,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244458947] [2022-01-31 21:30:03,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:03,883 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:03,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:03,908 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:03,926 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:03,973 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:03,974 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:03,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:04,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:04,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:05,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:05,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244458947] [2022-01-31 21:30:05,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244458947] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:05,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:05,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:30:05,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122729227] [2022-01-31 21:30:05,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:05,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:30:05,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:05,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:30:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=4619, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:30:05,631 INFO L87 Difference]: Start difference. First operand 260 states and 263 transitions. Second operand has 67 states, 67 states have (on average 3.7761194029850746) internal successors, (253), 66 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:11,779 INFO L93 Difference]: Finished difference Result 273 states and 281 transitions. [2022-01-31 21:30:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 21:30:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.7761194029850746) internal successors, (253), 66 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-01-31 21:30:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:11,781 INFO L225 Difference]: With dead ends: 273 [2022-01-31 21:30:11,781 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 21:30:11,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=540, Invalid=17282, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 21:30:11,782 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 200 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 16133 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 16201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 16133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:11,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 390 Invalid, 16201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 16133 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-01-31 21:30:11,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 21:30:11,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-01-31 21:30:11,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 259 states have (on average 1.0154440154440154) internal successors, (263), 259 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:11,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 267 transitions. [2022-01-31 21:30:11,800 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 267 transitions. Word has length 257 [2022-01-31 21:30:11,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:11,801 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 267 transitions. [2022-01-31 21:30:11,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.7761194029850746) internal successors, (253), 66 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:11,801 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 267 transitions. [2022-01-31 21:30:11,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-01-31 21:30:11,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:11,802 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:11,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:30:11,802 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:11,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1117561127, now seen corresponding path program 62 times [2022-01-31 21:30:11,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:11,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263648419] [2022-01-31 21:30:11,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:11,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:11,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:11,874 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:11,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:11,930 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:11,930 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:11,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:11,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:11,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:13,675 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:13,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263648419] [2022-01-31 21:30:13,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [263648419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:13,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:13,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:30:13,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157721265] [2022-01-31 21:30:13,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:13,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:30:13,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:13,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:30:13,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=4756, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:30:13,677 INFO L87 Difference]: Start difference. First operand 264 states and 267 transitions. Second operand has 68 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 67 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:19,923 INFO L93 Difference]: Finished difference Result 277 states and 285 transitions. [2022-01-31 21:30:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:30:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 67 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 261 [2022-01-31 21:30:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:19,925 INFO L225 Difference]: With dead ends: 277 [2022-01-31 21:30:19,925 INFO L226 Difference]: Without dead ends: 268 [2022-01-31 21:30:19,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2650 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=548, Invalid=17812, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 21:30:19,926 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 202 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 16901 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 16970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 16901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:19,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 401 Invalid, 16970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 16901 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-31 21:30:19,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-01-31 21:30:19,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-01-31 21:30:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.015209125475285) internal successors, (267), 263 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:19,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 271 transitions. [2022-01-31 21:30:19,940 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 271 transitions. Word has length 261 [2022-01-31 21:30:19,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:19,940 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 271 transitions. [2022-01-31 21:30:19,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.7794117647058822) internal successors, (257), 67 states have internal predecessors, (257), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:19,940 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 271 transitions. [2022-01-31 21:30:19,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-01-31 21:30:19,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:19,941 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:19,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:30:19,941 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:19,942 INFO L85 PathProgramCache]: Analyzing trace with hash -106491728, now seen corresponding path program 63 times [2022-01-31 21:30:19,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:19,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628570769] [2022-01-31 21:30:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:19,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:20,016 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:20,016 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:20,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:20,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:20,087 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:20,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:20,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:20,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:21,812 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:21,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628570769] [2022-01-31 21:30:21,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [628570769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:21,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:21,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:30:21,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70515866] [2022-01-31 21:30:21,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:21,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:30:21,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:21,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:30:21,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=4895, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:30:21,813 INFO L87 Difference]: Start difference. First operand 268 states and 271 transitions. Second operand has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 68 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:28,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:28,235 INFO L93 Difference]: Finished difference Result 281 states and 289 transitions. [2022-01-31 21:30:28,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:30:28,235 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 68 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-01-31 21:30:28,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:28,236 INFO L225 Difference]: With dead ends: 281 [2022-01-31 21:30:28,236 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 21:30:28,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2724 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=556, Invalid=18350, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 21:30:28,237 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 205 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 17164 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 17234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 17164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:28,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 402 Invalid, 17234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 17164 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-01-31 21:30:28,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 21:30:28,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-01-31 21:30:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.0149812734082397) internal successors, (271), 267 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:28,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 275 transitions. [2022-01-31 21:30:28,243 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 275 transitions. Word has length 265 [2022-01-31 21:30:28,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:28,244 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 275 transitions. [2022-01-31 21:30:28,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.782608695652174) internal successors, (261), 68 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:28,244 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 275 transitions. [2022-01-31 21:30:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-01-31 21:30:28,245 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:28,245 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:28,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:30:28,245 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:28,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:28,245 INFO L85 PathProgramCache]: Analyzing trace with hash 645922567, now seen corresponding path program 64 times [2022-01-31 21:30:28,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:28,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998587704] [2022-01-31 21:30:28,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:28,296 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:28,319 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:28,320 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:28,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:28,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:28,395 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:28,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:28,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:30,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:30,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998587704] [2022-01-31 21:30:30,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1998587704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:30,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:30,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 21:30:30,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328310961] [2022-01-31 21:30:30,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:30,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 21:30:30,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:30,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 21:30:30,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5036, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 21:30:30,178 INFO L87 Difference]: Start difference. First operand 272 states and 275 transitions. Second operand has 70 states, 70 states have (on average 3.7857142857142856) internal successors, (265), 69 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:36,753 INFO L93 Difference]: Finished difference Result 285 states and 293 transitions. [2022-01-31 21:30:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:30:36,753 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.7857142857142856) internal successors, (265), 69 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-01-31 21:30:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:36,754 INFO L225 Difference]: With dead ends: 285 [2022-01-31 21:30:36,754 INFO L226 Difference]: Without dead ends: 276 [2022-01-31 21:30:36,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2799 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=564, Invalid=18896, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 21:30:36,755 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 209 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 17430 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 17501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 17430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:36,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 403 Invalid, 17501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 17430 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-01-31 21:30:36,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-01-31 21:30:36,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-01-31 21:30:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:36,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 279 transitions. [2022-01-31 21:30:36,762 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 279 transitions. Word has length 269 [2022-01-31 21:30:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:36,762 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 279 transitions. [2022-01-31 21:30:36,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.7857142857142856) internal successors, (265), 69 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 279 transitions. [2022-01-31 21:30:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-01-31 21:30:36,763 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:36,763 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:36,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:30:36,764 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:36,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1174137310, now seen corresponding path program 65 times [2022-01-31 21:30:36,764 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856312391] [2022-01-31 21:30:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:36,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,841 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:36,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,913 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:36,913 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:36,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:36,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:36,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:38,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:38,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856312391] [2022-01-31 21:30:38,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [856312391] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:38,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:38,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:30:38,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639574787] [2022-01-31 21:30:38,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:38,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:30:38,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:38,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:30:38,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=5179, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:30:38,767 INFO L87 Difference]: Start difference. First operand 276 states and 279 transitions. Second operand has 71 states, 71 states have (on average 3.788732394366197) internal successors, (269), 70 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:45,483 INFO L93 Difference]: Finished difference Result 289 states and 297 transitions. [2022-01-31 21:30:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 21:30:45,483 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.788732394366197) internal successors, (269), 70 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 273 [2022-01-31 21:30:45,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:45,484 INFO L225 Difference]: With dead ends: 289 [2022-01-31 21:30:45,484 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 21:30:45,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2875 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=572, Invalid=19450, Unknown=0, NotChecked=0, Total=20022 [2022-01-31 21:30:45,485 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 212 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 17962 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 18034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 17962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:45,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 409 Invalid, 18034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 17962 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-01-31 21:30:45,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 21:30:45,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-01-31 21:30:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0145454545454546) internal successors, (279), 275 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2022-01-31 21:30:45,492 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 273 [2022-01-31 21:30:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:45,492 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2022-01-31 21:30:45,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.788732394366197) internal successors, (269), 70 states have internal predecessors, (269), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:45,492 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2022-01-31 21:30:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-01-31 21:30:45,493 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:45,493 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:45,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:30:45,493 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:45,494 INFO L85 PathProgramCache]: Analyzing trace with hash 491295029, now seen corresponding path program 66 times [2022-01-31 21:30:45,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:45,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [714538212] [2022-01-31 21:30:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:45,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:45,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:45,564 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:45,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:45,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:45,635 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:45,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:45,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:45,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:45,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:45,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:47,490 