/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_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:00:55,539 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:00:55,566 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:00:55,621 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:00:55,671 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 02:00:55,685 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:00:55,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:00:55,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:00:55,687 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:00:55,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:00:55,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:00:55,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:00:55,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:00:55,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:00:55,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:00:55,688 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:00:55,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:00:55,689 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:00:55,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:00:55,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:00:55,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:00:55,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:00:55,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:00:55,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:00:55,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:00:55,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:00:55,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:00:55,690 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:00:55,690 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:00:55,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:00:55,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:00:55,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:00:55,976 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:00:55,979 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:00:55,980 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-02-15 02:00:56,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6268ad6cc/75f3dad143c5480f80a12af9d8ff03dc/FLAG4f5806b3b [2022-02-15 02:00:56,420 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:00:56,420 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_3.c [2022-02-15 02:00:56,425 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6268ad6cc/75f3dad143c5480f80a12af9d8ff03dc/FLAG4f5806b3b [2022-02-15 02:00:56,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6268ad6cc/75f3dad143c5480f80a12af9d8ff03dc [2022-02-15 02:00:56,437 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:00:56,438 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:00:56,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:00:56,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:00:56,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:00:56,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ab4b595 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56, skipping insertion in model container [2022-02-15 02:00:56,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,450 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:00:56,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:00:56,566 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_3.c[318,331] [2022-02-15 02:00:56,579 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:00:56,584 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:00:56,600 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_3.c[318,331] [2022-02-15 02:00:56,605 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:00:56,634 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:00:56,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56 WrapperNode [2022-02-15 02:00:56,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:00:56,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:00:56,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:00:56,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:00:56,643 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,647 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,648 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,651 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,656 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:00:56,657 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:00:56,657 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:00:56,657 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:00:56,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (1/1) ... [2022-02-15 02:00:56,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:00:56,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:00:56,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 02:00:56,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 02:00:56,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:00:56,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:00:56,740 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:00:56,740 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 02:00:56,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:00:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:00:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:00:56,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:00:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:00:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 02:00:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:00:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:00:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:00:56,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:00:56,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:00:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:00:56,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:00:56,805 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:00:56,806 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:00:56,885 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:00:56,890 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:00:56,890 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 02:00:56,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:00:56 BoogieIcfgContainer [2022-02-15 02:00:56,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:00:56,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:00:56,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:00:56,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:00:56,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:00:56" (1/3) ... [2022-02-15 02:00:56,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f31c4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:00:56, skipping insertion in model container [2022-02-15 02:00:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:00:56" (2/3) ... [2022-02-15 02:00:56,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f31c4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:00:56, skipping insertion in model container [2022-02-15 02:00:56,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:00:56" (3/3) ... [2022-02-15 02:00:56,900 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_3.c [2022-02-15 02:00:56,903 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:00:56,904 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:00:56,937 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:00:56,943 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 02:00:56,943 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:00:56,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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) [2022-02-15 02:00:56,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 02:00:56,967 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:56,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:56,968 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-02-15 02:00:56,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:56,979 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [909844918] [2022-02-15 02:00:56,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:56,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:57,024 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:57,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:57,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:57,120 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:57,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [909844918] [2022-02-15 02:00:57,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [909844918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:57,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:57,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 02:00:57,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846851430] [2022-02-15 02:00:57,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:57,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 02:00:57,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 02:00:57,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 02:00:57,151 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:57,184 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-15 02:00:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 02:00:57,187 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 02:00:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:57,192 INFO L225 Difference]: With dead ends: 34 [2022-02-15 02:00:57,192 INFO L226 Difference]: Without dead ends: 14 [2022-02-15 02:00:57,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 02:00:57,197 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:57,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:00:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-15 02:00:57,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-15 02:00:57,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-15 02:00:57,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-15 02:00:57,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:57,225 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-15 02:00:57,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,226 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-15 02:00:57,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 02:00:57,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:57,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:57,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:00:57,227 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:57,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:57,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-02-15 02:00:57,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:57,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060252878] [2022-02-15 02:00:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:57,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:57,232 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:00:57,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:57,311 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:57,311 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060252878] [2022-02-15 02:00:57,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060252878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:57,312 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:57,312 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:00:57,312 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378277924] [2022-02-15 02:00:57,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:57,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:00:57,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:57,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:00:57,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:00:57,314 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:57,355 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-02-15 02:00:57,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:00:57,355 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 02:00:57,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:57,356 INFO L225 Difference]: With dead ends: 24 [2022-02-15 02:00:57,356 INFO L226 Difference]: Without dead ends: 16 [2022-02-15 02:00:57,357 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 [2022-02-15 02:00:57,358 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:57,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:00:57,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-15 02:00:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-15 02:00:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-15 02:00:57,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-15 02:00:57,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:57,366 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-15 02:00:57,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,366 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-15 02:00:57,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 02:00:57,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:57,367 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:57,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:00:57,367 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:57,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:57,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-02-15 02:00:57,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:57,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578540659] [2022-02-15 02:00:57,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:57,462 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:57,462 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:00:57,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:57,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:57,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578540659] [2022-02-15 02:00:57,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [578540659] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:57,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:57,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:00:57,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544733020] [2022-02-15 02:00:57,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:57,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:00:57,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:57,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:00:57,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:00:57,538 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:57,622 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-15 02:00:57,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:00:57,623 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 02:00:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:57,625 INFO L225 Difference]: With dead ends: 26 [2022-02-15 02:00:57,625 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 02:00:57,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:00:57,628 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:57,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:00:57,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 02:00:57,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-15 02:00:57,635 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) [2022-02-15 02:00:57,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-15 02:00:57,635 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-15 02:00:57,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:57,636 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-15 02:00:57,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,636 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-15 02:00:57,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 02:00:57,637 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:57,637 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:57,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:00:57,637 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:57,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:57,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-02-15 02:00:57,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:57,638 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469562648] [2022-02-15 02:00:57,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:57,766 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:57,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:57,811 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:57,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,008 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:58,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:58,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:58,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:58,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469562648] [2022-02-15 02:00:58,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469562648] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:58,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:58,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:00:58,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661756999] [2022-02-15 02:00:58,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:58,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:00:58,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:58,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:00:58,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:00:58,273 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:58,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:58,420 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-15 02:00:58,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:00:58,420 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 02:00:58,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:58,422 INFO L225 Difference]: With dead ends: 39 [2022-02-15 02:00:58,422 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 02:00:58,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:00:58,433 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:58,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 39 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:58,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 02:00:58,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-15 02:00:58,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 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) [2022-02-15 02:00:58,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-15 02:00:58,440 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-02-15 02:00:58,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:58,441 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-15 02:00:58,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:58,441 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-15 02:00:58,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 02:00:58,441 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:58,442 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:58,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:00:58,442 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:58,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:58,442 INFO L85 PathProgramCache]: Analyzing trace with hash -510493847, now seen corresponding path program 2 times [2022-02-15 02:00:58,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:58,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496406236] [2022-02-15 02:00:58,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:58,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,564 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:58,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:58,676 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:58,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:58,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:58,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:58,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496406236] [2022-02-15 02:00:58,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496406236] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:58,844 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:58,844 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:00:58,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054029736] [2022-02-15 02:00:58,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:00:58,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:58,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:00:58,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:00:58,846 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:58,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:58,988 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-02-15 02:00:58,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:00:58,988 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-15 02:00:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:58,989 INFO L225 Difference]: With dead ends: 47 [2022-02-15 02:00:58,989 INFO L226 Difference]: Without dead ends: 34 [2022-02-15 02:00:58,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:00:58,991 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:58,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-15 02:00:58,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2022-02-15 02:00:58,996 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) [2022-02-15 02:00:58,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-15 02:00:58,997 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2022-02-15 02:00:58,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:58,997 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-15 02:00:58,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:58,997 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-15 02:00:58,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 02:00:58,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:58,998 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:58,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:00:58,999 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:58,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:58,999 INFO L85 PathProgramCache]: Analyzing trace with hash 969620496, now seen corresponding path program 3 times [2022-02-15 02:00:58,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:58,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555202587] [2022-02-15 02:00:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:59,079 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,109 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:59,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,204 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:59,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:59,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:59,397 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:59,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555202587] [2022-02-15 02:00:59,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [555202587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:59,398 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:59,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:00:59,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887885931] [2022-02-15 02:00:59,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:59,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:00:59,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:00:59,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:00:59,400 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:59,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:59,628 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2022-02-15 02:00:59,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:00:59,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 02:00:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:59,629 INFO L225 Difference]: With dead ends: 53 [2022-02-15 02:00:59,629 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 02:00:59,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:00:59,630 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:59,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 39 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:00:59,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 02:00:59,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-02-15 02:00:59,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-15 02:00:59,636 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 27 [2022-02-15 02:00:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:59,637 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-15 02:00:59,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-15 02:00:59,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 02:00:59,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:59,638 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:59,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:00:59,638 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:59,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:59,638 INFO L85 PathProgramCache]: Analyzing trace with hash -777622499, now seen corresponding path program 4 times [2022-02-15 02:00:59,639 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:59,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494968532] [2022-02-15 02:00:59,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:59,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,725 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:59,753 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:59,808 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:59,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:59,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:59,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:59,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:00,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:00,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494968532] [2022-02-15 02:01:00,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [494968532] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:00,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:00,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:01:00,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472408293] [2022-02-15 02:01:00,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:00,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:01:00,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:00,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:01:00,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:01:00,070 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:00,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:00,393 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2022-02-15 02:01:00,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:01:00,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 02:01:00,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:00,395 INFO L225 Difference]: With dead ends: 75 [2022-02-15 02:01:00,395 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 02:01:00,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:01:00,396 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:00,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 19 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:00,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 02:01:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-15 02:01:00,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:00,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2022-02-15 02:01:00,405 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 32 [2022-02-15 02:01:00,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:00,405 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2022-02-15 02:01:00,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:00,406 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2022-02-15 02:01:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 02:01:00,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:00,407 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:00,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:01:00,407 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:00,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:00,407 INFO L85 PathProgramCache]: Analyzing trace with hash -522473983, now seen corresponding path program 5 times [2022-02-15 02:01:00,407 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:00,407 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321656700] [2022-02-15 02:01:00,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:00,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:00,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:00,501 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:00,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:00,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:00,583 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:00,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:00,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:00,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:00,832 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:00,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321656700] [2022-02-15 02:01:00,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [321656700] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:00,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:00,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:01:00,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801541234] [2022-02-15 02:01:00,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:00,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:01:00,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:00,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:01:00,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:01:00,834 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:01,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:01,170 INFO L93 Difference]: Finished difference Result 83 states and 97 transitions. [2022-02-15 02:01:01,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:01:01,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 02:01:01,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:01,171 INFO L225 Difference]: With dead ends: 83 [2022-02-15 02:01:01,171 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 02:01:01,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=839, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:01:01,174 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:01,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:01:01,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 02:01:01,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 41. [2022-02-15 02:01:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:01,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-02-15 02:01:01,180 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 35 [2022-02-15 02:01:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:01,181 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-02-15 02:01:01,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-02-15 02:01:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:01:01,182 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:01,182 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:01,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:01:01,182 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:01,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:01,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1503776332, now seen corresponding path program 6 times [2022-02-15 02:01:01,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:01,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155413841] [2022-02-15 02:01:01,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:01,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:01,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:01,303 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:01,329 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:01,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:01,376 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:01,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:01,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:01,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:01,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155413841] [2022-02-15 02:01:01,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1155413841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:01,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:01,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:01:01,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908981357] [2022-02-15 02:01:01,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:01,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:01:01,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:01,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:01:01,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:01:01,719 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:02,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:02,137 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-02-15 02:01:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:01:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 02:01:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:02,138 