/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/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 02:04:40,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 02:04:40,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 02:04:40,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 02:04:40,638 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 02:04:40,645 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 02:04:40,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 02:04:40,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 02:04:40,647 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 02:04:40,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 02:04:40,647 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 02:04:40,647 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 02:04:40,647 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 02:04:40,647 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 02:04:40,647 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 02:04:40,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 02:04:40,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:04:40,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 02:04:40,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 02:04:40,649 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 02:04:40,649 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 02:04:40,649 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 02:04:40,843 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 02:04:40,870 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 02:04:40,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 02:04:40,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 02:04:40,873 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 02:04:40,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-02-15 02:04:40,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a1e5a4e/5a7f0d8ca4b24178b1350b7517561ec3/FLAG9b6d32eaf [2022-02-15 02:04:41,247 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 02:04:41,247 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-02-15 02:04:41,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a1e5a4e/5a7f0d8ca4b24178b1350b7517561ec3/FLAG9b6d32eaf [2022-02-15 02:04:41,260 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b0a1e5a4e/5a7f0d8ca4b24178b1350b7517561ec3 [2022-02-15 02:04:41,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 02:04:41,262 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 02:04:41,263 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 02:04:41,263 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 02:04:41,265 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 02:04:41,266 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,266 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5187e98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41, skipping insertion in model container [2022-02-15 02:04:41,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 02:04:41,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 02:04:41,381 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/nested3-1.c[321,334] [2022-02-15 02:04:41,392 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:04:41,396 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 02:04:41,405 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/nested3-1.c[321,334] [2022-02-15 02:04:41,411 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 02:04:41,420 INFO L208 MainTranslator]: Completed translation [2022-02-15 02:04:41,421 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41 WrapperNode [2022-02-15 02:04:41,421 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 02:04:41,422 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 02:04:41,422 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 02:04:41,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 02:04:41,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,438 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 02:04:41,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 02:04:41,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 02:04:41,440 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 02:04:41,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (1/1) ... [2022-02-15 02:04:41,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 02:04:41,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 02:04:41,484 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 02:04:41,499 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 02:04:41,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 02:04:41,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 02:04:41,512 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 02:04:41,512 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 02:04:41,512 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 02:04:41,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 02:04:41,512 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 02:04:41,512 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 02:04:41,513 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 02:04:41,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 02:04:41,560 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 02:04:41,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 02:04:41,713 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 02:04:41,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 02:04:41,731 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-02-15 02:04:41,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:04:41 BoogieIcfgContainer [2022-02-15 02:04:41,732 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 02:04:41,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 02:04:41,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 02:04:41,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 02:04:41,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 02:04:41" (1/3) ... [2022-02-15 02:04:41,745 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b322c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:04:41, skipping insertion in model container [2022-02-15 02:04:41,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 02:04:41" (2/3) ... [2022-02-15 02:04:41,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b322c75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 02:04:41, skipping insertion in model container [2022-02-15 02:04:41,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 02:04:41" (3/3) ... [2022-02-15 02:04:41,747 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2022-02-15 02:04:41,750 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 02:04:41,750 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 02:04:41,783 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 02:04:41,788 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 02:04:41,788 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 02:04:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-15 02:04:41,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 02:04:41,815 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:41,815 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:41,816 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:41,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:41,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2022-02-15 02:04:41,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:41,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123822970] [2022-02-15 02:04:41,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:41,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:41,878 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:41,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:41,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:41,988 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:41,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123822970] [2022-02-15 02:04:41,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123822970] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:41,990 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:41,990 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 02:04:41,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510538719] [2022-02-15 02:04:41,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:41,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 02:04:41,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:42,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 02:04:42,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 02:04:42,018 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:42,083 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-02-15 02:04:42,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 02:04:42,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-15 02:04:42,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:42,089 INFO L225 Difference]: With dead ends: 44 [2022-02-15 02:04:42,089 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 02:04:42,091 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 02:04:42,093 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:42,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:04:42,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 02:04:42,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-15 02:04:42,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:42,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-02-15 02:04:42,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-02-15 02:04:42,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:42,130 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-02-15 02:04:42,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:42,132 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-02-15 02:04:42,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 02:04:42,133 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:42,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:42,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 02:04:42,134 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:42,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:42,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2022-02-15 02:04:42,135 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:42,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867254731] [2022-02-15 02:04:42,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:42,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:42,139 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,217 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 02:04:42,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:42,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867254731] [2022-02-15 02:04:42,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867254731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:42,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:42,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:04:42,219 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632390827] [2022-02-15 02:04:42,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:42,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:04:42,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:04:42,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:04:42,221 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:42,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:42,295 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-15 02:04:42,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:04:42,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-15 02:04:42,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:42,296 INFO L225 Difference]: With dead ends: 34 [2022-02-15 02:04:42,296 INFO L226 Difference]: Without dead ends: 27 [2022-02-15 02:04:42,297 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 02:04:42,298 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:42,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:42,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-15 02:04:42,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-02-15 02:04:42,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-02-15 02:04:42,304 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-02-15 02:04:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:42,304 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-02-15 02:04:42,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-02-15 02:04:42,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 02:04:42,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:42,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:42,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 02:04:42,305 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:42,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:42,305 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2022-02-15 02:04:42,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:42,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112695828] [2022-02-15 02:04:42,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:42,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:42,307 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:42,382 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:42,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112695828] [2022-02-15 02:04:42,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112695828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:42,383 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:42,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:04:42,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792171889] [2022-02-15 02:04:42,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:42,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:04:42,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:42,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:04:42,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:04:42,384 INFO L87 Difference]: Start difference. First operand 21 states and 25 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 02:04:42,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:42,439 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-15 02:04:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:04:42,439 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 02:04:42,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:42,441 INFO L225 Difference]: With dead ends: 39 [2022-02-15 02:04:42,442 INFO L226 Difference]: Without dead ends: 25 [2022-02-15 02:04:42,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:04:42,447 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:42,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:04:42,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-15 02:04:42,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-02-15 02:04:42,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-02-15 02:04:42,460 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-02-15 02:04:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:42,461 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-02-15 02:04:42,461 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 02:04:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-02-15 02:04:42,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 02:04:42,462 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:42,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:42,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 02:04:42,462 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:42,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:42,462 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2022-02-15 02:04:42,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:42,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980059961] [2022-02-15 02:04:42,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:42,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:42,465 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 02:04:42,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,534 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 02:04:42,534 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:42,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980059961] [2022-02-15 02:04:42,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980059961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:42,534 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:42,534 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 02:04:42,534 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38603108] [2022-02-15 02:04:42,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:42,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 02:04:42,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:42,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 02:04:42,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 02:04:42,536 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:42,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:42,589 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-02-15 02:04:42,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 02:04:42,590 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-15 02:04:42,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:42,592 INFO L225 Difference]: With dead ends: 39 [2022-02-15 02:04:42,592 INFO L226 Difference]: Without dead ends: 24 [2022-02-15 02:04:42,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 02:04:42,600 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:42,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:04:42,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-15 02:04:42,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-02-15 02:04:42,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:42,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-02-15 02:04:42,610 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-02-15 02:04:42,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:42,610 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-02-15 02:04:42,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:42,611 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-15 02:04:42,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 02:04:42,611 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:42,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:42,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 02:04:42,611 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:42,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2022-02-15 02:04:42,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:42,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474587387] [2022-02-15 02:04:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:42,726 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 02:04:42,727 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:42,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:42,905 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 02:04:42,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:42,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474587387] [2022-02-15 02:04:42,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474587387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:42,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:42,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:04:42,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115134725] [2022-02-15 02:04:42,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:42,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:04:42,945 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:42,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:04:42,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:04:42,946 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 02:04:43,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:43,117 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-02-15 02:04:43,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:04:43,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 02:04:43,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:43,118 INFO L225 Difference]: With dead ends: 30 [2022-02-15 02:04:43,118 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 02:04:43,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:04:43,119 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:43,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 37 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 02:04:43,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-15 02:04:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-02-15 02:04:43,136 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 14 [2022-02-15 02:04:43,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:43,139 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-02-15 02:04:43,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 6 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 02:04:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-02-15 02:04:43,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 02:04:43,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:43,140 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:43,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 02:04:43,141 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:43,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -413054462, now seen corresponding path program 1 times [2022-02-15 02:04:43,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:43,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614785232] [2022-02-15 02:04:43,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:43,210 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 02:04:43,255 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:43,256 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:43,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:43,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:43,315 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 02:04:43,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:43,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614785232] [2022-02-15 02:04:43,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1614785232] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:43,343 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:43,343 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 02:04:43,343 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458823430] [2022-02-15 02:04:43,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:43,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 02:04:43,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:43,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 02:04:43,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 02:04:43,347 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:43,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:43,410 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2022-02-15 02:04:43,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 02:04:43,411 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-15 02:04:43,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:43,411 INFO L225 Difference]: With dead ends: 53 [2022-02-15 02:04:43,411 INFO L226 Difference]: Without dead ends: 33 [2022-02-15 02:04:43,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:04:43,412 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:43,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:04:43,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-02-15 