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:47,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [714538212] [2022-01-31 21:30:47,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [714538212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:47,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:47,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 21:30:47,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705340863] [2022-01-31 21:30:47,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:47,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 21:30:47,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 21:30:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=5324, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:30:47,491 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 72 states, 72 states have (on average 3.7916666666666665) internal successors, (273), 71 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:54,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:30:54,411 INFO L93 Difference]: Finished difference Result 293 states and 301 transitions. [2022-01-31 21:30:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:30:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.7916666666666665) internal successors, (273), 71 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-01-31 21:30:54,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:30:54,412 INFO L225 Difference]: With dead ends: 293 [2022-01-31 21:30:54,412 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:30:54,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2952 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=580, Invalid=20012, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 21:30:54,414 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 215 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 18500 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 18573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 18500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:30:54,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 415 Invalid, 18573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 18500 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-01-31 21:30:54,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:30:54,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-01-31 21:30:54,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.014336917562724) internal successors, (283), 279 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 287 transitions. [2022-01-31 21:30:54,421 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 287 transitions. Word has length 277 [2022-01-31 21:30:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:30:54,421 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 287 transitions. [2022-01-31 21:30:54,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.7916666666666665) internal successors, (273), 71 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:30:54,421 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 287 transitions. [2022-01-31 21:30:54,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-01-31 21:30:54,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:30:54,422 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:30:54,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:30:54,422 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:30:54,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:30:54,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1531726580, now seen corresponding path program 67 times [2022-01-31 21:30:54,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:30:54,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13298743] [2022-01-31 21:30:54,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:30:54,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:54,558 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:54,558 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:54,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:54,627 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:30:54,628 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:30:54,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:30:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:54,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:30:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:30:54,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:30:56,576 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:30:56,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13298743] [2022-01-31 21:30:56,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [13298743] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:30:56,577 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:30:56,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:30:56,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336220595] [2022-01-31 21:30:56,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:30:56,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:30:56,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:30:56,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:30:56,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=5471, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:30:56,578 INFO L87 Difference]: Start difference. First operand 284 states and 287 transitions. Second operand has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:03,686 INFO L93 Difference]: Finished difference Result 297 states and 305 transitions. [2022-01-31 21:31:03,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 21:31:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-01-31 21:31:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:03,688 INFO L225 Difference]: With dead ends: 297 [2022-01-31 21:31:03,688 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 21:31:03,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 208 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3030 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=588, Invalid=20582, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 21:31:03,689 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 218 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 19050 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 19124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 19050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:03,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 421 Invalid, 19124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 19050 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-01-31 21:31:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 21:31:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-01-31 21:31:03,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.0141342756183747) internal successors, (287), 283 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 291 transitions. [2022-01-31 21:31:03,695 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 291 transitions. Word has length 281 [2022-01-31 21:31:03,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:03,696 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 291 transitions. [2022-01-31 21:31:03,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.7945205479452055) internal successors, (277), 72 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 291 transitions. [2022-01-31 21:31:03,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-01-31 21:31:03,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:03,697 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:03,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:31:03,697 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:03,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:03,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2007700835, now seen corresponding path program 68 times [2022-01-31 21:31:03,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:03,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865267533] [2022-01-31 21:31:03,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:03,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:03,752 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:03,752 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:03,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:03,816 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:03,816 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:03,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:03,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:03,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:03,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:03,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:05,806 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:05,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865267533] [2022-01-31 21:31:05,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1865267533] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:05,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:05,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:31:05,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380072623] [2022-01-31 21:31:05,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:05,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:31:05,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:05,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:31:05,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=5552, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 21:31:05,807 INFO L87 Difference]: Start difference. First operand 288 states and 291 transitions. Second operand has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 73 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:13,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:13,263 INFO L93 Difference]: Finished difference Result 301 states and 309 transitions. [2022-01-31 21:31:13,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:31:13,264 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 73 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 285 [2022-01-31 21:31:13,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:13,265 INFO L225 Difference]: With dead ends: 301 [2022-01-31 21:31:13,265 INFO L226 Difference]: Without dead ends: 292 [2022-01-31 21:31:13,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=732, Invalid=21024, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 21:31:13,266 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 220 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 19884 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 19959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 19884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:13,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 432 Invalid, 19959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 19884 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-01-31 21:31:13,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-01-31 21:31:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2022-01-31 21:31:13,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0139372822299653) internal successors, (291), 287 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 295 transitions. [2022-01-31 21:31:13,283 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 295 transitions. Word has length 285 [2022-01-31 21:31:13,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:13,284 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 295 transitions. [2022-01-31 21:31:13,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.7972972972972974) internal successors, (281), 73 states have internal predecessors, (281), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 295 transitions. [2022-01-31 21:31:13,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-01-31 21:31:13,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:13,285 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:13,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:31:13,285 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:13,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:13,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1153200698, now seen corresponding path program 69 times [2022-01-31 21:31:13,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:13,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523589451] [2022-01-31 21:31:13,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:13,338 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,364 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:13,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:13,438 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:13,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:13,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:13,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:15,473 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:15,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523589451] [2022-01-31 21:31:15,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [523589451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:15,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:15,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:31:15,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577799051] [2022-01-31 21:31:15,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:15,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:31:15,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:15,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:31:15,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=5771, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:31:15,475 INFO L87 Difference]: Start difference. First operand 292 states and 295 transitions. Second operand has 75 states, 75 states have (on average 3.8) internal successors, (285), 74 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:23,240 INFO L93 Difference]: Finished difference Result 305 states and 313 transitions. [2022-01-31 21:31:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:31:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.8) internal successors, (285), 74 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-01-31 21:31:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:23,241 INFO L225 Difference]: With dead ends: 305 [2022-01-31 21:31:23,241 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 21:31:23,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3189 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=604, Invalid=21746, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 21:31:23,242 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 223 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 20737 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 20813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 20737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:23,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 443 Invalid, 20813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 20737 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-01-31 21:31:23,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 21:31:23,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-01-31 21:31:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.013745704467354) internal successors, (295), 291 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:23,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 299 transitions. [2022-01-31 21:31:23,249 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 299 transitions. Word has length 289 [2022-01-31 21:31:23,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:23,251 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 299 transitions. [2022-01-31 21:31:23,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.8) internal successors, (285), 74 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:23,251 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 299 transitions. [2022-01-31 21:31:23,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-01-31 21:31:23,252 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:23,252 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:23,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:31:23,252 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:23,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:23,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1033210769, now seen corresponding path program 70 times [2022-01-31 21:31:23,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:23,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1566136177] [2022-01-31 21:31:23,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:23,312 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:23,329 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:23,329 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:23,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:23,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:23,394 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:23,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:23,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:25,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:25,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1566136177] [2022-01-31 21:31:25,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1566136177] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:25,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:25,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:31:25,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985377634] [2022-01-31 21:31:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:25,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:31:25,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:25,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:31:25,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=5924, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:31:25,501 INFO L87 Difference]: Start difference. First operand 296 states and 299 transitions. Second operand has 76 states, 76 states have (on average 3.8026315789473686) internal successors, (289), 75 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:33,450 INFO L93 Difference]: Finished difference Result 309 states and 317 transitions. [2022-01-31 21:31:33,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 21:31:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.8026315789473686) internal successors, (289), 75 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-01-31 21:31:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:33,452 INFO L225 Difference]: With dead ends: 309 [2022-01-31 21:31:33,452 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 21:31:33,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3270 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=612, Invalid=22340, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 21:31:33,453 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 226 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 21028 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 21105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 21028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:33,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 444 Invalid, 21105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 21028 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-01-31 21:31:33,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 21:31:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-01-31 21:31:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2022-01-31 21:31:33,460 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 293 [2022-01-31 21:31:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:33,461 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2022-01-31 21:31:33,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.8026315789473686) internal successors, (289), 75 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2022-01-31 21:31:33,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-01-31 21:31:33,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:33,462 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:33,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:31:33,462 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:33,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2029772440, now seen corresponding path program 71 times [2022-01-31 21:31:33,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:33,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [693862277] [2022-01-31 21:31:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:33,498 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:33,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:33,515 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:33,538 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:33,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:33,573 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:33,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:35,713 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:35,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [693862277] [2022-01-31 21:31:35,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [693862277] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:35,713 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:35,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:31:35,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052722235] [2022-01-31 21:31:35,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:35,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:31:35,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:35,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:31:35,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=6079, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:31:35,714 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 76 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:43,838 INFO L93 Difference]: Finished difference Result 313 states and 321 transitions. [2022-01-31 21:31:43,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:31:43,838 