INFO L225 Difference]: With dead ends: 97 [2022-02-15 02:01:02,138 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 02:01:02,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=509, Invalid=1383, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:01:02,140 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:02,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:01:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 02:01:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-15 02:01:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:02,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2022-02-15 02:01:02,149 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 40 [2022-02-15 02:01:02,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:02,149 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2022-02-15 02:01:02,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:02,150 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2022-02-15 02:01:02,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:01:02,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:02,150 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:02,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:01:02,151 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:02,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:02,151 INFO L85 PathProgramCache]: Analyzing trace with hash 897664690, now seen corresponding path program 7 times [2022-02-15 02:01:02,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:02,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152005040] [2022-02-15 02:01:02,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:02,214 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:02,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:02,250 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:02,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:02,339 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:02,339 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:02,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:02,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:02,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:02,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:02,655 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:02,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152005040] [2022-02-15 02:01:02,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [152005040] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:02,655 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:02,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:01:02,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502455034] [2022-02-15 02:01:02,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:02,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:01:02,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:02,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:01:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:01:02,657 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:03,116 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2022-02-15 02:01:03,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:01:03,118 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-15 02:01:03,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:03,119 INFO L225 Difference]: With dead ends: 105 [2022-02-15 02:01:03,119 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 02:01:03,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=1419, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:01:03,120 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:03,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 44 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:01:03,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 02:01:03,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2022-02-15 02:01:03,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:03,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-02-15 02:01:03,126 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 43 [2022-02-15 02:01:03,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:03,126 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-02-15 02:01:03,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-02-15 02:01:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 02:01:03,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:03,127 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:03,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:01:03,127 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:03,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:03,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1296637509, now seen corresponding path program 8 times [2022-02-15 02:01:03,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:03,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440290438] [2022-02-15 02:01:03,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:03,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:03,234 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:03,234 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:03,260 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:03,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:03,301 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:03,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:03,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:03,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:03,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:03,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440290438] [2022-02-15 02:01:03,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440290438] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:03,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:03,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:01:03,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41609336] [2022-02-15 02:01:03,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:03,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:01:03,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:03,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:01:03,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:01:03,609 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:04,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:04,158 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2022-02-15 02:01:04,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:01:04,158 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 02:01:04,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:04,159 INFO L225 Difference]: With dead ends: 95 [2022-02-15 02:01:04,159 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 02:01:04,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=702, Invalid=1848, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:01:04,161 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:04,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 34 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:01:04,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 02:01:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-02-15 02:01:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-02-15 02:01:04,168 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 48 [2022-02-15 02:01:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:04,168 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-02-15 02:01:04,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-02-15 02:01:04,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 02:01:04,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:04,169 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:04,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:01:04,169 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:04,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1149355906, now seen corresponding path program 9 times [2022-02-15 02:01:04,170 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:04,170 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415577229] [2022-02-15 02:01:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:04,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,246 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:04,277 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,327 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,327 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:04,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:04,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:04,715 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:04,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415577229] [2022-02-15 02:01:04,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [415577229] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:04,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:04,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:01:04,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043194531] [2022-02-15 02:01:04,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:04,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:01:04,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:04,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:01:04,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:01:04,717 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:05,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:05,394 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2022-02-15 02:01:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:01:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 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 [2022-02-15 02:01:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:05,395 INFO L225 Difference]: With dead ends: 105 [2022-02-15 02:01:05,395 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 02:01:05,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=858, Invalid=2334, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:01:05,397 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:05,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 34 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:01:05,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 02:01:05,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-02-15 02:01:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:05,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-02-15 02:01:05,404 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 53 [2022-02-15 02:01:05,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:05,404 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-02-15 02:01:05,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:05,404 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-02-15 02:01:05,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:01:05,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:05,405 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:05,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:01:05,405 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:05,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash -246172433, now seen corresponding path program 10 times [2022-02-15 02:01:05,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:05,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640032473] [2022-02-15 02:01:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:05,453 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:05,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:05,474 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:05,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:05,565 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:05,565 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:05,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:05,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:05,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:05,986 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:05,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640032473] [2022-02-15 02:01:05,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1640032473] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:05,986 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:05,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:01:05,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986325949] [2022-02-15 02:01:05,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:05,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:01:05,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:05,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:01:05,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=711, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:01:05,988 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:06,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:06,743 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-02-15 02:01:06,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:01:06,744 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 02:01:06,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:06,745 INFO L225 Difference]: With dead ends: 115 [2022-02-15 02:01:06,745 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 02:01:06,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 02:01:06,746 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:06,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 34 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:01:06,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 02:01:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-02-15 02:01:06,759 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) [2022-02-15 02:01:06,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-02-15 02:01:06,760 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 58 [2022-02-15 02:01:06,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:06,760 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-02-15 02:01:06,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:06,760 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-02-15 02:01:06,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:01:06,761 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:06,761 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:06,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:01:06,761 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:06,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1013674058, now seen corresponding path program 11 times [2022-02-15 02:01:06,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:06,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666578006] [2022-02-15 02:01:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:06,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:06,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:06,852 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:06,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:06,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:06,943 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:06,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:06,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:07,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:07,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:07,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:07,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666578006] [2022-02-15 02:01:07,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1666578006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:07,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:07,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:01:07,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257299165] [2022-02-15 02:01:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:07,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:01:07,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:07,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:01:07,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:01:07,410 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:08,303 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2022-02-15 02:01:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:01:08,304 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-15 02:01:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:08,304 INFO L225 Difference]: With dead ends: 125 [2022-02-15 02:01:08,304 INFO L226 Difference]: Without dead ends: 69 [2022-02-15 02:01:08,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:01:08,306 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:08,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 49 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:01:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-15 02:01:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-15 02:01:08,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:08,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-02-15 02:01:08,319 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 63 [2022-02-15 02:01:08,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:08,319 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-02-15 02:01:08,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:08,319 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-02-15 02:01:08,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 02:01:08,320 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:08,320 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:08,320 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:01:08,320 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:08,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:08,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1957732899, now seen corresponding path program 12 times [2022-02-15 02:01:08,321 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:08,321 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691164241] [2022-02-15 02:01:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:08,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:08,405 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:08,406 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:08,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:08,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:08,479 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:08,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:08,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:09,083 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:09,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691164241] [2022-02-15 02:01:09,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691164241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:09,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:09,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:01:09,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993775258] [2022-02-15 02:01:09,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:09,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:01:09,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:09,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:01:09,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:01:09,086 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:10,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:10,228 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2022-02-15 02:01:10,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:01:10,229 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 02:01:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:10,229 INFO L225 Difference]: With dead ends: 135 [2022-02-15 02:01:10,230 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 02:01:10,232 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1416, Invalid=4134, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:01:10,232 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:10,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 24 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:01:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 02:01:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-02-15 02:01:10,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-02-15 02:01:10,238 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 68 [2022-02-15 02:01:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:10,239 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-02-15 02:01:10,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-02-15 02:01:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:01:10,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:10,240 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:10,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:01:10,240 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash 649604630, now seen corresponding path program 13 times [2022-02-15 02:01:10,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:10,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1445545695] [2022-02-15 02:01:10,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:10,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:10,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:10,317 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:10,349 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:10,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:10,410 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:10,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:10,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:11,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:11,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1445545695] [2022-02-15 02:01:11,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1445545695] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:11,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:11,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:01:11,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22942307] [2022-02-15 02:01:11,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:11,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:01:11,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:11,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:01:11,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1176, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:01:11,019 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:12,169 INFO L93 Difference]: Finished difference Result 145 states and 156 transitions. [2022-02-15 02:01:12,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:01:12,170 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 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 [2022-02-15 02:01:12,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:12,171 INFO L225 Difference]: With dead ends: 145 [2022-02-15 02:01:12,171 INFO L226 Difference]: Without dead ends: 79 [2022-02-15 02:01:12,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1632, Invalid=4848, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 02:01:12,173 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:12,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 24 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:01:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-15 02:01:12,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-15 02:01:12,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-02-15 02:01:12,178 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 73 [2022-02-15 02:01:12,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:12,178 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-02-15 02:01:12,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-02-15 02:01:12,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:01:12,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:12,180 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:12,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:01:12,180 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:12,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash -415340201, now seen corresponding path program 14 times [2022-02-15 02:01:12,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:12,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [877410936] [2022-02-15 02:01:12,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:12,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,251 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,252 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:12,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,353 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:12,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:12,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:12,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:12,995 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:12,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [877410936] [2022-02-15 02:01:12,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [877410936] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:12,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:12,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:01:12,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166330067] [2022-02-15 02:01:12,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:12,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:01:12,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:12,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:01:12,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:01:12,997 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:14,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:14,245 INFO L93 Difference]: Finished difference Result 155 states and 166 transitions. [2022-02-15 02:01:14,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 02:01:14,245 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-15 02:01:14,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:14,246 INFO L225 Difference]: With dead ends: 155 [2022-02-15 02:01:14,246 INFO L226 Difference]: Without dead ends: 84 [2022-02-15 02:01:14,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1863, Invalid=5619, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 02:01:14,248 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 149 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:14,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 44 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:01:14,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-15 02:01:14,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-02-15 02:01:14,253 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) [2022-02-15 02:01:14,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-02-15 02:01:14,253 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 78 [2022-02-15 02:01:14,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:14,253 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-02-15 02:01:14,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:14,254 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-02-15 02:01:14,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 02:01:14,254 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:14,254 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:14,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:01:14,255 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:14,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash -300699166, now seen corresponding path program 15 times [2022-02-15 02:01:14,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:14,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247513702] [2022-02-15 02:01:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:14,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:14,335 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:14,336 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:14,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:14,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:14,405 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:14,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:14,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:14,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:15,167 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:15,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247513702] [2022-02-15 02:01:15,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247513702] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:15,167 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:15,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 02:01:15,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548826885] [2022-02-15 02:01:15,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:15,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 02:01:15,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:15,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 02:01:15,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=1771, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:01:15,169 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:16,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:16,609 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2022-02-15 02:01:16,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 02:01:16,610 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 02:01:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:16,610 INFO L225 Difference]: With dead ends: 217 [2022-02-15 02:01:16,611 INFO L226 Difference]: Without dead ends: 141 [2022-02-15 02:01:16,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2188, Invalid=6932, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 02:01:16,614 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1751 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:16,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 34 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1751 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:01:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-15 02:01:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-02-15 02:01:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.036764705882353) internal successors, (141), 136 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:16,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-02-15 02:01:16,623 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 83 [2022-02-15 02:01:16,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:16,623 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-02-15 02:01:16,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-02-15 02:01:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 02:01:16,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:16,624 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:16,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:01:16,624 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:16,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:16,625 INFO L85 PathProgramCache]: Analyzing trace with hash -15736122, now seen corresponding path program 16 times [2022-02-15 02:01:16,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:16,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385730237] [2022-02-15 02:01:16,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:16,683 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:16,702 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:16,702 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:16,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:16,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:16,789 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:16,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:16,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:17,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:17,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385730237] [2022-02-15 02:01:17,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385730237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:17,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:17,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 02:01:17,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812446701] [2022-02-15 02:01:17,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:17,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 02:01:17,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:17,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 02:01:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=1678, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:01:17,492 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:19,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:19,050 INFO L93 Difference]: Finished difference Result 225 states and 239 transitions. [2022-02-15 02:01:19,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 02:01:19,050 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 02:01:19,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:19,051 INFO L225 Difference]: With dead ends: 225 [2022-02-15 02:01:19,051 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 02:01:19,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2614 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2310, Invalid=7002, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 02:01:19,052 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 133 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:19,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 49 Invalid, 1995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 1841 