02:04:43,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2022-02-15 02:04:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2022-02-15 02:04:43,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2022-02-15 02:04:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:43,419 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2022-02-15 02:04:43,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:43,419 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2022-02-15 02:04:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 02:04:43,420 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:43,420 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:43,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 02:04:43,420 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:43,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1032496162, now seen corresponding path program 2 times [2022-02-15 02:04:43,421 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:43,421 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769895321] [2022-02-15 02:04:43,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:43,471 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 02:04:43,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:43,511 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:43,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:43,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:43,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769895321] [2022-02-15 02:04:43,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769895321] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:43,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:43,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 02:04:43,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382742312] [2022-02-15 02:04:43,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:43,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 02:04:43,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:43,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 02:04:43,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 02:04:43,589 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:43,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:43,667 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-02-15 02:04:43,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 02:04:43,667 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-02-15 02:04:43,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:43,668 INFO L225 Difference]: With dead ends: 55 [2022-02-15 02:04:43,668 INFO L226 Difference]: Without dead ends: 34 [2022-02-15 02:04:43,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:04:43,669 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:43,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 02:04:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-15 02:04:43,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-02-15 02:04:43,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:43,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-02-15 02:04:43,674 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 22 [2022-02-15 02:04:43,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:43,675 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-02-15 02:04:43,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:43,675 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-02-15 02:04:43,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 02:04:43,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:43,675 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:43,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 02:04:43,675 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:43,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:43,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1400074750, now seen corresponding path program 3 times [2022-02-15 02:04:43,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:43,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493969396] [2022-02-15 02:04:43,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:43,725 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 02:04:43,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:43,760 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:43,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:43,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:43,799 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 02:04:43,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:43,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493969396] [2022-02-15 02:04:43,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [493969396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:43,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:43,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 02:04:43,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104326017] [2022-02-15 02:04:43,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:43,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 02:04:43,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:43,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 02:04:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 02:04:43,841 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:43,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:43,936 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2022-02-15 02:04:43,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 02:04:43,937 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2022-02-15 02:04:43,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:43,937 INFO L225 Difference]: With dead ends: 57 [2022-02-15 02:04:43,937 INFO L226 Difference]: Without dead ends: 35 [2022-02-15 02:04:43,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:04:43,938 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:43,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:43,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-15 02:04:43,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-02-15 02:04:43,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:43,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-15 02:04:43,944 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2022-02-15 02:04:43,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:43,945 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-15 02:04:43,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:43,945 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-15 02:04:43,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 02:04:43,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:43,945 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 02:04:43,945 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 499638306, now seen corresponding path program 4 times [2022-02-15 02:04:43,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:43,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973620155] [2022-02-15 02:04:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:44,009 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 02:04:44,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:44,041 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:44,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:44,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,082 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 02:04:44,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:44,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973620155] [2022-02-15 02:04:44,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973620155] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:44,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:44,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 02:04:44,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601283396] [2022-02-15 02:04:44,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:44,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 02:04:44,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:44,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 02:04:44,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 02:04:44,140 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:44,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:44,286 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2022-02-15 02:04:44,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 02:04:44,287 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2022-02-15 02:04:44,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:44,287 INFO L225 Difference]: With dead ends: 59 [2022-02-15 02:04:44,287 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 02:04:44,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:04:44,289 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:44,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:44,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 02:04:44,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 31. [2022-02-15 02:04:44,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:44,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-15 02:04:44,300 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 24 [2022-02-15 02:04:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:44,300 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-15 02:04:44,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-15 02:04:44,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 02:04:44,300 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:44,300 INFO L514 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:44,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 02:04:44,300 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:44,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:44,301 INFO L85 PathProgramCache]: Analyzing trace with hash -738799102, now seen corresponding path program 5 times [2022-02-15 02:04:44,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:44,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581809030] [2022-02-15 02:04:44,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:44,349 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 02:04:44,382 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:44,382 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:44,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,418 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 02:04:44,482 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:44,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581809030] [2022-02-15 02:04:44,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [581809030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:44,483 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:44,483 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 02:04:44,483 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274013615] [2022-02-15 02:04:44,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:44,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 02:04:44,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:44,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 02:04:44,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 02:04:44,484 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:44,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:44,601 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-02-15 02:04:44,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 02:04:44,601 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2022-02-15 02:04:44,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:44,602 INFO L225 Difference]: With dead ends: 61 [2022-02-15 02:04:44,602 INFO L226 Difference]: Without dead ends: 37 [2022-02-15 02:04:44,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:04:44,603 