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 76 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-01-31 21:31:43,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:43,839 INFO L225 Difference]: With dead ends: 313 [2022-01-31 21:31:43,839 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 21:31:43,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 219 SyntacticMatches, 1 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=620, Invalid=22942, Unknown=0, NotChecked=0, Total=23562 [2022-01-31 21:31:43,841 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 230 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 21320 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 21398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 21320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:43,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 445 Invalid, 21398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 21320 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-01-31 21:31:43,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 21:31:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-01-31 21:31:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 299 states have (on average 1.0133779264214047) internal successors, (303), 299 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 307 transitions. [2022-01-31 21:31:43,848 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 307 transitions. Word has length 297 [2022-01-31 21:31:43,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:43,848 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 307 transitions. [2022-01-31 21:31:43,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.8051948051948052) internal successors, (293), 76 states have internal predecessors, (293), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:43,848 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 307 transitions. [2022-01-31 21:31:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-01-31 21:31:43,849 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:43,849 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:43,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:31:43,850 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:43,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:43,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1460276289, now seen corresponding path program 72 times [2022-01-31 21:31:43,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:43,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475536010] [2022-01-31 21:31:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:43,887 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:43,911 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:43,911 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:43,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:43,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:43,969 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:43,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:43,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:44,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:46,132 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475536010] [2022-01-31 21:31:46,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [475536010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:46,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:46,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 21:31:46,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076104825] [2022-01-31 21:31:46,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:46,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 21:31:46,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 21:31:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=6236, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:31:46,133 INFO L87 Difference]: Start difference. First operand 304 states and 307 transitions. Second operand has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 77 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:31:54,401 INFO L93 Difference]: Finished difference Result 317 states and 325 transitions. [2022-01-31 21:31:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 21:31:54,401 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 77 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2022-01-31 21:31:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:31:54,402 INFO L225 Difference]: With dead ends: 317 [2022-01-31 21:31:54,402 INFO L226 Difference]: Without dead ends: 308 [2022-01-31 21:31:54,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3435 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=628, Invalid=23552, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 21:31:54,404 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 232 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 22204 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 22283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 22204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:31:54,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 456 Invalid, 22283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 22204 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-01-31 21:31:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-01-31 21:31:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-01-31 21:31:54,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.0132013201320131) internal successors, (307), 303 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:54,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 311 transitions. [2022-01-31 21:31:54,411 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 311 transitions. Word has length 301 [2022-01-31 21:31:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:31:54,412 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 311 transitions. [2022-01-31 21:31:54,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.8076923076923075) internal successors, (297), 77 states have internal predecessors, (297), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:31:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 311 transitions. [2022-01-31 21:31:54,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-01-31 21:31:54,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:31:54,413 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:31:54,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:31:54,413 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:31:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:31:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash -25640298, now seen corresponding path program 73 times [2022-01-31 21:31:54,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:31:54,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37159656] [2022-01-31 21:31:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:31:54,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:54,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:54,493 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:54,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:54,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:31:54,569 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:31:54,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:31:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:54,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:31:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:31:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:31:56,914 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:31:56,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37159656] [2022-01-31 21:31:56,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [37159656] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:31:56,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:31:56,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:31:56,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694155453] [2022-01-31 21:31:56,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:31:56,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:31:56,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:31:56,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:31:56,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=6886, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:31:56,915 INFO L87 Difference]: Start difference. First operand 308 states and 311 transitions. Second operand has 82 states, 81 states have (on average 3.7160493827160495) internal successors, (301), 80 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:05,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:05,733 INFO L93 Difference]: Finished difference Result 321 states and 329 transitions. [2022-01-31 21:32:05,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 21:32:05,733 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.7160493827160495) internal successors, (301), 80 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 305 [2022-01-31 21:32:05,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:05,734 INFO L225 Difference]: With dead ends: 321 [2022-01-31 21:32:05,734 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 21:32:05,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3528 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=643, Invalid=25117, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 21:32:05,735 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 235 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 23719 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 23800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 23719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:05,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 477 Invalid, 23800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 23719 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-01-31 21:32:05,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 21:32:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-01-31 21:32:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.013029315960912) internal successors, (311), 307 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:05,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 315 transitions. [2022-01-31 21:32:05,743 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 315 transitions. Word has length 305 [2022-01-31 21:32:05,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:05,743 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 315 transitions. [2022-01-31 21:32:05,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.7160493827160495) internal successors, (301), 80 states have internal predecessors, (301), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:05,743 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 315 transitions. [2022-01-31 21:32:05,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-01-31 21:32:05,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:05,744 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:05,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:32:05,744 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:05,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:05,744 INFO L85 PathProgramCache]: Analyzing trace with hash 632966637, now seen corresponding path program 74 times [2022-01-31 21:32:05,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:05,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238149254] [2022-01-31 21:32:05,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:05,796 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:05,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:05,824 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:05,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:05,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:05,921 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:05,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:05,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:05,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:05,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:08,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:08,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238149254] [2022-01-31 21:32:08,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [238149254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:08,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:08,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:32:08,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718555411] [2022-01-31 21:32:08,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:08,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:32:08,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:32:08,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=6556, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 21:32:08,164 INFO L87 Difference]: Start difference. First operand 312 states and 315 transitions. Second operand has 80 states, 80 states have (on average 3.8125) internal successors, (305), 79 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:16,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:16,923 INFO L93 Difference]: Finished difference Result 325 states and 333 transitions. [2022-01-31 21:32:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 21:32:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.8125) internal successors, (305), 79 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-01-31 21:32:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:16,924 INFO L225 Difference]: With dead ends: 325 [2022-01-31 21:32:16,924 INFO L226 Difference]: Without dead ends: 316 [2022-01-31 21:32:16,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 228 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3604 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=644, Invalid=24796, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 21:32:16,925 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 238 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 23412 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 23493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 23412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:16,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 468 Invalid, 23493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 23412 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-01-31 21:32:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-01-31 21:32:16,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 316. [2022-01-31 21:32:16,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 311 states have (on average 1.0128617363344052) internal successors, (315), 311 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:16,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 319 transitions. [2022-01-31 21:32:16,932 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 319 transitions. Word has length 309 [2022-01-31 21:32:16,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:16,932 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 319 transitions. [2022-01-31 21:32:16,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.8125) internal successors, (305), 79 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:16,933 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 319 transitions. [2022-01-31 21:32:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-01-31 21:32:16,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:16,934 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:16,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:32:16,934 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:16,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1879594436, now seen corresponding path program 75 times [2022-01-31 21:32:16,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:16,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577787870] [2022-01-31 21:32:16,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:16,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:17,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:17,004 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:17,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:17,061 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:17,061 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:17,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:17,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:17,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:17,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:19,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:19,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577787870] [2022-01-31 21:32:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [577787870] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:19,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:19,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 21:32:19,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552295000] [2022-01-31 21:32:19,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:19,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 21:32:19,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 21:32:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=6719, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:32:19,319 INFO L87 Difference]: Start difference. First operand 316 states and 319 transitions. Second operand has 81 states, 81 states have (on average 3.814814814814815) internal successors, (309), 80 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:28,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:28,221 INFO L93 Difference]: Finished difference Result 329 states and 337 transitions. [2022-01-31 21:32:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:32:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.814814814814815) internal successors, (309), 80 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-01-31 21:32:28,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:28,222 INFO L225 Difference]: With dead ends: 329 [2022-01-31 21:32:28,222 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 21:32:28,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3690 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=652, Invalid=25430, Unknown=0, NotChecked=0, Total=26082 [2022-01-31 21:32:28,224 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 241 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 24337 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 24419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 24337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:28,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 479 Invalid, 24419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 24337 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-01-31 21:32:28,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 21:32:28,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-01-31 21:32:28,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.0126984126984127) internal successors, (319), 315 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:28,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 323 transitions. [2022-01-31 21:32:28,231 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 323 transitions. Word has length 313 [2022-01-31 21:32:28,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:28,231 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 323 transitions. [2022-01-31 21:32:28,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.814814814814815) internal successors, (309), 80 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:28,231 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 323 transitions. [2022-01-31 21:32:28,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2022-01-31 21:32:28,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:28,232 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:28,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:32:28,232 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:28,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:28,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1372625435, now seen corresponding path program 76 times [2022-01-31 21:32:28,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:28,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55736364] [2022-01-31 21:32:28,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:28,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:28,302 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:28,302 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:28,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:28,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:28,363 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:28,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:28,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:30,665 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:30,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55736364] [2022-01-31 21:32:30,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [55736364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:30,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:30,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 21:32:30,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639659240] [2022-01-31 21:32:30,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:30,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 21:32:30,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 21:32:30,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=6884, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 21:32:30,667 INFO L87 Difference]: Start difference. First operand 320 states and 323 transitions. Second operand has 82 states, 82 states have (on average 3.817073170731707) internal successors, (313), 81 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:39,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:39,670 INFO L93 Difference]: Finished difference Result 333 states