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:01:19,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 02:01:19,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 92. [2022-02-15 02:01:19,057 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) [2022-02-15 02:01:19,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-02-15 02:01:19,058 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 86 [2022-02-15 02:01:19,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:19,058 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-02-15 02:01:19,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:19,058 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-02-15 02:01:19,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 02:01:19,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:19,059 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:19,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:01:19,059 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:19,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 2127040595, now seen corresponding path program 17 times [2022-02-15 02:01:19,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:19,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745262610] [2022-02-15 02:01:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:19,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,122 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:19,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,196 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:19,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:19,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:19,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:19,993 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:19,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745262610] [2022-02-15 02:01:19,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1745262610] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:19,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:19,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 02:01:19,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800316903] [2022-02-15 02:01:19,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:19,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 02:01:19,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:19,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 02:01:19,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=1893, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:01:19,998 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 53 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 52 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:21,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:21,700 INFO L93 Difference]: Finished difference Result 181 states and 192 transitions. [2022-02-15 02:01:21,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 02:01:21,701 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 52 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-15 02:01:21,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:21,701 INFO L225 Difference]: With dead ends: 181 [2022-02-15 02:01:21,701 INFO L226 Difference]: Without dead ends: 97 [2022-02-15 02:01:21,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2583, Invalid=7923, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 02:01:21,703 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2049 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 2049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:21,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 34 Invalid, 2179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 2049 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:01:21,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-15 02:01:21,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-02-15 02:01:21,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:21,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-02-15 02:01:21,710 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2022-02-15 02:01:21,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:21,710 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-02-15 02:01:21,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 52 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:21,710 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-02-15 02:01:21,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 02:01:21,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:21,711 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:21,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:01:21,711 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:21,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1253519302, now seen corresponding path program 18 times [2022-02-15 02:01:21,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:21,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436275502] [2022-02-15 02:01:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:21,771 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:21,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:21,805 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:21,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:21,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:21,878 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:21,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:22,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:22,763 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:22,763 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436275502] [2022-02-15 02:01:22,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436275502] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:22,763 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:22,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 02:01:22,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600745034] [2022-02-15 02:01:22,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:22,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 02:01:22,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:22,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 02:01:22,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=2121, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 02:01:22,765 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 56 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 55 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:24,672 INFO L93 Difference]: Finished difference Result 191 states and 202 transitions. [2022-02-15 02:01:24,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 02:01:24,673 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 55 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-15 02:01:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:24,673 INFO L225 Difference]: With dead ends: 191 [2022-02-15 02:01:24,673 INFO L226 Difference]: Without dead ends: 102 [2022-02-15 02:01:24,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2871, Invalid=8901, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 02:01:24,676 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 151 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2335 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 2335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:24,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 69 Invalid, 2472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 2335 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:01:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-15 02:01:24,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-02-15 02:01:24,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:24,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-02-15 02:01:24,696 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 96 [2022-02-15 02:01:24,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:24,696 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-02-15 02:01:24,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 55 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:24,696 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-02-15 02:01:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 02:01:24,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:24,697 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:24,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:01:24,697 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:24,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:24,698 INFO L85 PathProgramCache]: Analyzing trace with hash 792532447, now seen corresponding path program 19 times [2022-02-15 02:01:24,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:24,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269622153] [2022-02-15 02:01:24,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:24,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:24,767 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:24,767 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:24,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:24,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:24,850 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:24,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:24,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:25,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:25,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:25,819 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269622153] [2022-02-15 02:01:25,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [269622153] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:25,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:25,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 02:01:25,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527862680] [2022-02-15 02:01:25,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:25,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 02:01:25,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:25,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 02:01:25,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 02:01:25,821 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 58 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) [2022-02-15 02:01:27,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:27,967 INFO L93 Difference]: Finished difference Result 201 states and 212 transitions. [2022-02-15 02:01:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 02:01:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 58 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 [2022-02-15 02:01:27,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:27,970 INFO L225 Difference]: With dead ends: 201 [2022-02-15 02:01:27,970 INFO L226 Difference]: Without dead ends: 107 [2022-02-15 02:01:27,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3174, Invalid=9936, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 02:01:27,972 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2588 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 2588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:27,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 39 Invalid, 2770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 2588 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:01:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-15 02:01:27,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-02-15 02:01:27,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:27,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-02-15 02:01:27,979 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 101 [2022-02-15 02:01:27,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:27,979 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-02-15 02:01:27,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 58 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) [2022-02-15 02:01:27,980 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-02-15 02:01:27,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-15 02:01:27,980 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:27,980 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:27,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:01:27,981 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:27,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1847916626, now seen corresponding path program 20 times [2022-02-15 02:01:27,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:27,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380069036] [2022-02-15 02:01:27,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:28,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,057 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:28,083 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,124 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:28,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:29,157 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:29,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380069036] [2022-02-15 02:01:29,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1380069036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:29,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:29,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 02:01:29,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057655996] [2022-02-15 02:01:29,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:29,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 02:01:29,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:29,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 02:01:29,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=2616, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 02:01:29,159 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:31,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:31,474 INFO L93 Difference]: Finished difference Result 211 states and 222 transitions. [2022-02-15 02:01:31,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 02:01:31,474 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-02-15 02:01:31,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:31,475 INFO L225 Difference]: With dead ends: 211 [2022-02-15 02:01:31,475 INFO L226 Difference]: Without dead ends: 112 [2022-02-15 02:01:31,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3492, Invalid=11028, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 02:01:31,476 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 245 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2889 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 2889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:31,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 49 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 2889 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:01:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-15 02:01:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-02-15 02:01:31,483 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) [2022-02-15 02:01:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-02-15 02:01:31,483 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 106 [2022-02-15 02:01:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:31,484 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-02-15 02:01:31,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-02-15 02:01:31,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-15 02:01:31,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:31,485 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:31,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:01:31,485 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:31,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:31,485 INFO L85 PathProgramCache]: Analyzing trace with hash -2108264085, now seen corresponding path program 21 times [2022-02-15 02:01:31,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:31,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [863244196] [2022-02-15 02:01:31,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:31,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:31,555 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:31,555 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:31,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:31,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:31,627 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:31,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:31,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:32,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:32,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [863244196] [2022-02-15 02:01:32,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [863244196] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:32,893 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:32,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 02:01:32,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069136514] [2022-02-15 02:01:32,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:32,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 02:01:32,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:32,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 02:01:32,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1374, Invalid=3182, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 02:01:32,894 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:35,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:35,420 INFO L93 Difference]: Finished difference Result 295 states and 306 transitions. [2022-02-15 02:01:35,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 02:01:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-02-15 02:01:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:35,421 INFO L225 Difference]: With dead ends: 295 [2022-02-15 02:01:35,421 INFO L226 Difference]: Without dead ends: 191 [2022-02-15 02:01:35,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3927, Invalid=12843, Unknown=0, NotChecked=0, Total=16770 [2022-02-15 02:01:35,423 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3413 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 3524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:35,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 79 Invalid, 3524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3413 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:01:35,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-02-15 02:01:35,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-02-15 02:01:35,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 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) [2022-02-15 02:01:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 195 transitions. [2022-02-15 02:01:35,435 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 195 transitions. Word has length 111 [2022-02-15 02:01:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:35,435 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 195 transitions. [2022-02-15 02:01:35,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:35,436 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 195 transitions. [2022-02-15 02:01:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-15 02:01:35,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:35,437 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:35,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:01:35,437 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:35,437 INFO L85 PathProgramCache]: Analyzing trace with hash -218952995, now seen corresponding path program 22 times [2022-02-15 02:01:35,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:35,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823881173] [2022-02-15 02:01:35,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:35,500 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:35,521 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:35,521 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:35,540 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:35,594 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:35,595 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:35,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:35,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:35,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:36,849 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:36,849 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823881173] [2022-02-15 02:01:36,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1823881173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:36,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:36,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 02:01:36,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427601196] [2022-02-15 02:01:36,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:36,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 02:01:36,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 02:01:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=3055, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:01:36,851 INFO L87 Difference]: Start difference. First operand 191 states and 195 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 66 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:39,491 INFO L93 Difference]: Finished difference Result 303 states and 317 transitions. [2022-02-15 02:01:39,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 02:01:39,491 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 66 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-15 02:01:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:39,492 INFO L225 Difference]: With dead ends: 303 [2022-02-15 02:01:39,492 INFO L226 Difference]: Without dead ends: 198 [2022-02-15 02:01:39,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4095, Invalid=12935, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 02:01:39,494 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3399 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 3399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:39,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 44 Invalid, 3646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 3399 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:01:39,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-15 02:01:39,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 120. [2022-02-15 02:01:39,501 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) [2022-02-15 02:01:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-02-15 02:01:39,502 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 114 [2022-02-15 02:01:39,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:39,502 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-02-15 02:01:39,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 66 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:39,503 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-02-15 02:01:39,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 02:01:39,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:39,503 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:39,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:01:39,503 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:39,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:39,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1018003940, now seen corresponding path program 23 times [2022-02-15 02:01:39,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:39,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305485447] [2022-02-15 02:01:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:39,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:39,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:39,566 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:39,591 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:39,643 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:39,643 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:39,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:39,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:39,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:40,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:40,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305485447] [2022-02-15 02:01:40,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305485447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:40,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:40,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 02:01:40,964 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168225983] [2022-02-15 02:01:40,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:40,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 02:01:40,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:40,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 02:01:40,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=3343, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 02:01:40,973 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:43,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:43,817 INFO L93 Difference]: Finished difference Result 237 states and 248 transitions. [2022-02-15 02:01:43,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 02:01:43,818 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-02-15 02:01:43,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:43,819 INFO L225 Difference]: With dead ends: 237 [2022-02-15 02:01:43,819 INFO L226 Difference]: Without dead ends: 125 [2022-02-15 02:01:43,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4455, Invalid=14177, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:01:43,822 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:43,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 29 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 3656 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:01:43,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-15 02:01:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-02-15 02:01:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-02-15 02:01:43,829 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 119 [2022-02-15 02:01:43,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:43,830 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-02-15 02:01:43,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-02-15 02:01:43,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-15 02:01:43,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:43,831 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:43,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:01:43,831 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1667721361, now seen corresponding path program 24 times [2022-02-15 02:01:43,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:43,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351828998] [2022-02-15 02:01:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:43,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:43,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:43,918 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:43,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:43,981 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:43,981 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:43,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:43,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:44,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:44,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:45,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:45,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351828998] [2022-02-15 02:01:45,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [351828998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:45,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:45,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 02:01:45,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210284739] [2022-02-15 02:01:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:45,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 02:01:45,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:45,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 02:01:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1612, Invalid=3644, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:01:45,408 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 73 states, 73 states have (on average 1.643835616438356) internal successors, (120), 72 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:48,656 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2022-02-15 02:01:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 02:01:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.643835616438356) internal successors, (120), 72 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-02-15 02:01:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:48,658 INFO L225 Difference]: With dead ends: 247 [2022-02-15 02:01:48,658 INFO L226 Difference]: Without dead ends: 130 [2022-02-15 02:01:48,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5795 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4830, Invalid=15476, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 02:01:48,661 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4087 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 4087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:48,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 49 Invalid, 4354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 4087 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:01:48,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-15 02:01:48,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-15 02:01:48,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.032) internal successors, (129), 125 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:48,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-02-15 02:01:48,669 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 124 [2022-02-15 02:01:48,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:48,669 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-02-15 02:01:48,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.643835616438356) internal successors, (120), 72 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:48,669 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-02-15 02:01:48,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-15 02:01:48,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:48,670 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:48,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:01:48,670 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:48,671 INFO L85 PathProgramCache]: Analyzing trace with hash -375497880, now seen corresponding path program 25 times [2022-02-15 02:01:48,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:48,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [121809473] [2022-02-15 02:01:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:48,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:48,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:48,758 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:48,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:48,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:48,840 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:48,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:49,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:50,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:50,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [121809473] [2022-02-15 02:01:50,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [121809473] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:50,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:50,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 02:01:50,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564798494] [2022-02-15 02:01:50,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:50,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 02:01:50,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:50,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 02:01:50,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1742, Invalid=3958, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 02:01:50,299 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 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) [2022-02-15 02:01:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:53,643 INFO L93 Difference]: Finished difference Result 257 states and 268 transitions. [2022-02-15 02:01:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 02:01:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 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 [2022-02-15 02:01:53,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:53,648 INFO L225 Difference]: With dead ends: 257 [2022-02-15 02:01:53,648 INFO L226 Difference]: Without dead ends: 135 [2022-02-15 02:01:53,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6299 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5220, Invalid=16832, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:01:53,650 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 203 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4425 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 4425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:53,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 49 Invalid, 4705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 4425 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:01:53,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-15 