and 341 transitions. [2022-01-31 21:32:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 21:32:39,670 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.817073170731707) internal successors, (313), 81 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 317 [2022-01-31 21:32:39,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:39,671 INFO L225 Difference]: With dead ends: 333 [2022-01-31 21:32:39,671 INFO L226 Difference]: Without dead ends: 324 [2022-01-31 21:32:39,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3777 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=660, Invalid=26072, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 21:32:39,672 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 245 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 24653 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 24736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 24653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:39,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 480 Invalid, 24736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 24653 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-01-31 21:32:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-01-31 21:32:39,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2022-01-31 21:32:39,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.0125391849529781) internal successors, (323), 319 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:39,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 327 transitions. [2022-01-31 21:32:39,685 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 327 transitions. Word has length 317 [2022-01-31 21:32:39,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:39,685 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 327 transitions. [2022-01-31 21:32:39,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.817073170731707) internal successors, (313), 81 states have internal predecessors, (313), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:39,685 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 327 transitions. [2022-01-31 21:32:39,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-01-31 21:32:39,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:39,686 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:39,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:32:39,686 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:39,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:39,687 INFO L85 PathProgramCache]: Analyzing trace with hash -761210126, now seen corresponding path program 77 times [2022-01-31 21:32:39,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:39,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037984851] [2022-01-31 21:32:39,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:39,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:39,745 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:39,745 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:39,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:39,801 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:39,801 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:39,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:39,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:39,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:39,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:42,227 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:42,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037984851] [2022-01-31 21:32:42,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037984851] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:42,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:42,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 21:32:42,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359130826] [2022-01-31 21:32:42,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:42,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 21:32:42,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:42,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 21:32:42,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=6974, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:32:42,229 INFO L87 Difference]: Start difference. First operand 324 states and 327 transitions. Second operand has 83 states, 83 states have (on average 3.819277108433735) internal successors, (317), 82 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:51,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:32:51,547 INFO L93 Difference]: Finished difference Result 337 states and 345 transitions. [2022-01-31 21:32:51,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 21:32:51,548 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.819277108433735) internal successors, (317), 82 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 321 [2022-01-31 21:32:51,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:32:51,549 INFO L225 Difference]: With dead ends: 337 [2022-01-31 21:32:51,549 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 21:32:51,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3788 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=822, Invalid=26568, Unknown=0, NotChecked=0, Total=27390 [2022-01-31 21:32:51,550 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 247 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 25601 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 25685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 25601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:32:51,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 491 Invalid, 25685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 25601 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-01-31 21:32:51,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 21:32:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-01-31 21:32:51,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 1.0123839009287925) internal successors, (327), 323 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 331 transitions. [2022-01-31 21:32:51,563 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 331 transitions. Word has length 321 [2022-01-31 21:32:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:32:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 331 transitions. [2022-01-31 21:32:51,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.819277108433735) internal successors, (317), 82 states have internal predecessors, (317), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:32:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 331 transitions. [2022-01-31 21:32:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-01-31 21:32:51,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:32:51,564 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:32:51,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:32:51,565 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:32:51,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:32:51,565 INFO L85 PathProgramCache]: Analyzing trace with hash -47785911, now seen corresponding path program 78 times [2022-01-31 21:32:51,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:32:51,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213071040] [2022-01-31 21:32:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:32:51,601 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,624 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:51,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:32:51,694 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:32:51,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:32:51,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:32:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:32:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:32:54,133 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:32:54,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213071040] [2022-01-31 21:32:54,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [213071040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:32:54,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:32:54,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 21:32:54,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12350917] [2022-01-31 21:32:54,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:32:54,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 21:32:54,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:32:54,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 21:32:54,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=7142, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:32:54,134 INFO L87 Difference]: Start difference. First operand 328 states and 331 transitions. Second operand has 84 states, 84 states have (on average 3.8214285714285716) internal successors, (321), 83 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:03,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:03,562 INFO L93 Difference]: Finished difference Result 341 states and 349 transitions. [2022-01-31 21:33:03,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 21:33:03,563 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.8214285714285716) internal successors, (321), 83 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 325 [2022-01-31 21:33:03,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:03,564 INFO L225 Difference]: With dead ends: 341 [2022-01-31 21:33:03,564 INFO L226 Difference]: Without dead ends: 332 [2022-01-31 21:33:03,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 240 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3876 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=832, Invalid=27224, Unknown=0, NotChecked=0, Total=28056 [2022-01-31 21:33:03,565 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 250 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 25924 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 26009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 25924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:03,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 492 Invalid, 26009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 25924 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-01-31 21:33:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-01-31 21:33:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2022-01-31 21:33:03,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.0122324159021407) internal successors, (331), 327 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:03,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 335 transitions. [2022-01-31 21:33:03,573 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 335 transitions. Word has length 325 [2022-01-31 21:33:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:03,573 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 335 transitions. [2022-01-31 21:33:03,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.8214285714285716) internal successors, (321), 83 states have internal predecessors, (321), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:03,574 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 335 transitions. [2022-01-31 21:33:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-01-31 21:33:03,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:03,575 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:03,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:33:03,575 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:03,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:03,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1328566816, now seen corresponding path program 79 times [2022-01-31 21:33:03,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:03,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687827003] [2022-01-31 21:33:03,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:03,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:03,643 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:03,643 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:03,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:03,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:03,714 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:03,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:03,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:03,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:03,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:06,232 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:06,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687827003] [2022-01-31 21:33:06,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687827003] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:06,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:06,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 21:33:06,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108997112] [2022-01-31 21:33:06,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:06,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 21:33:06,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:06,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 21:33:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=7391, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:33:06,234 INFO L87 Difference]: Start difference. First operand 332 states and 335 transitions. Second operand has 85 states, 85 states have (on average 3.823529411764706) internal successors, (325), 84 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:15,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:15,865 INFO L93 Difference]: Finished difference Result 345 states and 353 transitions. [2022-01-31 21:33:15,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 21:33:15,865 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.823529411764706) internal successors, (325), 84 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 329 [2022-01-31 21:33:15,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:15,866 INFO L225 Difference]: With dead ends: 345 [2022-01-31 21:33:15,866 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 21:33:15,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=684, Invalid=28046, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 21:33:15,868 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 253 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 26572 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 26658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 26572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:15,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 498 Invalid, 26658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 26572 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-01-31 21:33:15,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 21:33:15,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-01-31 21:33:15,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 331 states have (on average 1.012084592145015) internal successors, (335), 331 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 339 transitions. [2022-01-31 21:33:15,875 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 339 transitions. Word has length 329 [2022-01-31 21:33:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:15,875 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 339 transitions. [2022-01-31 21:33:15,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.823529411764706) internal successors, (325), 84 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 339 transitions. [2022-01-31 21:33:15,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2022-01-31 21:33:15,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:15,877 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:15,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:33:15,878 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:15,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:15,878 INFO L85 PathProgramCache]: Analyzing trace with hash 699074679, now seen corresponding path program 80 times [2022-01-31 21:33:15,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:15,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63846224] [2022-01-31 21:33:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:15,924 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:15,942 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:15,942 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:15,963 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:15,998 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:15,999 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:15,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:16,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:16,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:18,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:18,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63846224] [2022-01-31 21:33:18,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [63846224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:18,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:18,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 21:33:18,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918428345] [2022-01-31 21:33:18,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:18,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 21:33:18,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:18,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 21:33:18,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=7564, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 21:33:18,567 INFO L87 Difference]: Start difference. First operand 336 states and 339 transitions. Second operand has 86 states, 86 states have (on average 3.8255813953488373) internal successors, (329), 85 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:28,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:28,572 INFO L93 Difference]: Finished difference Result 349 states and 357 transitions. [2022-01-31 21:33:28,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 21:33:28,572 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.8255813953488373) internal successors, (329), 85 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 333 [2022-01-31 21:33:28,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:28,573 INFO L225 Difference]: With dead ends: 349 [2022-01-31 21:33:28,573 INFO L226 Difference]: Without dead ends: 340 [2022-01-31 21:33:28,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4135 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=692, Invalid=28720, Unknown=0, NotChecked=0, Total=29412 [2022-01-31 21:33:28,574 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 257 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 26902 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 26989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 26902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:28,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 499 Invalid, 26989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 26902 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-01-31 21:33:28,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-01-31 21:33:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-01-31 21:33:28,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.0119402985074626) internal successors, (339), 335 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 343 transitions. [2022-01-31 21:33:28,582 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 343 transitions. Word has length 333 [2022-01-31 21:33:28,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:28,582 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 343 transitions. [2022-01-31 21:33:28,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.8255813953488373) internal successors, (329), 85 states have internal predecessors, (329), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:28,582 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 343 transitions. [2022-01-31 21:33:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-01-31 21:33:28,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:28,583 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:28,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:33:28,583 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:28,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:28,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1084537678, now seen corresponding path program 81 times [2022-01-31 21:33:28,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:28,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004073779] [2022-01-31 21:33:28,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:28,620 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:28,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:28,638 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:28,658 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:28,691 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:28,691 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:28,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:28,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:28,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:28,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:31,288 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:31,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004073779] [2022-01-31 21:33:31,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004073779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:31,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:31,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 21:33:31,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443720926] [2022-01-31 21:33:31,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:31,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 21:33:31,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:31,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 21:33:31,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=7739, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:33:31,290 INFO L87 Difference]: Start difference. First operand 340 states and 343 transitions. Second operand has 87 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 86 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:41,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:41,450 INFO L93 Difference]: Finished difference Result 353 states and 361 transitions. [2022-01-31 21:33:41,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 21:33:41,451 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 86 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 337 [2022-01-31 21:33:41,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:41,452 INFO L225 Difference]: With dead ends: 353 [2022-01-31 21:33:41,452 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 21:33:41,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4227 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=700, Invalid=29402, Unknown=0, NotChecked=0, Total=30102 [2022-01-31 21:33:41,453 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 259 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 27892 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 27980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 27892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:41,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 510 Invalid, 27980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 27892 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-01-31 21:33:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 21:33:41,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-01-31 21:33:41,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.0117994100294985) internal successors, (343), 339 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:41,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 347 transitions. [2022-01-31 21:33:41,461 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 347 transitions. Word has length 337 [2022-01-31 21:33:41,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:41,461 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 347 transitions. [2022-01-31 21:33:41,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.8275862068965516) internal successors, (333), 86 states have internal predecessors, (333), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:41,461 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 347 transitions. [2022-01-31 21:33:41,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2022-01-31 21:33:41,462 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:41,462 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:41,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:33:41,462 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:41,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:41,463 INFO L85 PathProgramCache]: Analyzing trace with hash 189475493, now seen corresponding path program 82 times [2022-01-31 21:33:41,463 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:41,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087143783] [2022-01-31 21:33:41,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:41,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:41,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:41,528 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:41,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:41,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:41,612 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:41,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:41,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:44,260 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:44,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087143783] [2022-01-31 21:33:44,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087143783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:44,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:44,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 21:33:44,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080940803] [2022-01-31 21:33:44,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:44,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 21:33:44,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:44,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 21:33:44,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=7916, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:33:44,262 INFO L87 Difference]: Start difference. First operand 344 states and 347 transitions. Second operand has 88 states, 88 states have (on average 3.8295454545454546) internal successors, (337), 87 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:54,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:33:54,523 INFO L93 Difference]: Finished difference Result 357 states and 365 transitions. [2022-01-31 21:33:54,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 21:33:54,523 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.8295454545454546) internal successors, (337), 87 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 341 [2022-01-31 21:33:54,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:33:54,524 INFO L225 Difference]: With dead ends: 357 [2022-01-31 21:33:54,524 INFO L226 Difference]: Without dead ends: 348 [2022-01-31 21:33:54,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 252 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4320 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=708, Invalid=30092, Unknown=0, NotChecked=0, Total=30800 [2022-01-31 21:33:54,525 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 263 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 28228 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 28317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 28228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:33:54,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 511 Invalid, 28317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 28228 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-01-31 21:33:54,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-01-31 21:33:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 348. [2022-01-31 21:33:54,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 343 states have (on average 1.0116618075801749) internal successors, (347), 343 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:54,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 351 transitions. [2022-01-31 21:33:54,533 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 351 transitions. Word has length 341 [2022-01-31 21:33:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:33:54,533 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 351 transitions. [2022-01-31 21:33:54,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.8295454545454546) internal successors, (337), 87 states have internal predecessors, (337), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:33:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 351 transitions. [2022-01-31 21:33:54,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-01-31 21:33:54,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:33:54,535 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:33:54,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:33:54,535 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:33:54,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:33:54,535 INFO L85 PathProgramCache]: Analyzing trace with hash 871110268, now seen corresponding path program 83 times [2022-01-31 21:33:54,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:33:54,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155541525] [2022-01-31 21:33:54,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:33:54,570 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:54,592 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:54,593 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:54,616 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:54,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:33:54,649 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:33:54,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:33:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:54,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:33:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:33:54,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:33:57,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:33:57,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155541525] [2022-01-31 21:33:57,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155541525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:33:57,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:33:57,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 21:33:57,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190588131] [2022-01-31 21:33:57,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:33:57,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 21:33:57,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:33:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 21:33:57,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=277, Invalid=8095, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 21:33:57,356 INFO L87 Difference]: Start difference. First operand 348 states and 351 transitions. Second operand has 89 states, 89 states have (on average 3.831460674157303) internal successors, (341), 88 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:08,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:08,129 INFO L93 Difference]: Finished difference Result 361 states and 369 transitions. [2022-01-31 21:34:08,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 21:34:08,129 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.831460674157303) internal successors, (341), 88 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 345 [2022-01-31 21:34:08,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:08,130 INFO L225 Difference]: With dead ends: 361 [2022-01-31 21:34:08,130 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 21:34:08,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4414 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=716, Invalid=30790, Unknown=0, NotChecked=0, Total=31506 [2022-01-31 21:34:08,132 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 265 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 29585 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 29675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 29585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:08,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 527 Invalid, 29675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 29585 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-01-31 21:34:08,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 21:34:08,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-31 21:34:08,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 347 states have (on average 1.0115273775216138) internal successors, (351), 347 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 355 transitions. [2022-01-31 21:34:08,140 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 355 transitions. Word has length 345 [2022-01-31 21:34:08,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:08,140 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 355 transitions. [2022-01-31 21:34:08,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.831460674157303) internal successors, (341), 88 states have internal predecessors, (341), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 355 transitions. [2022-01-31 21:34:08,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2022-01-31 21:34:08,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:08,141 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:08,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 21:34:08,141 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:08,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:08,141 INFO L85 PathProgramCache]: Analyzing trace with hash 133512915, now seen corresponding path program 84 times [2022-01-31 21:34:08,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:08,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138216252] [2022-01-31 21:34:08,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:08,178 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:08,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:08,194 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:08,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:08,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:08,258 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:08,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:08,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:08,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:08,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:34:11,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:34:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138216252] [2022-01-31 21:34:11,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138216252] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:34:11,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:34:11,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 21:34:11,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392877612] [2022-01-31 21:34:11,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:34:11,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 21:34:11,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:34:11,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 21:34:11,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=8276, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:34:11,017 INFO L87 Difference]: Start difference. First operand 352 states and 355 transitions. Second operand has 90 states, 90 states have (on average 3.8333333333333335) internal successors, (345), 89 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:21,991 INFO L93 Difference]: Finished difference Result 365 states and 373 transitions. [2022-01-31 21:34:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 21:34:21,991 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.8333333333333335) internal successors, (345), 89 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 349 [2022-01-31 21:34:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:21,992 INFO L225 Difference]: With dead ends: 365 [2022-01-31 21:34:21,992 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 21:34:21,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4509 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=724, Invalid=31496, Unknown=0, NotChecked=0, Total=32220 [2022-01-31 21:34:21,994 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 268 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 30277 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 30368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 30277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:21,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 533 Invalid, 30368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 30277 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-01-31 21:34:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 21:34:22,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 356. [2022-01-31 21:34:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 351 states have (on average 1.0113960113960114) internal successors, (355), 351 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:22,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 359 transitions. [2022-01-31 21:34:22,002 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 359 transitions. Word has length 349 [2022-01-31 21:34:22,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:22,002 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 359 transitions. [2022-01-31 21:34:22,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.8333333333333335) internal successors, (345), 89 states have internal predecessors, (345), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:22,002 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 359 transitions. [2022-01-31 21:34:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2022-01-31 21:34:22,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:22,003 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:22,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 21:34:22,003 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:22,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:22,004 INFO L85 PathProgramCache]: Analyzing trace with hash -403414102, now seen corresponding path program 85 times [2022-01-31 21:34:22,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:22,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939695183] [2022-01-31 21:34:22,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:22,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:22,058 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:22,059 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:22,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:22,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:22,131 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:22,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:22,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:22,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:34:24,940 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:34:24,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939695183] [2022-01-31 21:34:24,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939695183] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:34:24,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:34:24,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 21:34:24,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847837685] [2022-01-31 21:34:24,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:34:24,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 21:34:24,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:34:24,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 21:34:24,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=8459, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:34:24,947 INFO L87 Difference]: Start difference. First operand 356 states and 359 transitions. Second operand has 91 states, 91 states have (on average 3.8351648351648353) internal successors, (349), 90 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:36,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:36,014 INFO L93 Difference]: Finished difference Result 369 states and 377 transitions. [2022-01-31 21:34:36,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 21:34:36,014 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.8351648351648353) internal successors, (349), 90 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 353 [2022-01-31 21:34:36,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:36,015 INFO L225 Difference]: With dead ends: 369 [2022-01-31 21:34:36,015 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 21:34:36,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4605 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=732, Invalid=32210, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 21:34:36,016 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 271 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 30628 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 30720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 30628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:36,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 534 Invalid, 30720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 30628 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-01-31 21:34:36,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 21:34:36,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-31 21:34:36,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 355 states have (on average 1.0112676056338028) internal successors, (359), 355 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:36,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 363 transitions. [2022-01-31 21:34:36,024 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 363 transitions. Word has length 353 [2022-01-31 21:34:36,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:36,024 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 363 transitions. [2022-01-31 21:34:36,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.8351648351648353) internal successors, (349), 90 states have internal predecessors, (349), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:36,024 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 363 transitions. [2022-01-31 21:34:36,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2022-01-31 21:34:36,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:36,026 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:36,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 21:34:36,026 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:36,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1214823167, now seen corresponding path program 86 times [2022-01-31 21:34:36,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:36,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383916847] [2022-01-31 21:34:36,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:36,063 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:36,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:36,086 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:36,109 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:36,143 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:36,143 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:36,143 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:36,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:34:39,007 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:34:39,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383916847] [2022-01-31 