02:01:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-15 02:01:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-02-15 02:01:53,659 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 129 [2022-02-15 02:01:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:53,659 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-02-15 02:01:53,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 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) [2022-02-15 02:01:53,659 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-02-15 02:01:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-15 02:01:53,660 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:53,660 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:53,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:01:53,660 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:53,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1727954875, now seen corresponding path program 26 times [2022-02-15 02:01:53,661 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:53,661 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832762098] [2022-02-15 02:01:53,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:53,711 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:53,738 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:53,738 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:53,761 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:53,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:53,830 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:55,365 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:55,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832762098] [2022-02-15 02:01:55,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [832762098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:55,365 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:55,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-15 02:01:55,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352598] [2022-02-15 02:01:55,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:55,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-15 02:01:55,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:55,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-15 02:01:55,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1877, Invalid=4285, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 02:01:55,367 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:58,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:58,987 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2022-02-15 02:01:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 02:01:58,988 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-15 02:01:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:58,988 INFO L225 Difference]: With dead ends: 267 [2022-02-15 02:01:58,989 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 02:01:58,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6824 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5625, Invalid=18245, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 02:01:58,992 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 160 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4794 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 4794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:58,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 39 Invalid, 5033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 4794 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:01:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 02:01:59,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-15 02:01:59,010 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) [2022-02-15 02:01:59,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-02-15 02:01:59,011 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 134 [2022-02-15 02:01:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:59,011 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-02-15 02:01:59,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-02-15 02:01:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 02:01:59,012 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:59,012 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:59,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:01:59,012 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:59,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1660936524, now seen corresponding path program 27 times [2022-02-15 02:01:59,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:59,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481930287] [2022-02-15 02:01:59,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:59,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:59,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:59,094 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:59,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:59,168 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:59,169 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:59,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:59,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:59,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:59,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:00,844 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:00,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481930287] [2022-02-15 02:02:00,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [481930287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:00,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:00,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 02:02:00,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707019673] [2022-02-15 02:02:00,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:00,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 02:02:00,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:00,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 02:02:00,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2017, Invalid=4625, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 02:02:00,848 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:04,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:04,751 INFO L93 Difference]: Finished difference Result 277 states and 288 transitions. [2022-02-15 02:02:04,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 02:02:04,752 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-15 02:02:04,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:04,752 INFO L225 Difference]: With dead ends: 277 [2022-02-15 02:02:04,752 INFO L226 Difference]: Without dead ends: 145 [2022-02-15 02:02:04,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7370 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6045, Invalid=19715, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 02:02:04,755 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5206 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:04,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 34 Invalid, 5457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5206 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:02:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-15 02:02:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-02-15 02:02:04,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:04,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-02-15 02:02:04,763 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 139 [2022-02-15 02:02:04,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:04,764 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-02-15 02:02:04,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:04,764 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-02-15 02:02:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-15 02:02:04,764 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:04,765 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:04,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:02:04,765 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:04,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:04,765 INFO L85 PathProgramCache]: Analyzing trace with hash -629534215, now seen corresponding path program 28 times [2022-02-15 02:02:04,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:04,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809106897] [2022-02-15 02:02:04,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:04,811 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:04,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:04,835 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:04,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:04,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:04,929 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:04,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:05,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:05,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:06,710 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:06,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809106897] [2022-02-15 02:02:06,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [809106897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:06,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:06,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 02:02:06,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357081041] [2022-02-15 02:02:06,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:06,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 02:02:06,712 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 02:02:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2162, Invalid=4978, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 02:02:06,713 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:10,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:10,966 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2022-02-15 02:02:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 02:02:10,967 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-15 02:02:10,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:10,967 INFO L225 Difference]: With dead ends: 287 [2022-02-15 02:02:10,968 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 02:02:10,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7937 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6480, Invalid=21242, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 02:02:10,971 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 443 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5679 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 5679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:10,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 44 Invalid, 6215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 5679 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 02:02:10,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 02:02:10,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-02-15 02:02:10,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-02-15 02:02:10,980 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 144 [2022-02-15 02:02:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:10,980 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-02-15 02:02:10,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:10,980 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-02-15 02:02:10,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-15 02:02:10,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:10,981 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:10,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:02:10,982 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:10,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:10,982 INFO L85 PathProgramCache]: Analyzing trace with hash 467601408, now seen corresponding path program 29 times [2022-02-15 02:02:10,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:10,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781520889] [2022-02-15 02:02:10,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:11,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:11,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:11,078 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:11,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:11,160 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:11,160 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:11,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:11,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:11,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:13,174 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:13,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781520889] [2022-02-15 02:02:13,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [781520889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:13,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:13,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 02:02:13,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985681760] [2022-02-15 02:02:13,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:13,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 02:02:13,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:13,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 02:02:13,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2440, Invalid=5750, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 02:02:13,177 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 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) [2022-02-15 02:02:17,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:17,799 INFO L93 Difference]: Finished difference Result 401 states and 412 transitions. [2022-02-15 02:02:17,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 02:02:17,800 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 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 [2022-02-15 02:02:17,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:17,802 INFO L225 Difference]: With dead ends: 401 [2022-02-15 02:02:17,802 INFO L226 Difference]: Without dead ends: 259 [2022-02-15 02:02:17,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9026 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=7063, Invalid=23737, Unknown=0, NotChecked=0, Total=30800 [2022-02-15 02:02:17,803 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 406 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6308 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 406 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 6308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:17,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [406 Valid, 49 Invalid, 6742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 6308 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:02:17,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-15 02:02:17,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-02-15 02:02:17,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0196850393700787) internal successors, (259), 254 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) [2022-02-15 02:02:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 263 transitions. [2022-02-15 02:02:17,823 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 263 transitions. Word has length 149 [2022-02-15 02:02:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:17,823 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 263 transitions. [2022-02-15 02:02:17,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 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) [2022-02-15 02:02:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 263 transitions. [2022-02-15 02:02:17,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-15 02:02:17,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:17,824 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:17,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:02:17,824 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:17,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash -723682520, now seen corresponding path program 30 times [2022-02-15 02:02:17,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:17,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436475803] [2022-02-15 02:02:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:17,869 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:17,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:17,902 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:17,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:17,974 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:17,974 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:17,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:17,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:18,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:18,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:19,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:19,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436475803] [2022-02-15 02:02:19,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [436475803] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:19,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:19,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-15 02:02:19,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375839587] [2022-02-15 02:02:19,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:19,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-15 02:02:19,923 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:19,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-15 02:02:19,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2433, Invalid=5577, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 02:02:19,924 INFO L87 Difference]: Start difference. First operand 259 states and 263 transitions. Second operand has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 89 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:24,568 INFO L93 Difference]: Finished difference Result 409 states and 423 transitions. [2022-02-15 02:02:24,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-15 02:02:24,568 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 89 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-02-15 02:02:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:24,569 INFO L225 Difference]: With dead ends: 409 [2022-02-15 02:02:24,569 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 02:02:24,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8956 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7293, Invalid=23859, Unknown=0, NotChecked=0, Total=31152 [2022-02-15 02:02:24,572 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 294 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6250 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 6643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 6250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:24,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 34 Invalid, 6643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 6250 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:02:24,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 02:02:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 158. [2022-02-15 02:02:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.026143790849673) internal successors, (157), 153 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:24,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 161 transitions. [2022-02-15 02:02:24,583 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 161 transitions. Word has length 152 [2022-02-15 02:02:24,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:24,583 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 161 transitions. [2022-02-15 02:02:24,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 89 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:24,583 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 161 transitions. [2022-02-15 02:02:24,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-15 02:02:24,584 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:24,584 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:24,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:02:24,584 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:24,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:24,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1427312975, now seen corresponding path program 31 times [2022-02-15 02:02:24,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:24,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224144417] [2022-02-15 02:02:24,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:24,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:24,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:24,664 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:24,682 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:24,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:24,724 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:24,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:24,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:25,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:25,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:26,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:26,911 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224144417] [2022-02-15 02:02:26,911 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224144417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:26,911 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:26,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-15 02:02:26,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134218204] [2022-02-15 02:02:26,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:26,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-15 02:02:26,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:26,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-15 02:02:26,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2592, Invalid=5964, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 02:02:26,914 INFO L87 Difference]: Start difference. First operand 158 states and 161 transitions. Second operand has 93 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 92 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) [2022-02-15 02:02:31,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:31,814 INFO L93 Difference]: Finished difference Result 313 states and 324 transitions. [2022-02-15 02:02:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 02:02:31,814 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 92 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 [2022-02-15 02:02:31,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:31,815 INFO L225 Difference]: With dead ends: 313 [2022-02-15 02:02:31,815 INFO L226 Difference]: Without dead ends: 163 [2022-02-15 02:02:31,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9580 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=7770, Invalid=25536, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 02:02:31,818 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 367 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 6680 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 6964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 6680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:31,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 29 Invalid, 6964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 6680 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:02:31,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-15 02:02:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-02-15 02:02:31,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-02-15 02:02:31,827 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 157 [2022-02-15 02:02:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:31,828 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-02-15 02:02:31,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 92 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) [2022-02-15 02:02:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-02-15 02:02:31,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-02-15 02:02:31,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:31,829 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:31,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:02:31,829 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:31,829 INFO L85 PathProgramCache]: Analyzing trace with hash -788602084, now seen corresponding path program 32 times [2022-02-15 02:02:31,829 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:31,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1045329901] [2022-02-15 02:02:31,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:31,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:31,896 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:31,897 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:31,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:31,988 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:31,988 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:31,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:32,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:32,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:32,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:34,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:34,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1045329901] [2022-02-15 02:02:34,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1045329901] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:34,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:34,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-15 02:02:34,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420078312] [2022-02-15 02:02:34,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:34,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-15 02:02:34,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:34,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-15 02:02:34,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2756, Invalid=6364, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 02:02:34,272 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 96 states, 96 states have (on average 1.6458333333333333) internal successors, (158), 95 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:39,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:39,584 INFO L93 Difference]: Finished difference Result 323 states and 334 transitions. [2022-02-15 02:02:39,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 02:02:39,584 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.6458333333333333) internal successors, (158), 95 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-02-15 02:02:39,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:39,585 INFO L225 Difference]: With dead ends: 323 [2022-02-15 02:02:39,585 INFO L226 Difference]: Without dead ends: 168 [2022-02-15 02:02:39,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10225 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8262, Invalid=27270, Unknown=0, NotChecked=0, Total=35532 [2022-02-15 02:02:39,587 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 254 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 7226 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 7577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 7226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:39,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 64 Invalid, 7577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 7226 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:02:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-15 02:02:39,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-02-15 02:02:39,596 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) [2022-02-15 02:02:39,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 171 transitions. [2022-02-15 02:02:39,597 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 171 transitions. Word has length 162 [2022-02-15 02:02:39,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:39,597 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 171 transitions. [2022-02-15 02:02:39,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.6458333333333333) internal successors, (158), 95 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:39,597 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 171 transitions. [2022-02-15 02:02:39,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-02-15 02:02:39,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:39,598 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:39,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:02:39,598 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:39,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:39,599 INFO L85 PathProgramCache]: Analyzing trace with hash -198858307, now seen corresponding path program 33 times [2022-02-15 02:02:39,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:39,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264906635] [2022-02-15 02:02:39,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:39,640 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:39,666 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:39,666 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:39,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:39,721 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:39,721 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:39,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:40,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:40,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:42,147 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:42,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264906635] [2022-02-15 02:02:42,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1264906635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:42,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:42,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-15 02:02:42,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897546510] [2022-02-15 02:02:42,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:42,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-15 02:02:42,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:42,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-15 02:02:42,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3068, Invalid=7234, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 02:02:42,150 INFO L87 Difference]: Start difference. First operand 168 states and 171 transitions. Second operand has 99 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 98 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:47,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:47,894 INFO L93 Difference]: Finished difference Result 451 states and 462 transitions. [2022-02-15 02:02:47,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 02:02:47,894 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 98 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-02-15 02:02:47,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:47,895 INFO L225 Difference]: With dead ends: 451 [2022-02-15 02:02:47,895 INFO L226 Difference]: Without dead ends: 291 [2022-02-15 02:02:47,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11456 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8917, Invalid=30089, Unknown=0, NotChecked=0, Total=39006 [2022-02-15 02:02:47,897 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 517 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7996 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 8546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 7996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:47,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 39 Invalid, 8546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 7996 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:02:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-15 02:02:47,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2022-02-15 02:02:47,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.0174825174825175) internal successors, (291), 286 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:47,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 295 transitions. [2022-02-15 02:02:47,913 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 295 transitions. Word has length 167 [2022-02-15 02:02:47,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:47,913 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 295 transitions. [2022-02-15 02:02:47,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 98 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:47,914 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 295 transitions. [2022-02-15 02:02:47,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-15 02:02:47,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:47,915 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:47,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:02:47,915 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:47,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:47,915 INFO L85 PathProgramCache]: Analyzing trace with hash -497645109, now seen corresponding path program 34 times [2022-02-15 02:02:47,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:47,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [49803297] [2022-02-15 02:02:47,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:47,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:47,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:47,989 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:48,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:48,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:48,065 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:48,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:48,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:50,390 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:50,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [49803297] [2022-02-15 02:02:50,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [49803297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:50,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:50,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-15 02:02:50,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799841267] [2022-02-15 02:02:50,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:50,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-15 02:02:50,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:50,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-15 02:02:50,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3061, Invalid=7039, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 02:02:50,393 INFO L87 Difference]: Start difference. First operand 291 states and 295 transitions. Second operand has 101 states, 101 states have (on average 1.6435643564356435) internal successors, (166), 100 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:56,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:56,153 INFO L93 Difference]: Finished difference Result 459 states and 473 transitions. [2022-02-15 02:02:56,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 02:02:56,153 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.6435643564356435) internal successors, (166), 100 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-02-15 02:02:56,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:56,155 INFO L225 Difference]: With dead ends: 459 [2022-02-15 02:02:56,157 INFO L226 Difference]: Without dead ends: 298 [2022-02-15 02:02:56,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11377 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9177, Invalid=30225, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 02:02:56,160 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 202 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7927 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 7927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:56,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 34 Invalid, 8231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 7927 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 02:02:56,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-15 02:02:56,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 176. [2022-02-15 02:02:56,170 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) [2022-02-15 02:02:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 179 transitions. [2022-02-15 02:02:56,170 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 179 transitions. Word has length 170 [2022-02-15 02:02:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:56,171 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 179 transitions. [2022-02-15 02:02:56,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.6435643564356435) internal successors, (166), 100 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:56,171 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 179 transitions. [2022-02-15 02:02:56,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-15 02:02:56,172 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:56,172 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:56,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:02:56,172 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:56,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:56,172 INFO L85 PathProgramCache]: Analyzing trace with hash -2049932562, now seen corresponding path program 35 times [2022-02-15 02:02:56,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:56,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230648299] [2022-02-15 02:02:56,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:56,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,245 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:56,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,314 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:56,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:56,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:58,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:58,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230648299] [2022-02-15 02:02:58,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230648299] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:58,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:58,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-15 02:02:58,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674067741] [2022-02-15 02:02:58,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:58,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-15 02:02:58,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-15 02:02:58,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3239, Invalid=7473, Unknown=0, NotChecked=0, Total=10712 [2022-02-15 02:02:58,770 INFO L87 Difference]: Start difference. First operand 176 states and 179 transitions. Second operand has 104 states, 104 states have (on average 1.6442307692307692) internal successors, (171), 103 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:04,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:04,873 INFO L93 Difference]: Finished difference Result 349 states and 360 transitions. [2022-02-15 02:03:04,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-15 02:03:04,873 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.6442307692307692) internal successors, (171), 103 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-02-15 02:03:04,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:04,874 INFO L225 Difference]: With dead ends: 349 [2022-02-15 02:03:04,874 INFO L226 Difference]: Without dead ends: 181 [2022-02-15 02:03:04,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12079 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9711, Invalid=32109, Unknown=0, NotChecked=0, Total=41820 [2022-02-15 02:03:04,876 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 274 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8478 mSolverCounterSat, 380 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 380 IncrementalHoareTripleChecker+Valid, 8478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:04,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 54 Invalid, 8858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [380 Valid, 8478 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 02:03:04,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-02-15 02:03:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-02-15 02:03:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-02-15 02:03:04,885 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 175 [2022-02-15 02:03:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:04,885 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-02-15 02:03:04,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.6442307692307692) internal successors, (171), 103 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:04,886 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-02-15 02:03:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-02-15 02:03:04,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:04,887 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:04,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:03:04,887 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:04,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:04,887 INFO L85 PathProgramCache]: Analyzing trace with hash 777000959, now seen corresponding path program 36 times [2022-02-15 02:03:04,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:04,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367585605] [2022-02-15 02:03:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:04,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:04,954 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:04,954 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:04,979 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:05,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:05,031 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:05,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:05,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:05,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:07,688 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:07,688 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367585605] [2022-02-15 02:03:07,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [367585605] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:07,688 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:07,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-15 02:03:07,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637743548] [2022-02-15 02:03:07,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:07,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-15 02:03:07,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:07,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-15 02:03:07,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3422, Invalid=7920, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 02:03:07,691 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 107 states, 107 states have (on average 1.644859813084112) internal successors, (176), 106 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:14,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:14,218 INFO L93 Difference]: Finished difference Result 359 states and 370 transitions. [2022-02-15 02:03:14,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-15 02:03:14,218 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.644859813084112) internal successors, (176), 106 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-02-15 02:03:14,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:14,219 INFO L225 Difference]: With dead ends: 359 [2022-02-15 02:03:14,219 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 02:03:14,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12802 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=10260, Invalid=34050, Unknown=0, NotChecked=0, Total=44310 [2022-02-15 02:03:14,222 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 488 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8929 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 8929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:14,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [488 Valid, 29 Invalid, 9393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 8929 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 02:03:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 02:03:14,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-02-15 02:03:14,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.022099447513812) internal successors, (185), 181 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:14,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 189 transitions. [2022-02-15 02:03:14,230 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 189 transitions. Word has length 180 [2022-02-15 02:03:14,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:14,230 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 189 transitions. [2022-02-15 02:03:14,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.644859813084112) internal successors, (176), 106 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:14,230 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 189 transitions. [2022-02-15 02:03:14,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-15 02:03:14,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:14,231 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:14,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:03:14,231 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:14,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:14,231 INFO L85 PathProgramCache]: Analyzing trace with hash 870694842, now seen corresponding path program 37 times [2022-02-15 02:03:14,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:14,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603049639] [2022-02-15 02:03:14,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:14,298 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:14,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:14,323 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:14,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:14,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:14,408 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:14,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:14,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:14,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:17,171 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:17,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603049639] [2022-02-15 02:03:17,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603049639] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:17,172 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:17,172 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-15 02:03:17,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677910931] [2022-02-15 02:03:17,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:17,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-15 02:03:17,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:17,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-15 02:03:17,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3610, Invalid=8380, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 02:03:17,173 INFO L87 Difference]: Start difference. First operand 186 states and 189 transitions. Second operand has 110 states, 110 states have (on average 1.6454545454545455) internal successors, (181), 109 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) [2022-02-15 02:03:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:24,064 INFO L93 Difference]: Finished difference Result 369 states and 380 transitions. [2022-02-15 02:03:24,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-15 02:03:24,066 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.6454545454545455) internal successors, (181), 109 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 [2022-02-15 02:03:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:24,066 INFO L225 Difference]: With dead ends: 369 [2022-02-15 02:03:24,066 INFO L226 Difference]: Without dead ends: 191 [2022-02-15 02:03:24,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13546 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=10824, Invalid=36048, Unknown=0, NotChecked=0, Total=46872 [2022-02-15 02:03:24,069 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 504 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9583 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 10197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 9583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:24,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 49 Invalid, 10197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 9583 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 02:03:24,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-02-15 02:03:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-02-15 02:03:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-02-15 02:03:24,076 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 185 [2022-02-15 02:03:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:24,077 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-02-15 02:03:24,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.6454545454545455) internal successors, (181), 109 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) [2022-02-15 02:03:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-02-15 02:03:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-02-15 02:03:24,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:24,078 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:24,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:03:24,078 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:24,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1208729549, now seen corresponding path program 38 times [2022-02-15 02:03:24,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:24,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289104057] [2022-02-15 02:03:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:24,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:24,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:24,144 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:24,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:24,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:24,210 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:24,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:24,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:24,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:27,092 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:27,092 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289104057] [2022-02-15 02:03:27,092 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1289104057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:27,092 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:27,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-15 02:03:27,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984154642] [2022-02-15 02:03:27,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:27,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-15 02:03:27,093 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:27,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-15 02:03:27,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3803, Invalid=8853, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 02:03:27,095 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 113 states, 113 states have (on average 1.6460176991150441) internal successors, (186), 112 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:34,262 INFO L93 Difference]: Finished difference Result 379 states and 390 transitions. [2022-02-15 02:03:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-15 02:03:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.6460176991150441) internal successors, (186), 112 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-02-15 02:03:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:34,263 INFO L225 Difference]: With dead ends: 379 [2022-02-15 02:03:34,263 INFO L226 Difference]: Without dead ends: 196 [2022-02-15 02:03:34,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14311 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=11403, Invalid=38103, Unknown=0, NotChecked=0, Total=49506 [2022-02-15 02:03:34,266 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 299 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10053 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 10053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:34,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 29 Invalid, 10467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 10053 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 02:03:34,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-15 02:03:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-02-15 02:03:34,276 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) [2022-02-15 02:03:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-02-15 02:03:34,277 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 190 [2022-02-15 02:03:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:34,277 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-02-15 02:03:34,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.6460176991150441) internal successors, (186), 112 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:34,277 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-02-15 02:03:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-02-15 02:03:34,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:34,278 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:34,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:03:34,279 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:34,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:34,279 INFO L85 PathProgramCache]: Analyzing trace with hash 780665478, now seen corresponding path program 39 times [2022-02-15 02:03:34,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:34,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395892637] [2022-02-15 02:03:34,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:34,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:34,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:34,338 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:34,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:34,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:34,414 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:34,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:35,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:35,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:35,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:37,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:37,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395892637] [2022-02-15 02:03:37,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395892637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:37,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:37,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-15 02:03:37,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89376607] [2022-02-15 02:03:37,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:37,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-15 02:03:37,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-15 02:03:37,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4001, Invalid=9339, Unknown=0, NotChecked=0, Total=13340 [2022-02-15 02:03:37,418 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 116 states, 116 states have (on average 1.646551724137931) internal successors, (191), 115 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:45,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:45,047 INFO L93 Difference]: Finished difference Result 389 states and 400 transitions. [2022-02-15 02:03:45,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-15 02:03:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.646551724137931) internal successors, (191), 115 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-02-15 02:03:45,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:45,048 INFO L225 Difference]: With dead ends: 389 [2022-02-15 02:03:45,048 INFO L226 Difference]: Without dead ends: 201 [2022-02-15 02:03:45,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15097 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=11997, Invalid=40215, Unknown=0, NotChecked=0, Total=52212 [2022-02-15 02:03:45,051 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 457 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10645 mSolverCounterSat, 576 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 11221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 576 IncrementalHoareTripleChecker+Valid, 10645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:45,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [457 Valid, 49 Invalid, 11221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [576 Valid, 10645 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:03:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-15 02:03:45,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-02-15 02:03:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2022-02-15 02:03:45,058 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 195 [2022-02-15 02:03:45,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:45,059 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2022-02-15 02:03:45,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.646551724137931) internal successors, (191), 115 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:45,059 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2022-02-15 02:03:45,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-15 02:03:45,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:45,059 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:45,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:03:45,060 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:45,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:45,060 INFO L85 PathProgramCache]: Analyzing trace with hash -243023257, now seen corresponding path program 40 times [2022-02-15 02:03:45,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:45,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052016384] [2022-02-15 02:03:45,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:45,114 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:45,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:45,139 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:45,164 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:45,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:45,207 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:45,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:45,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:45,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:45,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:45,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:48,422 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:48,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052016384] [2022-02-15 02:03:48,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052016384] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:48,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:48,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-15 02:03:48,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522620744] [2022-02-15 02:03:48,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:48,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-15 02:03:48,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:48,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-15 02:03:48,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4374, Invalid=10388, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 02:03:48,426 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:56,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:56,584 INFO L93 Difference]: Finished difference Result 543 states and 554 transitions. [2022-02-15 02:03:56,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-15 02:03:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-02-15 02:03:56,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:56,587 INFO L225 Difference]: With dead ends: 543 [2022-02-15 02:03:56,587 INFO L226 Difference]: Without dead ends: 350 [2022-02-15 02:03:56,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16587 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=12781, Invalid=43625, Unknown=0, NotChecked=0, Total=56406 [2022-02-15 02:03:56,594 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 623 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11400 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 11400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:56,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 29 Invalid, 12060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 11400 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-15 02:03:56,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-15 02:03:56,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 350. [2022-02-15 02:03:56,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 345 states have (on average 1.0144927536231885) internal successors, (350), 345 states have internal predecessors, (350), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 354 transitions. [2022-02-15 02:03:56,620 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 354 transitions. Word has length 200 [2022-02-15 02:03:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:56,620 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 354 transitions. [2022-02-15 02:03:56,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 354 transitions. [2022-02-15 02:03:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-15 02:03:56,622 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:56,622 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:56,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:03:56,622 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash 484571639, now seen corresponding path program 41 times [2022-02-15 02:03:56,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:56,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822876442] [2022-02-15 02:03:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:56,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:56,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:56,717 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:56,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:56,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:56,796 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:56,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:57,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:00,065 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:00,065 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822876442] [2022-02-15 02:04:00,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [822876442] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:00,065 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:00,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-15 02:04:00,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288750349] [2022-02-15 02:04:00,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:00,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-15 02:04:00,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:00,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-15 02:04:00,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4367, Invalid=10153, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 02:04:00,068 INFO L87 Difference]: Start difference. First operand 350 states and 354 transitions. Second operand has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:08,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:08,260 INFO L93 Difference]: Finished difference Result 551 states and 565 transitions. [2022-02-15 02:04:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-15 02:04:08,260 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-02-15 02:04:08,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:08,261 INFO L225 Difference]: With dead ends: 551 [2022-02-15 02:04:08,261 INFO L226 Difference]: Without dead ends: 357 [2022-02-15 02:04:08,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16490 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=13095, Invalid=43787, Unknown=0, NotChecked=0, Total=56882 [2022-02-15 02:04:08,265 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 319 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11492 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 11779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 11492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:08,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 49 Invalid, 11779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 11492 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-15 02:04:08,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2022-02-15 02:04:08,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 209. [2022-02-15 02:04:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:08,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2022-02-15 02:04:08,277 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 203 [2022-02-15 02:04:08,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:08,277 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2022-02-15 02:04:08,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:08,277 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2022-02-15 02:04:08,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-02-15 02:04:08,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:08,278 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:08,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:04:08,278 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:08,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:08,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1681411862, now seen corresponding path program 42 times [2022-02-15 02:04:08,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:08,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029838097] [2022-02-15 02:04:08,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:08,328 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:08,354 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:08,354 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:08,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:08,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:08,417 