21:34:39,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [383916847] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:34:39,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:34:39,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 21:34:39,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156893128] [2022-01-31 21:34:39,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:34:39,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 21:34:39,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:34:39,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 21:34:39,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=8644, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 21:34:39,009 INFO L87 Difference]: Start difference. First operand 360 states and 363 transitions. Second operand has 92 states, 92 states have (on average 3.8369565217391304) internal successors, (353), 91 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:50,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:34:50,337 INFO L93 Difference]: Finished difference Result 373 states and 381 transitions. [2022-01-31 21:34:50,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 21:34:50,337 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.8369565217391304) internal successors, (353), 91 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 357 [2022-01-31 21:34:50,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:34:50,338 INFO L225 Difference]: With dead ends: 373 [2022-01-31 21:34:50,338 INFO L226 Difference]: Without dead ends: 364 [2022-01-31 21:34:50,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4702 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=740, Invalid=32932, Unknown=0, NotChecked=0, Total=33672 [2022-01-31 21:34:50,340 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 274 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 31332 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 31425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 31332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:34:50,340 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 540 Invalid, 31425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 31332 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-01-31 21:34:50,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-01-31 21:34:50,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 364. [2022-01-31 21:34:50,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 359 states have (on average 1.011142061281337) internal successors, (363), 359 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:50,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 367 transitions. [2022-01-31 21:34:50,348 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 367 transitions. Word has length 357 [2022-01-31 21:34:50,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:34:50,348 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 367 transitions. [2022-01-31 21:34:50,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.8369565217391304) internal successors, (353), 91 states have internal predecessors, (353), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:34:50,348 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 367 transitions. [2022-01-31 21:34:50,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-01-31 21:34:50,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:34:50,349 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:34:50,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 21:34:50,350 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:34:50,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:34:50,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1303093976, now seen corresponding path program 87 times [2022-01-31 21:34:50,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:34:50,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226252957] [2022-01-31 21:34:50,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:34:50,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:50,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:50,419 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:50,435 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:50,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:34:50,482 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:34:50,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:34:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:50,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:34:50,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:34:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:34:53,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:34:53,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226252957] [2022-01-31 21:34:53,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226252957] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:34:53,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:34:53,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 21:34:53,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127833061] [2022-01-31 21:34:53,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:34:53,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 21:34:53,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:34:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 21:34:53,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=8831, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 21:34:53,448 INFO L87 Difference]: Start difference. First operand 364 states and 367 transitions. Second operand has 93 states, 93 states have (on average 3.838709677419355) internal successors, (357), 92 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:35:04,979 INFO L93 Difference]: Finished difference Result 377 states and 385 transitions. [2022-01-31 21:35:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 21:35:04,980 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 3.838709677419355) internal successors, (357), 92 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 361 [2022-01-31 21:35:04,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:35:04,981 INFO L225 Difference]: With dead ends: 377 [2022-01-31 21:35:04,981 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 21:35:04,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 268 SyntacticMatches, 1 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4800 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=748, Invalid=33662, Unknown=0, NotChecked=0, Total=34410 [2022-01-31 21:35:04,982 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 277 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 32044 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 32138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 32044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:35:04,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 546 Invalid, 32138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 32044 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-01-31 21:35:04,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 21:35:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-01-31 21:35:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 363 states have (on average 1.0110192837465564) internal successors, (367), 363 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 371 transitions. [2022-01-31 21:35:04,990 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 371 transitions. Word has length 361 [2022-01-31 21:35:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:35:04,990 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 371 transitions. [2022-01-31 21:35:04,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 3.838709677419355) internal successors, (357), 92 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 371 transitions. [2022-01-31 21:35:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-01-31 21:35:04,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:35:04,992 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:35:04,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 21:35:04,992 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:35:04,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:35:04,992 INFO L85 PathProgramCache]: Analyzing trace with hash -467714769, now seen corresponding path program 88 times [2022-01-31 21:35:04,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:35:04,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754689994] [2022-01-31 21:35:04,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:35:05,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:05,055 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:05,056 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:05,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:05,118 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:05,118 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:05,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:35:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:05,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:35:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:35:08,206 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:35:08,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754689994] [2022-01-31 21:35:08,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1754689994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:35:08,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:35:08,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 21:35:08,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947157421] [2022-01-31 21:35:08,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:35:08,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 21:35:08,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:35:08,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 21:35:08,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=9020, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 21:35:08,207 INFO L87 Difference]: Start difference. First operand 368 states and 371 transitions. Second operand has 94 states, 94 states have (on average 3.8404255319148937) internal successors, (361), 93 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:20,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:35:20,033 INFO L93 Difference]: Finished difference Result 381 states and 389 transitions. [2022-01-31 21:35:20,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 21:35:20,034 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.8404255319148937) internal successors, (361), 93 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 365 [2022-01-31 21:35:20,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:35:20,035 INFO L225 Difference]: With dead ends: 381 [2022-01-31 21:35:20,035 INFO L226 Difference]: Without dead ends: 372 [2022-01-31 21:35:20,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=756, Invalid=34400, Unknown=0, NotChecked=0, Total=35156 [2022-01-31 21:35:20,036 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 280 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 32764 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 32859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 32764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:35:20,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 552 Invalid, 32859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 32764 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-01-31 21:35:20,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-01-31 21:35:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2022-01-31 21:35:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 367 states have (on average 1.0108991825613078) internal successors, (371), 367 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 375 transitions. [2022-01-31 21:35:20,050 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 375 transitions. Word has length 365 [2022-01-31 21:35:20,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:35:20,051 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 375 transitions. [2022-01-31 21:35:20,051 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.8404255319148937) internal successors, (361), 93 states have internal predecessors, (361), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:20,051 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 375 transitions. [2022-01-31 21:35:20,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2022-01-31 21:35:20,052 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:35:20,052 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:35:20,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 21:35:20,052 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:35:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:35:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash -2013277178, now seen corresponding path program 89 times [2022-01-31 21:35:20,053 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:35:20,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874049923] [2022-01-31 21:35:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:35:20,103 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,121 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:20,138 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:20,185 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:20,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:35:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:20,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:35:20,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:20,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:35:23,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:35:23,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874049923] [2022-01-31 21:35:23,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874049923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:35:23,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:35:23,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 21:35:23,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291504150] [2022-01-31 21:35:23,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:35:23,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 21:35:23,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:35:23,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 21:35:23,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=9211, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:35:23,262 INFO L87 Difference]: Start difference. First operand 372 states and 375 transitions. Second operand has 95 states, 95 states have (on average 3.8421052631578947) internal successors, (365), 94 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:35,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:35:35,342 INFO L93 Difference]: Finished difference Result 385 states and 393 transitions. [2022-01-31 21:35:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 21:35:35,346 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 3.8421052631578947) internal successors, (365), 94 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 369 [2022-01-31 21:35:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:35:35,347 INFO L225 Difference]: With dead ends: 385 [2022-01-31 21:35:35,348 INFO L226 Difference]: Without dead ends: 376 [2022-01-31 21:35:35,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4999 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=764, Invalid=35146, Unknown=0, NotChecked=0, Total=35910 [2022-01-31 21:35:35,349 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 283 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 33492 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 33588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 33492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:35:35,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 558 Invalid, 33588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 33492 Invalid, 0 Unknown, 0 Unchecked, 8.8s Time] [2022-01-31 21:35:35,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-31 21:35:35,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-01-31 21:35:35,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.0107816711590296) internal successors, (375), 371 states have internal predecessors, (375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 379 transitions. [2022-01-31 21:35:35,357 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 379 transitions. Word has length 369 [2022-01-31 21:35:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:35:35,357 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 379 transitions. [2022-01-31 21:35:35,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 3.8421052631578947) internal successors, (365), 94 states have internal predecessors, (365), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 379 transitions. [2022-01-31 21:35:35,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-01-31 21:35:35,359 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:35:35,359 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:35:35,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 21:35:35,359 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:35:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:35:35,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1988417699, now seen corresponding path program 90 times [2022-01-31 21:35:35,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:35:35,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [254778794] [2022-01-31 21:35:35,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:35:35,407 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:35,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:35,425 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:35,448 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:35,495 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:35,496 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:35,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:35:35,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:35,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:35:35,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:35:38,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:35:38,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [254778794] [2022-01-31 21:35:38,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [254778794] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:35:38,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:35:38,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 21:35:38,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086505666] [2022-01-31 21:35:38,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:35:38,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 21:35:38,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:35:38,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 21:35:38,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=9404, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:35:38,616 INFO L87 Difference]: Start difference. First operand 376 states and 379 transitions. Second operand has 96 states, 96 states have (on average 3.84375) internal successors, (369), 95 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:50,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:35:50,971 INFO L93 Difference]: Finished difference Result 389 states and 397 transitions. [2022-01-31 21:35:50,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 21:35:50,972 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.84375) internal successors, (369), 95 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 373 [2022-01-31 21:35:50,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:35:50,973 INFO L225 Difference]: With dead ends: 389 [2022-01-31 21:35:50,973 INFO L226 Difference]: Without dead ends: 380 [2022-01-31 21:35:50,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 276 SyntacticMatches, 1 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5100 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=772, Invalid=35900, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 21:35:50,974 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 286 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 34228 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 34325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 34228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:35:50,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 564 Invalid, 34325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 34228 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2022-01-31 21:35:50,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-01-31 21:35:50,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-01-31 21:35:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.0106666666666666) internal successors, (379), 375 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 383 transitions. [2022-01-31 21:35:50,982 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 383 transitions. Word has length 373 [2022-01-31 21:35:50,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:35:50,982 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 383 transitions. [2022-01-31 21:35:50,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.84375) internal successors, (369), 95 states have internal predecessors, (369), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:35:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 383 transitions. [2022-01-31 21:35:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-01-31 21:35:50,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:35:50,984 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:35:50,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 21:35:50,984 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:35:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:35:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash -337709260, now seen corresponding path program 91 times [2022-01-31 21:35:50,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:35:50,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1021083266] [2022-01-31 