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:08,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:08,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:09,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:09,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:11,793 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:11,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029838097] [2022-02-15 02:04:11,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2029838097] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:11,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:11,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-15 02:04:11,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599641727] [2022-02-15 02:04:11,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:11,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-15 02:04:11,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:11,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-15 02:04:11,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=10673, Unknown=0, NotChecked=0, Total=15252 [2022-02-15 02:04:11,796 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 124 states, 124 states have (on average 1.6451612903225807) internal successors, (204), 123 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:20,595 INFO L93 Difference]: Finished difference Result 415 states and 426 transitions. [2022-02-15 02:04:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-15 02:04:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.6451612903225807) internal successors, (204), 123 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-02-15 02:04:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:20,596 INFO L225 Difference]: With dead ends: 415 [2022-02-15 02:04:20,596 INFO L226 Difference]: Without dead ends: 214 [2022-02-15 02:04:20,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17333 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=13731, Invalid=46049, Unknown=0, NotChecked=0, Total=59780 [2022-02-15 02:04:20,600 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 887 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12162 mSolverCounterSat, 1017 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 13179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1017 IncrementalHoareTripleChecker+Valid, 12162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:20,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 19 Invalid, 13179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1017 Valid, 12162 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:04:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-15 02:04:20,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-02-15 02:04:20,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0191387559808613) internal successors, (213), 209 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:20,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 217 transitions. [2022-02-15 02:04:20,611 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 217 transitions. Word has length 208 [2022-02-15 02:04:20,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:20,611 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 217 transitions. [2022-02-15 02:04:20,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.6451612903225807) internal successors, (204), 123 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:20,611 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 217 transitions. [2022-02-15 02:04:20,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-15 02:04:20,612 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:20,613 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:20,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:04:20,613 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash -806240637, now seen corresponding path program 43 times [2022-02-15 02:04:20,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:20,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368530907] [2022-02-15 02:04:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:20,669 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,702 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,702 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:20,728 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,782 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,782 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:20,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:21,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:21,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:24,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:24,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368530907] [2022-02-15 02:04:24,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368530907] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:24,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:24,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-02-15 02:04:24,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938141149] [2022-02-15 02:04:24,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:24,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-02-15 02:04:24,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:24,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-02-15 02:04:24,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4977, Invalid=11793, Unknown=0, NotChecked=0, Total=16770 [2022-02-15 02:04:24,447 INFO L87 Difference]: Start difference. First operand 214 states and 217 transitions. Second operand has 127 states, 127 states have (on average 1.6456692913385826) internal successors, (209), 126 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) [2022-02-15 02:04:33,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:33,645 INFO L93 Difference]: Finished difference Result 579 states and 590 transitions. [2022-02-15 02:04:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-15 02:04:33,645 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.6456692913385826) internal successors, (209), 126 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 [2022-02-15 02:04:33,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:33,646 INFO L225 Difference]: With dead ends: 579 [2022-02-15 02:04:33,646 INFO L226 Difference]: Without dead ends: 373 [2022-02-15 02:04:33,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18926 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=14568, Invalid=49694, Unknown=0, NotChecked=0, Total=64262 [2022-02-15 02:04:33,651 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 335 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 13127 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 13504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 13127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:33,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 39 Invalid, 13504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 13127 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 02:04:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-02-15 02:04:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2022-02-15 02:04:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.013586956521739) internal successors, (373), 368 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:33,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 377 transitions. [2022-02-15 02:04:33,672 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 377 transitions. Word has length 213 [2022-02-15 02:04:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:33,672 INFO L470 AbstractCegarLoop]: Abstraction has 373 states and 377 transitions. [2022-02-15 02:04:33,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.6456692913385826) internal successors, (209), 126 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) [2022-02-15 02:04:33,673 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 377 transitions. [2022-02-15 02:04:33,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-02-15 02:04:33,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:33,674 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:33,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 02:04:33,674 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:33,674 INFO L85 PathProgramCache]: Analyzing trace with hash 771812613, now seen corresponding path program 44 times [2022-02-15 02:04:33,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:33,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735324757] [2022-02-15 02:04:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:33,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:33,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:33,740 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:33,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:33,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:33,829 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:33,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:33,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:34,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:37,487 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:37,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735324757] [2022-02-15 02:04:37,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735324757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:37,487 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:37,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-15 02:04:37,487 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213396461] [2022-02-15 02:04:37,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:37,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-15 02:04:37,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:37,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-15 02:04:37,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4970, Invalid=11542, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 02:04:37,489 INFO L87 Difference]: Start difference. First operand 373 states and 377 transitions. Second operand has 129 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 128 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:46,801 INFO L93 Difference]: Finished difference Result 587 states and 601 transitions. [2022-02-15 02:04:46,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-15 02:04:46,801 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 128 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2022-02-15 02:04:46,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:46,802 INFO L225 Difference]: With dead ends: 587 [2022-02-15 02:04:46,802 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 02:04:46,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18823 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=14904, Invalid=49866, Unknown=0, NotChecked=0, Total=64770 [2022-02-15 02:04:46,805 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 337 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13142 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 13142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:46,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 44 Invalid, 13446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 13142 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 02:04:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 02:04:46,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 222. [2022-02-15 02:04:46,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0184331797235022) internal successors, (221), 217 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2022-02-15 02:04:46,818 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 216 [2022-02-15 02:04:46,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:46,818 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2022-02-15 02:04:46,818 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 128 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:46,818 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2022-02-15 02:04:46,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-02-15 02:04:46,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:46,819 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:46,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 02:04:46,820 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:46,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:46,820 INFO L85 PathProgramCache]: Analyzing trace with hash -974059404, now seen corresponding path program 45 times [2022-02-15 02:04:46,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:46,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201938835] [2022-02-15 02:04:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:46,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:46,901 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:46,901 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:46,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:46,979 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:46,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:46,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:47,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:50,918 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:50,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201938835] [2022-02-15 02:04:50,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201938835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:50,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:50,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-15 02:04:50,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658082577] [2022-02-15 02:04:50,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:50,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-15 02:04:50,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:50,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-15 02:04:50,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5384, Invalid=12706, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 02:04:50,921 INFO L87 Difference]: Start difference. First operand 222 states and 225 transitions. Second operand has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 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) [2022-02-15 02:05:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:00,878 INFO L93 Difference]: Finished difference Result 601 states and 612 transitions. [2022-02-15 02:05:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-15 02:05:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 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 [2022-02-15 02:05:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:00,879 INFO L225 Difference]: With dead ends: 601 [2022-02-15 02:05:00,880 INFO L226 Difference]: Without dead ends: 387 [2022-02-15 02:05:00,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20480 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=15775, Invalid=53657, Unknown=0, NotChecked=0, Total=69432 [2022-02-15 02:05:00,885 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 432 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14121 mSolverCounterSat, 476 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 476 IncrementalHoareTripleChecker+Valid, 14121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:00,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 49 Invalid, 14597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [476 Valid, 14121 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 02:05:00,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-02-15 02:05:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 387. [2022-02-15 02:05:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 382 states have (on average 1.013089005235602) internal successors, (387), 382 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) [2022-02-15 02:05:00,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 391 transitions. [2022-02-15 02:05:00,902 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 391 transitions. Word has length 221 [2022-02-15 02:05:00,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:00,903 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 391 transitions. [2022-02-15 02:05:00,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 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) [2022-02-15 02:05:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 391 transitions. [2022-02-15 02:05:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-15 02:05:00,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:00,904 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:00,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 02:05:00,904 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:00,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:00,905 INFO L85 PathProgramCache]: Analyzing trace with hash 302861364, now seen corresponding path program 46 times [2022-02-15 02:05:00,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:00,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [398952819] [2022-02-15 02:05:00,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:00,944 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:00,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:00,964 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:00,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:01,040 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:01,040 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:01,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:01,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:04,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:04,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [398952819] [2022-02-15 02:05:04,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [398952819] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:04,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:04,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-15 02:05:04,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704454984] [2022-02-15 02:05:04,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:04,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-15 02:05:04,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:04,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-15 02:05:04,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5377, Invalid=12445, Unknown=0, NotChecked=0, Total=17822 [2022-02-15 02:05:04,997 INFO L87 Difference]: Start difference. First operand 387 states and 391 transitions. Second operand has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:15,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:15,072 INFO L93 Difference]: Finished difference Result 609 states and 623 transitions. [2022-02-15 02:05:15,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-15 02:05:15,073 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-02-15 02:05:15,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:15,074 INFO L225 Difference]: With dead ends: 609 [2022-02-15 02:05:15,074 INFO L226 Difference]: Without dead ends: 394 [2022-02-15 02:05:15,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20374 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=16125, Invalid=53835, Unknown=0, NotChecked=0, Total=69960 [2022-02-15 02:05:15,079 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 522 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14083 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 14654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 14083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:15,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 49 Invalid, 14654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 14083 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-15 02:05:15,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-15 02:05:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 230. [2022-02-15 02:05:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 233 transitions. [2022-02-15 02:05:15,092 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 233 transitions. Word has length 224 [2022-02-15 02:05:15,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:15,092 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 233 transitions. [2022-02-15 02:05:15,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:15,092 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 233 transitions. [2022-02-15 02:05:15,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-15 02:05:15,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:15,093 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:15,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 02:05:15,094 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash 811252005, now seen corresponding path program 47 times [2022-02-15 02:05:15,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:15,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854209123] [2022-02-15 02:05:15,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:15,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:15,168 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:15,169 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:15,187 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:15,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:15,258 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:16,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:19,546 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:19,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854209123] [2022-02-15 02:05:19,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [854209123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:19,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:19,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-15 02:05:19,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867554220] [2022-02-15 02:05:19,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:19,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-15 02:05:19,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:19,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-15 02:05:19,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5612, Invalid=13020, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:05:19,550 INFO L87 Difference]: Start difference. First operand 230 states and 233 transitions. Second operand has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 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) [2022-02-15 02:05:30,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:30,081 INFO L93 Difference]: Finished difference Result 457 states and 468 transitions. [2022-02-15 02:05:30,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-15 02:05:30,082 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 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 [2022-02-15 02:05:30,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:30,082 INFO L225 Difference]: With dead ends: 457 [2022-02-15 02:05:30,082 INFO L226 Difference]: Without dead ends: 235 [2022-02-15 02:05:30,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21310 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=16830, Invalid=56340, Unknown=0, NotChecked=0, Total=73170 [2022-02-15 02:05:30,086 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 447 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14805 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 15391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 14805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:30,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 64 Invalid, 15391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 14805 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-15 02:05:30,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-15 02:05:30,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-02-15 02:05:30,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:30,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-02-15 02:05:30,098 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 229 [2022-02-15 02:05:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:30,099 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-02-15 02:05:30,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 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) [2022-02-15 02:05:30,099 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-02-15 02:05:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-02-15 02:05:30,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:30,100 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:30,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 02:05:30,100 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:30,101 INFO L85 PathProgramCache]: Analyzing trace with hash 2042834216, now seen corresponding path program 48 times [2022-02-15 02:05:30,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:30,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687219971] [2022-02-15 02:05:30,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:30,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:30,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:30,191 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:30,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:30,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:30,250 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:30,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:30,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:34,558 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:34,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687219971] [2022-02-15 02:05:34,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687219971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:34,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:34,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-15 02:05:34,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624175818] [2022-02-15 02:05:34,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:34,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-15 02:05:34,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:34,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-15 02:05:34,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5852, Invalid=13608, Unknown=0, NotChecked=0, Total=19460 [2022-02-15 02:05:34,561 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:45,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:45,570 INFO L93 Difference]: Finished difference Result 467 states and 478 transitions. [2022-02-15 02:05:45,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-15 02:05:45,571 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-02-15 02:05:45,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:45,572 INFO L225 Difference]: With dead ends: 467 [2022-02-15 02:05:45,572 INFO L226 Difference]: Without dead ends: 240 [2022-02-15 02:05:45,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22267 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=17550, Invalid=58902, Unknown=0, NotChecked=0, Total=76452 [2022-02-15 02:05:45,575 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 366 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15443 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 15443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:45,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 39 Invalid, 15860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 15443 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-15 02:05:45,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-15 02:05:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-15 02:05:45,586 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) [2022-02-15 02:05:45,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-02-15 02:05:45,587 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 234 [2022-02-15 02:05:45,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:45,587 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-02-15 02:05:45,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:45,588 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-02-15 02:05:45,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-15 02:05:45,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:45,589 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:45,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 02:05:45,589 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:45,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:45,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1308465969, now seen corresponding path program 49 times [2022-02-15 02:05:45,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:45,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034989748] [2022-02-15 02:05:45,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:45,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,660 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,660 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:45,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:45,730 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:45,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:46,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:50,188 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:50,189 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034989748] [2022-02-15 02:05:50,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1034989748] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:50,189 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:50,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-02-15 02:05:50,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916661228] [2022-02-15 02:05:50,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:50,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-02-15 02:05:50,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:50,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-02-15 02:05:50,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6097, Invalid=14209, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 02:05:50,191 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:01,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:01,730 INFO L93 Difference]: Finished difference Result 477 states and 488 transitions. [2022-02-15 02:06:01,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-15 02:06:01,730 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-15 02:06:01,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:01,731 INFO L225 Difference]: With dead ends: 477 [2022-02-15 02:06:01,731 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 02:06:01,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23245 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=18285, Invalid=61521, Unknown=0, NotChecked=0, Total=79806 [2022-02-15 02:06:01,734 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 467 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 16204 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 16812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 16204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:01,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 59 Invalid, 16812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [608 Valid, 16204 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-15 02:06:01,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 02:06:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-02-15 02:06:01,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-02-15 02:06:01,747 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 239 [2022-02-15 02:06:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:01,747 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-02-15 02:06:01,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-02-15 02:06:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-02-15 02:06:01,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:01,749 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:01,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 02:06:01,749 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:01,750 INFO L85 PathProgramCache]: Analyzing trace with hash -124602340, now seen corresponding path program 50 times [2022-02-15 02:06:01,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:01,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115293095] [2022-02-15 02:06:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:01,798 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,826 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,826 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:01,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,882 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,882 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:01,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:02,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:02,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:06,530 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:06,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115293095] [2022-02-15 02:06:06,530 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [115293095] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:06,530 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:06,530 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-15 02:06:06,530 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9225025] [2022-02-15 02:06:06,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:06,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-15 02:06:06,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:06,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-15 02:06:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6347, Invalid=14823, Unknown=0, NotChecked=0, Total=21170 [2022-02-15 