21:35:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:35:51,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:51,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:51,042 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:51,067 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:51,102 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:35:51,102 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:35:51,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:35:51,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:51,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:35:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:35:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:35:54,270 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:35:54,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1021083266] [2022-01-31 21:35:54,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1021083266] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:35:54,271 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:35:54,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 21:35:54,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627384349] [2022-01-31 21:35:54,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:35:54,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 21:35:54,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:35:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 21:35:54,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=9599, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:35:54,272 INFO L87 Difference]: Start difference. First operand 380 states and 383 transitions. Second operand has 97 states, 97 states have (on average 3.845360824742268) internal successors, (373), 96 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:06,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:36:06,817 INFO L93 Difference]: Finished difference Result 393 states and 401 transitions. [2022-01-31 21:36:06,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 21:36:06,817 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 3.845360824742268) internal successors, (373), 96 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 377 [2022-01-31 21:36:06,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:36:06,818 INFO L225 Difference]: With dead ends: 393 [2022-01-31 21:36:06,818 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 21:36:06,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5202 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=780, Invalid=36662, Unknown=0, NotChecked=0, Total=37442 [2022-01-31 21:36:06,819 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 289 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 34972 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 570 SdHoareTripleChecker+Invalid, 35070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 34972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:36:06,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 570 Invalid, 35070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 34972 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-01-31 21:36:06,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 21:36:06,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-01-31 21:36:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 379 states have (on average 1.0105540897097625) internal successors, (383), 379 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 387 transitions. [2022-01-31 21:36:06,827 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 387 transitions. Word has length 377 [2022-01-31 21:36:06,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:36:06,828 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 387 transitions. [2022-01-31 21:36:06,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 3.845360824742268) internal successors, (373), 96 states have internal predecessors, (373), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 387 transitions. [2022-01-31 21:36:06,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-01-31 21:36:06,829 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:36:06,829 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:36:06,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 21:36:06,829 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:36:06,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:36:06,829 INFO L85 PathProgramCache]: Analyzing trace with hash -711392373, now seen corresponding path program 92 times [2022-01-31 21:36:06,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:36:06,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902964313] [2022-01-31 21:36:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:36:06,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:06,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:06,903 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:06,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:06,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:06,970 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:06,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:36:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:06,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:36:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:36:10,186 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:36:10,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902964313] [2022-01-31 21:36:10,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1902964313] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:36:10,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:36:10,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 21:36:10,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141903941] [2022-01-31 21:36:10,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:36:10,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 21:36:10,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:36:10,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 21:36:10,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=9704, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 21:36:10,188 INFO L87 Difference]: Start difference. First operand 384 states and 387 transitions. Second operand has 98 states, 98 states have (on average 3.8469387755102042) internal successors, (377), 97 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:22,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:36:22,877 INFO L93 Difference]: Finished difference Result 397 states and 405 transitions. [2022-01-31 21:36:22,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 21:36:22,878 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.8469387755102042) internal successors, (377), 97 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 381 [2022-01-31 21:36:22,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:36:22,879 INFO L225 Difference]: With dead ends: 397 [2022-01-31 21:36:22,879 INFO L226 Difference]: Without dead ends: 388 [2022-01-31 21:36:22,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 282 SyntacticMatches, 1 SemanticMatches, 194 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5213 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=972, Invalid=37248, Unknown=0, NotChecked=0, Total=38220 [2022-01-31 21:36:22,881 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 293 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 35348 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 35447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 35348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:36:22,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 571 Invalid, 35447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 35348 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-01-31 21:36:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-01-31 21:36:22,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-01-31 21:36:22,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.010443864229765) internal successors, (387), 383 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:22,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 391 transitions. [2022-01-31 21:36:22,895 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 391 transitions. Word has length 381 [2022-01-31 21:36:22,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:36:22,896 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 391 transitions. [2022-01-31 21:36:22,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.8469387755102042) internal successors, (377), 97 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:22,896 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 391 transitions. [2022-01-31 21:36:22,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2022-01-31 21:36:22,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:36:22,897 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:36:22,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 21:36:22,897 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:36:22,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:36:22,897 INFO L85 PathProgramCache]: Analyzing trace with hash 3607650, now seen corresponding path program 93 times [2022-01-31 21:36:22,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:36:22,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398024300] [2022-01-31 21:36:22,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:36:22,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:22,949 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:22,949 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:22,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:23,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:23,000 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:23,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:36:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:23,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:36:23,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:36:26,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:36:26,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398024300] [2022-01-31 21:36:26,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398024300] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:36:26,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:36:26,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 21:36:26,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646741156] [2022-01-31 21:36:26,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:36:26,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 21:36:26,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:36:26,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 21:36:26,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=9995, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:36:26,314 INFO L87 Difference]: Start difference. First operand 388 states and 391 transitions. Second operand has 99 states, 99 states have (on average 3.8484848484848486) internal successors, (381), 98 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:36:39,311 INFO L93 Difference]: Finished difference Result 401 states and 409 transitions. [2022-01-31 21:36:39,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 21:36:39,312 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 3.8484848484848486) internal successors, (381), 98 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 385 [2022-01-31 21:36:39,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:36:39,313 INFO L225 Difference]: With dead ends: 401 [2022-01-31 21:36:39,313 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 21:36:39,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5409 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=796, Invalid=38210, Unknown=0, NotChecked=0, Total=39006 [2022-01-31 21:36:39,314 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 296 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 36106 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 36206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 36106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:36:39,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 577 Invalid, 36206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 36106 Invalid, 0 Unknown, 0 Unchecked, 9.5s Time] [2022-01-31 21:36:39,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 21:36:39,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-01-31 21:36:39,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 387 states have (on average 1.0103359173126616) internal successors, (391), 387 states have internal predecessors, (391), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 395 transitions. [2022-01-31 21:36:39,323 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 395 transitions. Word has length 385 [2022-01-31 21:36:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:36:39,323 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 395 transitions. [2022-01-31 21:36:39,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 3.8484848484848486) internal successors, (381), 98 states have internal predecessors, (381), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 395 transitions. [2022-01-31 21:36:39,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-01-31 21:36:39,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:36:39,324 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:36:39,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 21:36:39,324 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:36:39,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:36:39,325 INFO L85 PathProgramCache]: Analyzing trace with hash 677827001, now seen corresponding path program 94 times [2022-01-31 21:36:39,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:36:39,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977878881] [2022-01-31 21:36:39,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:36:39,360 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:39,377 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:39,377 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:39,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:39,441 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:39,441 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:39,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:36:39,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:39,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:36:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:39,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:36:42,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:36:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977878881] [2022-01-31 21:36:42,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977878881] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:36:42,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:36:42,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 21:36:42,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99031728] [2022-01-31 21:36:42,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:36:42,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 21:36:42,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:36:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 21:36:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=10196, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:36:42,802 INFO L87 Difference]: Start difference. First operand 392 states and 395 transitions. Second operand has 100 states, 100 states have (on average 3.85) internal successors, (385), 99 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:56,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:36:56,279 INFO L93 Difference]: Finished difference Result 405 states and 413 transitions. [2022-01-31 21:36:56,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 21:36:56,280 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.85) internal successors, (385), 99 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 389 [2022-01-31 21:36:56,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:36:56,281 INFO L225 Difference]: With dead ends: 405 [2022-01-31 21:36:56,281 INFO L226 Difference]: Without dead ends: 396 [2022-01-31 21:36:56,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5514 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=804, Invalid=38996, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 21:36:56,282 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 298 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 37637 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 37738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 37637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:36:56,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 593 Invalid, 37738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 37637 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-01-31 21:36:56,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-31 21:36:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 396. [2022-01-31 21:36:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 391 states have (on average 1.010230179028133) internal successors, (395), 391 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 399 transitions. [2022-01-31 21:36:56,291 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 399 transitions. Word has length 389 [2022-01-31 21:36:56,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:36:56,291 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 399 transitions. [2022-01-31 21:36:56,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.85) internal successors, (385), 99 states have internal predecessors, (385), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:36:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 399 transitions. [2022-01-31 21:36:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-01-31 21:36:56,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:36:56,293 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:36:56,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 21:36:56,293 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:36:56,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:36:56,294 INFO L85 PathProgramCache]: Analyzing trace with hash 2113278864, now seen corresponding path program 95 times [2022-01-31 21:36:56,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:36:56,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637845248] [2022-01-31 21:36:56,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:36:56,341 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:56,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:56,358 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:56,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:56,431 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:36:56,431 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:36:56,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:36:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:56,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:36:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:36:56,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:36:59,824 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:36:59,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637845248] [2022-01-31 21:36:59,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637845248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:36:59,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:36:59,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 21:36:59,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483156127] [2022-01-31 21:36:59,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:36:59,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 21:36:59,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:36:59,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 21:36:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=10399, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 21:36:59,826 INFO L87 Difference]: Start difference. First operand 396 states and 399 transitions. Second operand has 101 states, 101 states have (on average 3.8514851485148514) internal successors, (389), 100 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:37:13,305 INFO L93 Difference]: Finished difference Result 409 states and 417 transitions. [2022-01-31 21:37:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 21:37:13,305 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.8514851485148514) internal successors, (389), 100 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 393 [2022-01-31 21:37:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:37:13,306 INFO L225 Difference]: With dead ends: 409 [2022-01-31 21:37:13,306 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 21:37:13,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 292 SyntacticMatches, 1 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5620 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=812, Invalid=39790, Unknown=0, NotChecked=0, Total=40602 [2022-01-31 21:37:13,308 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 302 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 37640 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 37742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 37640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:37:13,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 589 Invalid, 37742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 37640 Invalid, 0 Unknown, 0 Unchecked, 9.9s Time] [2022-01-31 21:37:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 21:37:13,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-01-31 21:37:13,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 395 states have (on average 1.010126582278481) internal successors, (399), 395 states have internal predecessors, (399), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 403 transitions. [2022-01-31 21:37:13,323 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 