02:06:06,533 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:18,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:18,640 INFO L93 Difference]: Finished difference Result 487 states and 498 transitions. [2022-02-15 02:06:18,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-15 02:06:18,640 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-02-15 02:06:18,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:18,641 INFO L225 Difference]: With dead ends: 487 [2022-02-15 02:06:18,641 INFO L226 Difference]: Without dead ends: 250 [2022-02-15 02:06:18,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24244 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=19035, Invalid=64197, Unknown=0, NotChecked=0, Total=83232 [2022-02-15 02:06:18,644 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 476 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 16962 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 17585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 16962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:18,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [476 Valid, 44 Invalid, 17585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 16962 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-15 02:06:18,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-15 02:06:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-02-15 02:06:18,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 245 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:18,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 253 transitions. [2022-02-15 02:06:18,657 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 253 transitions. Word has length 244 [2022-02-15 02:06:18,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:18,657 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 253 transitions. [2022-02-15 02:06:18,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:18,657 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 253 transitions. [2022-02-15 02:06:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-02-15 02:06:18,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:18,658 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:18,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 02:06:18,659 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1718062275, now seen corresponding path program 51 times [2022-02-15 02:06:18,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:18,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391840464] [2022-02-15 02:06:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:18,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:18,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:18,727 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:18,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:18,792 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:18,793 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:18,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:18,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:19,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:19,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:19,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:23,621 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:23,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391840464] [2022-02-15 02:06:23,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1391840464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:23,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:23,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-15 02:06:23,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112975507] [2022-02-15 02:06:23,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:23,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-15 02:06:23,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-15 02:06:23,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6602, Invalid=15450, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:06:23,623 INFO L87 Difference]: Start difference. First operand 250 states and 253 transitions. Second operand has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 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) [2022-02-15 02:06:36,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:36,170 INFO L93 Difference]: Finished difference Result 497 states and 508 transitions. [2022-02-15 02:06:36,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-15 02:06:36,170 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 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 [2022-02-15 02:06:36,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:36,171 INFO L225 Difference]: With dead ends: 497 [2022-02-15 02:06:36,171 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 02:06:36,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25264 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=19800, Invalid=66930, Unknown=0, NotChecked=0, Total=86730 [2022-02-15 02:06:36,174 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 484 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 17692 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 18138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 17692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:36,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [484 Valid, 49 Invalid, 18138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 17692 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-15 02:06:36,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 02:06:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-02-15 02:06:36,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-02-15 02:06:36,187 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 249 [2022-02-15 02:06:36,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:36,187 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-02-15 02:06:36,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 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) [2022-02-15 02:06:36,187 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-02-15 02:06:36,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-15 02:06:36,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:36,188 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:36,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 02:06:36,188 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:36,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:36,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1095281936, now seen corresponding path program 52 times [2022-02-15 02:06:36,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:36,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280974547] [2022-02-15 02:06:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:36,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,254 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:36,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,310 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,310 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:37,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:41,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:41,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280974547] [2022-02-15 02:06:41,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [280974547] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:41,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:41,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-02-15 02:06:41,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409921402] [2022-02-15 02:06:41,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:41,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-02-15 02:06:41,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:41,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-02-15 02:06:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6862, Invalid=16090, Unknown=0, NotChecked=0, Total=22952 [2022-02-15 02:06:41,287 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:54,360 INFO L93 Difference]: Finished difference Result 507 states and 518 transitions. [2022-02-15 02:06:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-15 02:06:54,360 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-02-15 02:06:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:54,361 INFO L225 Difference]: With dead ends: 507 [2022-02-15 02:06:54,361 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 02:06:54,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26305 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=20580, Invalid=69720, Unknown=0, NotChecked=0, Total=90300 [2022-02-15 02:06:54,366 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 497 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 18384 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 497 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 19035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 18384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:54,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [497 Valid, 49 Invalid, 19035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 18384 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-15 02:06:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 02:06:54,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-02-15 02:06:54,378 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) [2022-02-15 02:06:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 263 transitions. [2022-02-15 02:06:54,379 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 263 transitions. Word has length 254 [2022-02-15 02:06:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:54,379 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 263 transitions. [2022-02-15 02:06:54,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 263 transitions. [2022-02-15 02:06:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-02-15 02:06:54,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:54,381 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:54,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 02:06:54,381 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:54,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:54,381 INFO L85 PathProgramCache]: Analyzing trace with hash -637632183, now seen corresponding path program 53 times [2022-02-15 02:06:54,381 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:54,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478589246] [2022-02-15 02:06:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:54,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,460 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:54,479 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:54,530 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:54,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:54,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:55,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:59,782 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:59,783 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478589246] [2022-02-15 02:06:59,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [478589246] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:59,783 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:59,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-02-15 02:06:59,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10859087] [2022-02-15 02:06:59,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:59,783 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-02-15 02:06:59,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:59,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-02-15 02:06:59,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7127, Invalid=16743, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 02:06:59,785 INFO L87 Difference]: Start difference. First operand 260 states and 263 transitions. Second operand has 155 states, 155 states have (on average 1.6451612903225807) internal successors, (255), 154 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:13,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:13,442 INFO L93 Difference]: Finished difference Result 517 states and 528 transitions. [2022-02-15 02:07:13,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-15 02:07:13,442 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.6451612903225807) internal successors, (255), 154 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-02-15 02:07:13,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:13,443 INFO L225 Difference]: With dead ends: 517 [2022-02-15 02:07:13,444 INFO L226 Difference]: Without dead ends: 265 [2022-02-15 02:07:13,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27367 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=21375, Invalid=72567, Unknown=0, NotChecked=0, Total=93942 [2022-02-15 02:07:13,448 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 603 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 19249 mSolverCounterSat, 764 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 20013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 764 IncrementalHoareTripleChecker+Valid, 19249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:13,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 64 Invalid, 20013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [764 Valid, 19249 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-15 02:07:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-15 02:07:13,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-02-15 02:07:13,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0153846153846153) internal successors, (264), 260 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:13,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-02-15 02:07:13,461 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 259 [2022-02-15 02:07:13,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:13,462 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-02-15 02:07:13,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.6451612903225807) internal successors, (255), 154 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:13,462 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-02-15 02:07:13,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-02-15 02:07:13,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:13,463 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:13,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 02:07:13,464 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:13,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:13,464 INFO L85 PathProgramCache]: Analyzing trace with hash 208784388, now seen corresponding path program 54 times [2022-02-15 02:07:13,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:13,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224363157] [2022-02-15 02:07:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:13,525 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,547 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:13,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:13,617 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:13,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:14,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:14,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:19,112 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:19,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224363157] [2022-02-15 02:07:19,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [224363157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:19,113 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:19,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-02-15 02:07:19,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233786715] [2022-02-15 02:07:19,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:19,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-02-15 02:07:19,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:19,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-02-15 02:07:19,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7397, Invalid=17409, Unknown=0, NotChecked=0, Total=24806 [2022-02-15 02:07:19,115 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 158 states, 158 states have (on average 1.6455696202531647) internal successors, (260), 157 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:33,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:33,208 INFO L93 Difference]: Finished difference Result 527 states and 538 transitions. [2022-02-15 02:07:33,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-02-15 02:07:33,208 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.6455696202531647) internal successors, (260), 157 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2022-02-15 02:07:33,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:33,209 INFO L225 Difference]: With dead ends: 527 [2022-02-15 02:07:33,209 INFO L226 Difference]: Without dead ends: 270 [2022-02-15 02:07:33,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28450 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=22185, Invalid=75471, Unknown=0, NotChecked=0, Total=97656 [2022-02-15 02:07:33,213 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 313 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19974 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 19974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:33,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 54 Invalid, 20444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 19974 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-02-15 02:07:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-15 02:07:33,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-02-15 02:07:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.0150943396226415) internal successors, (269), 265 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2022-02-15 02:07:33,223 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 264 [2022-02-15 02:07:33,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:33,224 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2022-02-15 02:07:33,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.6455696202531647) internal successors, (260), 157 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:33,224 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2022-02-15 02:07:33,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-15 02:07:33,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:33,225 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:33,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 02:07:33,225 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash 507708757, now seen corresponding path program 55 times [2022-02-15 02:07:33,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:33,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1676052336] [2022-02-15 02:07:33,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:33,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,294 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:33,312 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:33,364 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:33,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:34,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:38,934 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:38,934 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1676052336] [2022-02-15 02:07:38,934 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1676052336] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:38,934 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:38,934 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-02-15 02:07:38,934 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987252942] [2022-02-15 02:07:38,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:38,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-02-15 02:07:38,935 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:38,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-02-15 02:07:38,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7672, Invalid=18088, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 02:07:38,937 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 161 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 160 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) [2022-02-15 02:07:53,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:53,661 INFO L93 Difference]: Finished difference Result 537 states and 548 transitions. [2022-02-15 02:07:53,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-15 02:07:53,662 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 160 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 [2022-02-15 02:07:53,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:53,663 INFO L225 Difference]: With dead ends: 537 [2022-02-15 02:07:53,663 INFO L226 Difference]: Without dead ends: 275 [2022-02-15 02:07:53,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29554 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=23010, Invalid=78432, Unknown=0, NotChecked=0, Total=101442 [2022-02-15 02:07:53,667 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 525 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 20772 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 21255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 20772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:53,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 59 Invalid, 21255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 20772 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-15 02:07:53,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-15 02:07:53,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-02-15 02:07:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2022-02-15 02:07:53,681 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 269 [2022-02-15 02:07:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:53,681 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2022-02-15 02:07:53,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 160 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) [2022-02-15 02:07:53,681 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2022-02-15 02:07:53,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-02-15 02:07:53,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:53,683 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:53,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 02:07:53,683 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:53,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:53,683 INFO L85 PathProgramCache]: Analyzing trace with hash -61156104, now seen corresponding path program 56 times [2022-02-15 02:07:53,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:53,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759519497] [2022-02-15 02:07:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:53,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:53,758 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:53,759 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:53,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:53,828 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:53,829 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:53,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:54,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:54,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:59,579 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:59,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759519497] [2022-02-15 02:07:59,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759519497] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:59,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:59,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-02-15 02:07:59,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148294499] [2022-02-15 02:07:59,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:59,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-02-15 02:07:59,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-02-15 02:07:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7952, Invalid=18780, Unknown=0, NotChecked=0, Total=26732 [2022-02-15 02:07:59,582 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 164 states, 164 states have (on average 1.646341463414634) internal successors, (270), 163 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:14,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:14,933 INFO L93 Difference]: Finished difference Result 547 states and 558 transitions. [2022-02-15 02:08:14,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-02-15 02:08:14,934 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.646341463414634) internal successors, (270), 163 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-02-15 02:08:14,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:14,935 INFO L225 Difference]: With dead ends: 547 [2022-02-15 02:08:14,935 INFO L226 Difference]: Without dead ends: 280 [2022-02-15 02:08:14,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30679 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=23850, Invalid=81450, Unknown=0, NotChecked=0, Total=105300 [2022-02-15 02:08:14,939 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 642 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 21606 mSolverCounterSat, 810 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 642 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 22416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 810 IncrementalHoareTripleChecker+Valid, 21606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:14,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [642 Valid, 39 Invalid, 22416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [810 Valid, 21606 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 02:08:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-15 02:08:14,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-02-15 02:08:14,948 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) [2022-02-15 02:08:14,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2022-02-15 02:08:14,949 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 274 [2022-02-15 02:08:14,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:14,949 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2022-02-15 02:08:14,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.646341463414634) internal successors, (270), 163 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:14,949 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2022-02-15 02:08:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-02-15 02:08:14,950 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:14,950 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:14,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 02:08:14,951 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:14,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:14,951 INFO L85 PathProgramCache]: Analyzing trace with hash -642171039, now seen corresponding path program 57 times [2022-02-15 02:08:14,951 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:14,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [788268569] [2022-02-15 02:08:14,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:14,997 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:15,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:15,030 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:15,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:15,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:15,099 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:15,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:16,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:16,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:21,054 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:21,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [788268569] [2022-02-15 02:08:21,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [788268569] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:21,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:21,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-02-15 02:08:21,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71976850] [2022-02-15 02:08:21,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:21,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-02-15 02:08:21,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:21,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-02-15 02:08:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=19485, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 02:08:21,057 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 167 states, 167 states have (on average 1.6467065868263473) internal successors, (275), 166 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:37,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:37,033 INFO L93 Difference]: Finished difference Result 557 states and 568 transitions. [2022-02-15 02:08:37,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-15 02:08:37,033 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.6467065868263473) internal successors, (275), 166 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-02-15 02:08:37,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:37,034 INFO L225 Difference]: With dead ends: 557 [2022-02-15 02:08:37,034 INFO L226 Difference]: Without dead ends: 285 [2022-02-15 02:08:37,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31825 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=24705, Invalid=84525, Unknown=0, NotChecked=0, Total=109230 [2022-02-15 02:08:37,038 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 871 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22417 mSolverCounterSat, 1042 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 871 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 23459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1042 IncrementalHoareTripleChecker+Valid, 22417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:37,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [871 Valid, 29 Invalid, 23459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1042 Valid, 22417 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-15 02:08:37,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-15 02:08:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-02-15 02:08:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 280 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-02-15 02:08:37,048 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 279 [2022-02-15 02:08:37,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:37,048 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-02-15 02:08:37,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.6467065868263473) internal successors, (275), 166 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:37,048 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-02-15 02:08:37,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-15 02:08:37,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:37,050 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:37,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 02:08:37,050 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:37,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:37,050 INFO L85 PathProgramCache]: Analyzing trace with hash -2129623060, now seen corresponding path program 58 times [2022-02-15 02:08:37,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:37,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1130555993] [2022-02-15 02:08:37,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:37,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:37,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:37,142 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:37,165 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:37,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:37,227 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:37,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:38,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:38,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:43,585 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:43,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1130555993] [2022-02-15 02:08:43,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1130555993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:43,585 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:43,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-02-15 02:08:43,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976049068] [2022-02-15 02:08:43,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:43,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-02-15 02:08:43,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:43,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-02-15 02:08:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8527, Invalid=20203, Unknown=0, NotChecked=0, Total=28730 [2022-02-15 02:08:43,589 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 170 states, 170 states have (on average 1.6470588235294117) internal successors, (280), 169 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:00,074 INFO L93 Difference]: Finished difference Result 567 states and 578 transitions. [2022-02-15 02:09:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-15 02:09:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.6470588235294117) internal successors, (280), 169 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-02-15 02:09:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:00,075 INFO L225 Difference]: With dead ends: 567 [2022-02-15 02:09:00,075 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 02:09:00,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32992 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=25575, Invalid=87657, Unknown=0, NotChecked=0, Total=113232 [2022-02-15 02:09:00,081 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 882 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 23284 mSolverCounterSat, 733 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 24017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 733 IncrementalHoareTripleChecker+Valid, 23284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:00,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [882 Valid, 34 Invalid, 24017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [733 Valid, 23284 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 02:09:00,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 02:09:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-02-15 02:09:00,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.0140350877192983) internal successors, (289), 285 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 293 transitions. [2022-02-15 02:09:00,095 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 293 transitions. Word has length 284 [2022-02-15 02:09:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:00,096 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 293 transitions. [2022-02-15 02:09:00,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.6470588235294117) internal successors, (280), 169 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 293 transitions. [2022-02-15 02:09:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-15 02:09:00,097 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:00,097 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:00,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 02:09:00,098 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:00,098 INFO L85 PathProgramCache]: Analyzing trace with hash -757907, now seen corresponding path program 59 times [2022-02-15 02:09:00,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:00,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [86496237] [2022-02-15 02:09:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:00,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,166 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:00,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:00,241 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:00,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:01,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:01,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:01,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:06,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:06,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [86496237] [2022-02-15 02:09:06,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [86496237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:06,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:06,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-02-15 02:09:06,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725196761] [2022-02-15 02:09:06,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:06,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-02-15 02:09:06,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:06,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-02-15 02:09:06,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8822, Invalid=20934, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 02:09:06,601 INFO L87 Difference]: Start difference. First operand 290 states and 293 transitions. Second operand has 173 states, 173 states have (on average 1.6473988439306357) internal successors, (285), 172 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) [2022-02-15 02:09:23,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:23,695 INFO L93 Difference]: Finished difference Result 577 states and 588 transitions. [2022-02-15 02:09:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-15 02:09:23,695 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.6473988439306357) internal successors, (285), 172 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 [2022-02-15 02:09:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:23,696 INFO L225 Difference]: With dead ends: 577 [2022-02-15 02:09:23,697 INFO L226 Difference]: Without dead ends: 295 [2022-02-15 02:09:23,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34180 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=26460, Invalid=90846, Unknown=0, NotChecked=0, Total=117306 [2022-02-15 02:09:23,701 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 679 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 24138 mSolverCounterSat, 856 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 24994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 856 IncrementalHoareTripleChecker+Valid, 24138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:23,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 49 Invalid, 24994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [856 Valid, 24138 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2022-02-15 02:09:23,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-15 02:09:23,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-02-15 02:09:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.013793103448276) internal successors, (294), 290 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:23,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 298 transitions. [2022-02-15 02:09:23,713 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 298 transitions. Word has length 289 [2022-02-15 02:09:23,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:23,713 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 298 transitions. [2022-02-15 02:09:23,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.6473988439306357) internal successors, (285), 172 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) [2022-02-15 02:09:23,714 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 298 transitions. [2022-02-15 02:09:23,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-02-15 02:09:23,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:23,715 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:23,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 02:09:23,715 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:23,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:23,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1134582560, now seen corresponding path program 60 times [2022-02-15 02:09:23,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:23,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936650007] [2022-02-15 02:09:23,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:23,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:23,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:23,785 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:23,810 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:23,856 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:23,856 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:23,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:25,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:25,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:25,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:30,522 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:30,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936650007] [2022-02-15 02:09:30,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [936650007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:30,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:30,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-02-15 02:09:30,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42063045] [2022-02-15 02:09:30,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:30,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-02-15 02:09:30,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:30,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-02-15 02:09:30,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9122, Invalid=21678, Unknown=0, NotChecked=0, Total=30800 [2022-02-15 02:09:30,526 INFO L87 Difference]: Start difference. First operand 295 states and 298 transitions. Second operand has 176 states, 176 states have (on average 1.6477272727272727) internal successors, (290), 175 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:48,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:48,118 INFO L93 Difference]: Finished difference Result 587 states and 598 transitions. [2022-02-15 02:09:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-02-15 02:09:48,119 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.6477272727272727) internal successors, (290), 175 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-02-15 02:09:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:48,119 INFO L225 Difference]: With dead ends: 587 [2022-02-15 02:09:48,119 INFO L226 Difference]: Without dead ends: 300 [2022-02-15 02:09:48,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35389 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=27360, Invalid=94092, Unknown=0, NotChecked=0, Total=121452 [2022-02-15 02:09:48,123 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 235 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25051 mSolverCounterSat, 416 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 25467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 416 IncrementalHoareTripleChecker+Valid, 25051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:48,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 44 Invalid, 25467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [416 Valid, 25051 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-02-15 02:09:48,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-15 02:09:48,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-02-15 02:09:48,133 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) [2022-02-15 02:09:48,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2022-02-15 02:09:48,134 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 294 [2022-02-15 02:09:48,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:48,134 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2022-02-15 02:09:48,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.6477272727272727) internal successors, (290), 175 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:48,134 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2022-02-15 02:09:48,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-02-15 02:09:48,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:48,135 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:48,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 02:09:48,136 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:48,136 INFO L85 PathProgramCache]: Analyzing trace with hash 549967225, now seen corresponding path program 61 times [2022-02-15 02:09:48,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:48,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825161339] [2022-02-15 02:09:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:48,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,211 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:48,230 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:48,280 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:48,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:49,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:55,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:55,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825161339] [2022-02-15 02:09:55,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1825161339] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:55,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:55,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2022-02-15 02:09:55,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781400104] [2022-02-15 02:09:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:55,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-02-15 02:09:55,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:55,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-02-15 02:09:55,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9427, Invalid=22435, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 02:09:55,126 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 179 states, 179 states have (on average 1.6480446927374302) internal successors, (295), 178 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:13,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:13,388 INFO L93 Difference]: Finished difference Result 597 states and 608 transitions. [2022-02-15 02:10:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-02-15 02:10:13,388 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.6480446927374302) internal successors, (295), 178 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-02-15 02:10:13,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:13,389 INFO L225 Difference]: With dead ends: 597 [2022-02-15 02:10:13,389 INFO L226 Difference]: Without dead ends: 305 [2022-02-15 02:10:13,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36619 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=28275, Invalid=97395, Unknown=0, NotChecked=0, Total=125670 [2022-02-15 02:10:13,395 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 586 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25946 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 586 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 26597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 25946 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:13,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [586 Valid, 39 Invalid, 26597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 25946 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-02-15 02:10:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-15 02:10:13,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-02-15 02:10:13,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:13,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 308 transitions. [2022-02-15 02:10:13,408 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 308 transitions. Word has length 299 [2022-02-15 02:10:13,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:13,409 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 308 transitions. [2022-02-15 02:10:13,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.6480446927374302) internal successors, (295), 178 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:13,409 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 308 transitions. [2022-02-15 02:10:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-02-15 02:10:13,410 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:13,410 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:13,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 02:10:13,411 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1708452820, now seen corresponding path program 62 times [2022-02-15 02:10:13,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:13,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493157248] [2022-02-15 02:10:13,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:13,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:13,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:13,497 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:13,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:13,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:13,566 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:13,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:13,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:15,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:20,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:20,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493157248] [2022-02-15 02:10:20,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [493157248] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:20,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:20,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-02-15 02:10:20,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588226231] [2022-02-15 02:10:20,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:20,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-02-15 02:10:20,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:20,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-02-15 02:10:20,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9737, Invalid=23205, Unknown=0, NotChecked=0, Total=32942 [2022-02-15 02:10:20,707 INFO L87 Difference]: Start difference. First operand 305 states and 308 transitions. Second operand has 182 states, 182 states have (on average 1.6483516483516483) internal successors, (300), 181 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:39,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:39,561 INFO L93 Difference]: Finished difference Result 607 states and 618 transitions. [2022-02-15 02:10:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-02-15 02:10:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.6483516483516483) internal successors, (300), 181 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2022-02-15 02:10:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:39,563 INFO L225 Difference]: With dead ends: 607 [2022-02-15 02:10:39,563 INFO L226 Difference]: Without dead ends: 310 [2022-02-15 02:10:39,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37870 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=29205, Invalid=100755, Unknown=0, NotChecked=0, Total=129960 [2022-02-15 02:10:39,567 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 597 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 26905 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 27567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 26905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:39,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 49 Invalid, 27567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 26905 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-02-15 02:10:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-15 02:10:39,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-02-15 02:10:39,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 305 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:39,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 313 transitions. [2022-02-15 02:10:39,578 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 313 transitions. Word has length 304 [2022-02-15 02:10:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:39,578 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 313 transitions. [2022-02-15 02:10:39,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.6483516483516483) internal successors, (300), 181 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:39,578 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 313 transitions. [2022-02-15 02:10:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-02-15 02:10:39,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:39,579 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:39,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 02:10:39,580 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:39,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:39,580 INFO L85 PathProgramCache]: Analyzing trace with hash -2075741819, now seen corresponding path program 63 times [2022-02-15 02:10:39,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:39,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361383771] [2022-02-15 02:10:39,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:39,625 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,643 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,644 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:39,668 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,705 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:39,706 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:41,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:41,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:47,026 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:47,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361383771] [2022-02-15 02:10:47,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361383771] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:47,026 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:47,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [185] imperfect sequences [] total 185 [2022-02-15 02:10:47,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018052098] [2022-02-15 02:10:47,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:47,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2022-02-15 02:10:47,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:47,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2022-02-15 02:10:47,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10052, Invalid=23988, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 02:10:47,029 INFO L87 Difference]: Start difference. First operand 310 states and 313 transitions. Second operand has 185 states, 185 states have (on average 1.6486486486486487) internal successors, (305), 184 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) [2022-02-15 02:11:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:06,384 INFO L93 Difference]: Finished difference Result 617 states and 628 transitions. [2022-02-15 02:11:06,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-15 02:11:06,384 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.6486486486486487) internal successors, (305), 184 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 [2022-02-15 02:11:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:06,385 INFO L225 Difference]: With dead ends: 617 [2022-02-15 02:11:06,385 INFO L226 Difference]: Without dead ends: 315 [2022-02-15 02:11:06,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39142 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=30150, Invalid=104172, Unknown=0, NotChecked=0, Total=134322 [2022-02-15 02:11:06,390 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 603 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 27757 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 28551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 27757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:06,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 39 Invalid, 28551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [794 Valid, 27757 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-02-15 02:11:06,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-15 02:11:06,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2022-02-15 02:11:06,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:06,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2022-02-15 02:11:06,401 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 309 [2022-02-15 02:11:06,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:06,401 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2022-02-15 02:11:06,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.6486486486486487) internal successors, (305), 184 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) [2022-02-15 02:11:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2022-02-15 02:11:06,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-02-15 02:11:06,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:06,403 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:06,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 02:11:06,403 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:06,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:06,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1363338040, now seen corresponding path program 64 times [2022-02-15 02:11:06,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:06,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935228087] [2022-02-15 02:11:06,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:06,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:06,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:06,467 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:06,491 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:06,569 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:06,569 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:06,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:06,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:08,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:08,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:14,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:14,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935228087] [2022-02-15 02:11:14,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935228087] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:14,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:14,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [188] imperfect sequences [] total 188 [2022-02-15 02:11:14,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433602837] [2022-02-15 02:11:14,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:14,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-02-15 02:11:14,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:14,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-02-15 02:11:14,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10372, Invalid=24784, Unknown=0, NotChecked=0, Total=35156 [2022-02-15 02:11:14,059 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 188 states, 188 states have (on average 1.648936170212766) internal successors, (310), 187 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:34,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:34,254 INFO L93 Difference]: Finished difference Result 627 states and 638 transitions. [2022-02-15 02:11:34,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-02-15 02:11:34,254 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.648936170212766) internal successors, (310), 187 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2022-02-15 02:11:34,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:34,255 INFO L225 Difference]: With dead ends: 627 [2022-02-15 02:11:34,255 INFO L226 Difference]: Without dead ends: 320 [2022-02-15 02:11:34,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40435 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=31110, Invalid=107646, Unknown=0, NotChecked=0, Total=138756 [2022-02-15 02:11:34,260 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 860 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 28863 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 29915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 28863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:34,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 49 Invalid, 29915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 28863 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-02-15 02:11:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-15 02:11:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-02-15 02:11:34,272 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) [2022-02-15 02:11:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 323 transitions. [2022-02-15 02:11:34,272 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 323 transitions. Word has length 314 [2022-02-15 02:11:34,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:34,272 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 323 transitions. [2022-02-15 02:11:34,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.648936170212766) internal successors, (310), 187 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 323 transitions. [2022-02-15 02:11:34,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-02-15 02:11:34,274 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:34,274 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:34,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 02:11:34,274 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:34,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1187267473, now seen corresponding path program 65 times [2022-02-15 02:11:34,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:34,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [172518488] [2022-02-15 02:11:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:34,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:34,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:34,377 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:34,396 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:34,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:34,432 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:34,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:36,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:36,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:42,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:42,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [172518488] [2022-02-15 02:11:42,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [172518488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:42,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:42,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [191] imperfect sequences [] total 191 [2022-02-15 02:11:42,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970815587] [2022-02-15 02:11:42,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:42,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-02-15 02:11:42,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:42,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-02-15 02:11:42,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10964, Invalid=26478, Unknown=0, NotChecked=0, Total=37442 [2022-02-15 02:11:42,237 INFO L87 Difference]: Start difference. First operand 320 states and 323 transitions. Second operand has 191 states, 191 states have (on average 1.649214659685864) internal successors, (315), 190 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:03,073 INFO L93 Difference]: Finished difference Result 875 states and 886 transitions. [2022-02-15 02:12:03,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-02-15 02:12:03,073 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.649214659685864) internal successors, (315), 190 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-02-15 02:12:03,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:03,075 INFO L225 Difference]: With dead ends: 875 [2022-02-15 02:12:03,075 INFO L226 Difference]: Without dead ends: 563 [2022-02-15 02:12:03,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42858 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=32357, Invalid=113185, Unknown=0, NotChecked=0, Total=145542 [2022-02-15 02:12:03,080 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 255 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 30239 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 30558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 30239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:03,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 49 Invalid, 30558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 30239 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-02-15 02:12:03,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-15 02:12:03,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 563. [2022-02-15 02:12:03,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 558 states have (on average 1.0089605734767024) internal successors, (563), 558 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:03,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 567 transitions. [2022-02-15 02:12:03,102 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 567 transitions. Word has length 319 [2022-02-15 02:12:03,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:03,102 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 567 transitions. [2022-02-15 02:12:03,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.649214659685864) internal successors, (315), 190 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:03,103 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 567 transitions. [2022-02-15 02:12:03,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-02-15 02:12:03,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:03,104 INFO L514 BasicCegarLoop]: trace histogram [122, 121, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:03,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 02:12:03,104 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:03,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:03,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1650599049, now seen corresponding path program 66 times [2022-02-15 02:12:03,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:03,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1388817367] [2022-02-15 02:12:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:03,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,175 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:03,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:03,245 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:03,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:03,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:04,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.