403 transitions. Word has length 393 [2022-01-31 21:37:13,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:37:13,324 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 403 transitions. [2022-01-31 21:37:13,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.8514851485148514) internal successors, (389), 100 states have internal predecessors, (389), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:13,324 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 403 transitions. [2022-01-31 21:37:13,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 398 [2022-01-31 21:37:13,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:37:13,325 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:37:13,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 21:37:13,325 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:37:13,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:37:13,326 INFO L85 PathProgramCache]: Analyzing trace with hash 332567015, now seen corresponding path program 96 times [2022-01-31 21:37:13,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:37:13,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [613289492] [2022-01-31 21:37:13,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:37:13,364 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:13,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:13,388 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:13,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:13,461 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:13,461 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:13,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:37:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:13,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:37:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:37:17,143 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:37:17,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [613289492] [2022-01-31 21:37:17,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [613289492] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:37:17,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:37:17,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 21:37:17,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646870750] [2022-01-31 21:37:17,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:37:17,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 21:37:17,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:37:17,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 21:37:17,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=11233, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:37:17,144 INFO L87 Difference]: Start difference. First operand 400 states and 403 transitions. Second operand has 105 states, 104 states have (on average 3.7788461538461537) internal successors, (393), 103 states have internal predecessors, (393), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:31,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:37:31,489 INFO L93 Difference]: Finished difference Result 413 states and 421 transitions. [2022-01-31 21:37:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 21:37:31,490 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 3.7788461538461537) internal successors, (393), 103 states have internal predecessors, (393), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 397 [2022-01-31 21:37:31,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:37:31,491 INFO L225 Difference]: With dead ends: 413 [2022-01-31 21:37:31,491 INFO L226 Difference]: Without dead ends: 404 [2022-01-31 21:37:31,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 291 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5736 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=827, Invalid=41815, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 21:37:31,493 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 305 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 39613 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 39717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 39613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:37:31,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 610 Invalid, 39717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 39613 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-01-31 21:37:31,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2022-01-31 21:37:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2022-01-31 21:37:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 399 states have (on average 1.0100250626566416) internal successors, (403), 399 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 407 transitions. [2022-01-31 21:37:31,502 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 407 transitions. Word has length 397 [2022-01-31 21:37:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:37:31,502 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 407 transitions. [2022-01-31 21:37:31,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 3.7788461538461537) internal successors, (393), 103 states have internal predecessors, (393), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 407 transitions. [2022-01-31 21:37:31,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-01-31 21:37:31,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:37:31,503 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:37:31,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 21:37:31,504 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:37:31,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:37:31,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1342835902, now seen corresponding path program 97 times [2022-01-31 21:37:31,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:37:31,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388787387] [2022-01-31 21:37:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:37:31,551 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:31,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:31,595 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:31,612 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:31,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:31,647 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:31,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:37:31,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:31,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:37:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:31,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:37:35,218 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:37:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1388787387] [2022-01-31 21:37:35,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1388787387] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:37:35,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:37:35,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 21:37:35,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148204580] [2022-01-31 21:37:35,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:37:35,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 21:37:35,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:37:35,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 21:37:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=10811, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:37:35,220 INFO L87 Difference]: Start difference. First operand 404 states and 407 transitions. Second operand has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 102 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:49,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:37:49,573 INFO L93 Difference]: Finished difference Result 417 states and 425 transitions. [2022-01-31 21:37:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 21:37:49,574 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 102 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 401 [2022-01-31 21:37:49,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:37:49,575 INFO L225 Difference]: With dead ends: 417 [2022-01-31 21:37:49,575 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 21:37:49,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 298 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5835 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=828, Invalid=41402, Unknown=0, NotChecked=0, Total=42230 [2022-01-31 21:37:49,577 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 307 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 39604 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 39708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 39604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:37:49,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 606 Invalid, 39708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 39604 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-01-31 21:37:49,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 21:37:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-01-31 21:37:49,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 403 states have (on average 1.0099255583126552) internal successors, (407), 403 states have internal predecessors, (407), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 411 transitions. [2022-01-31 21:37:49,586 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 411 transitions. Word has length 401 [2022-01-31 21:37:49,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:37:49,586 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 411 transitions. [2022-01-31 21:37:49,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.854368932038835) internal successors, (397), 102 states have internal predecessors, (397), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:37:49,586 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 411 transitions. [2022-01-31 21:37:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2022-01-31 21:37:49,587 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:37:49,588 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:37:49,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 21:37:49,588 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:37:49,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:37:49,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1539982357, now seen corresponding path program 98 times [2022-01-31 21:37:49,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:37:49,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274723960] [2022-01-31 21:37:49,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:37:49,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:49,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:49,639 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:49,661 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:49,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:37:49,707 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:37:49,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:37:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:49,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:37:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:37:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:37:53,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:37:53,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274723960] [2022-01-31 21:37:53,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1274723960] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:37:53,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:37:53,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 21:37:53,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711015944] [2022-01-31 21:37:53,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:37:53,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 21:37:53,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:37:53,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 21:37:53,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=11020, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:37:53,412 INFO L87 Difference]: Start difference. First operand 408 states and 411 transitions. Second operand has 104 states, 104 states have (on average 3.855769230769231) internal successors, (401), 103 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:38:07,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:38:07,909 INFO L93 Difference]: Finished difference Result 421 states and 429 transitions. [2022-01-31 21:38:07,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 21:38:07,909 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.855769230769231) internal successors, (401), 103 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 405 [2022-01-31 21:38:07,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:38:07,910 INFO L225 Difference]: With dead ends: 421 [2022-01-31 21:38:07,910 INFO L226 Difference]: Without dead ends: 412 [2022-01-31 21:38:07,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 300 SyntacticMatches, 1 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5944 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=836, Invalid=42220, Unknown=0, NotChecked=0, Total=43056 [2022-01-31 21:38:07,912 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 311 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 40006 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 40111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 40006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:38:07,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 607 Invalid, 40111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 40006 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-01-31 21:38:07,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-01-31 21:38:07,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 412. [2022-01-31 21:38:07,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 407 states have (on average 1.00982800982801) internal successors, (411), 407 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:38:07,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 415 transitions. [2022-01-31 21:38:07,922 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 415 transitions. Word has length 405 [2022-01-31 21:38:07,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:38:07,922 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 415 transitions. [2022-01-31 21:38:07,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.855769230769231) internal successors, (401), 103 states have internal predecessors, (401), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:38:07,922 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 415 transitions. [2022-01-31 21:38:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2022-01-31 21:38:07,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:38:07,923 INFO L514 BasicCegarLoop]: trace histogram [100, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:38:07,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 21:38:07,924 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:38:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:38:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1822361620, now seen corresponding path program 99 times [2022-01-31 21:38:07,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:38:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [603154123] [2022-01-31 21:38:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:38:07,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:07,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:07,988 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:08,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:08,051 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:08,052 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:08,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:38:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:08,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:38:08,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:38:11,758 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:38:11,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [603154123] [2022-01-31 21:38:11,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [603154123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:38:11,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:38:11,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 21:38:11,758 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914983354] [2022-01-31 21:38:11,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:38:11,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 21:38:11,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:38:11,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 21:38:11,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=11132, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:38:11,760 INFO L87 Difference]: Start difference. First operand 412 states and 415 transitions. Second operand has 105 states, 105 states have (on average 3.857142857142857) internal successors, (405), 104 states have internal predecessors, (405), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:38:26,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:38:26,625 INFO L93 Difference]: Finished difference Result 425 states and 433 transitions. [2022-01-31 21:38:26,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 21:38:26,637 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 3.857142857142857) internal successors, (405), 104 states have internal predecessors, (405), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 409 [2022-01-31 21:38:26,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:38:26,638 INFO L225 Difference]: With dead ends: 425 [2022-01-31 21:38:26,638 INFO L226 Difference]: Without dead ends: 416 [2022-01-31 21:38:26,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5955 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1042, Invalid=42848, Unknown=0, NotChecked=0, Total=43890 [2022-01-31 21:38:26,640 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 314 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 41213 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 41319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 41213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:38:26,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 618 Invalid, 41319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 41213 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-01-31 21:38:26,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-31 21:38:26,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-01-31 21:38:26,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 411 states have (on average 1.0097323600973236) internal successors, (415), 411 states have internal predecessors, (415), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:38:26,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 419 transitions. [2022-01-31 21:38:26,649 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 419 transitions. Word has length 409 [2022-01-31 21:38:26,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:38:26,649 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 419 transitions. [2022-01-31 21:38:26,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 3.857142857142857) internal successors, (405), 104 states have internal predecessors, (405), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:38:26,650 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 419 transitions. [2022-01-31 21:38:26,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2022-01-31 21:38:26,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:38:26,651 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:38:26,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 21:38:26,651 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:38:26,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:38:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash -163846077, now seen corresponding path program 100 times [2022-01-31 21:38:26,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:38:26,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403971699] [2022-01-31 21:38:26,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:38:26,700 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:26,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:26,722 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:26,738 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:26,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:38:26,772 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:38:26,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:38:26,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:26,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:38:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:38:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:38:30,611 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:38:30,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403971699] [2022-01-31 21:38:30,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1403971699] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:38:30,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:38:30,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 21:38:30,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732809266] [2022-01-31 21:38:30,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:38:30,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 21:38:30,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:38:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 21:38:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=11444, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 21:38:30,613 INFO L87 Difference]: Start difference. First operand 416 states and 419 transitions. Second operand has 106 states, 106 states have (on average 3.858490566037736) internal successors, (409), 105 states have internal predecessors, (409), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)