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:44,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-15 02:04:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2022-02-15 02:04:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:44,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-02-15 02:04:44,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 25 [2022-02-15 02:04:44,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:44,609 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-02-15 02:04:44,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:44,609 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-02-15 02:04:44,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 02:04:44,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:44,610 INFO L514 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:44,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 02:04:44,610 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:44,610 INFO L85 PathProgramCache]: Analyzing trace with hash -475653086, now seen corresponding path program 6 times [2022-02-15 02:04:44,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:44,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743071177] [2022-02-15 02:04:44,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:44,653 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 02:04:44,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:44,678 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:44,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:44,714 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 02:04:44,777 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:44,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743071177] [2022-02-15 02:04:44,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743071177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:44,777 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:44,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 02:04:44,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774145089] [2022-02-15 02:04:44,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:44,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 02:04:44,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 02:04:44,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 02:04:44,779 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:44,976 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-02-15 02:04:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 02:04:44,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-02-15 02:04:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:44,977 INFO L225 Difference]: With dead ends: 63 [2022-02-15 02:04:44,977 INFO L226 Difference]: Without dead ends: 38 [2022-02-15 02:04:44,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:04:44,977 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:44,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-15 02:04:44,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2022-02-15 02:04:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-02-15 02:04:44,984 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2022-02-15 02:04:44,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:44,984 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-02-15 02:04:44,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:44,984 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-02-15 02:04:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 02:04:44,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:44,985 INFO L514 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:44,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 02:04:44,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:44,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:44,985 INFO L85 PathProgramCache]: Analyzing trace with hash -908061182, now seen corresponding path program 7 times [2022-02-15 02:04:44,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:44,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331284433] [2022-02-15 02:04:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:45,029 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 02:04:45,053 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:45,053 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:45,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:45,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:45,179 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:45,179 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331284433] [2022-02-15 02:04:45,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [331284433] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:45,179 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:45,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 02:04:45,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505508135] [2022-02-15 02:04:45,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:45,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 02:04:45,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 02:04:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 02:04:45,180 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:45,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:45,443 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2022-02-15 02:04:45,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 02:04:45,443 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-02-15 02:04:45,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:45,444 INFO L225 Difference]: With dead ends: 65 [2022-02-15 02:04:45,444 INFO L226 Difference]: Without dead ends: 39 [2022-02-15 02:04:45,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:04:45,445 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:45,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-15 02:04:45,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2022-02-15 02:04:45,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:45,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-02-15 02:04:45,451 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2022-02-15 02:04:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:45,451 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-02-15 02:04:45,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-02-15 02:04:45,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 02:04:45,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:45,452 INFO L514 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:45,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 02:04:45,452 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1427810270, now seen corresponding path program 8 times [2022-02-15 02:04:45,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:45,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406983565] [2022-02-15 02:04:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:45,497 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 02:04:45,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:45,524 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:45,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:45,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:45,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:45,545 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 02:04:45,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:45,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406983565] [2022-02-15 02:04:45,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [406983565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:45,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:45,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 02:04:45,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375317105] [2022-02-15 02:04:45,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:45,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 02:04:45,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:45,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 02:04:45,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 02:04:45,627 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:45,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:45,811 INFO L93 Difference]: Finished difference Result 67 states and 76 transitions. [2022-02-15 02:04:45,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 02:04:45,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-02-15 02:04:45,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:45,813 INFO L225 Difference]: With dead ends: 67 [2022-02-15 02:04:45,813 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 02:04:45,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:04:45,814 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:45,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:45,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 02:04:45,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2022-02-15 02:04:45,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:45,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-02-15 02:04:45,838 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2022-02-15 02:04:45,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:45,838 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-02-15 02:04:45,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:45,838 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-02-15 02:04:45,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 02:04:45,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:45,839 INFO L514 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:45,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 02:04:45,839 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash -360162814, now seen corresponding path program 9 times [2022-02-15 02:04:45,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:45,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368801593] [2022-02-15 02:04:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:45,884 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 02:04:45,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:45,909 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:45,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:45,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:45,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:45,934 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 02:04:46,035 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:46,035 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368801593] [2022-02-15 02:04:46,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368801593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:46,036 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:46,036 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 02:04:46,036 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066383536] [2022-02-15 02:04:46,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:46,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 02:04:46,036 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:46,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 02:04:46,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 02:04:46,036 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:46,258 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2022-02-15 02:04:46,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 02:04:46,258 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-02-15 02:04:46,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:46,259 INFO L225 Difference]: With dead ends: 69 [2022-02-15 02:04:46,259 INFO L226 Difference]: Without dead ends: 41 [2022-02-15 02:04:46,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:04:46,260 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:46,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:46,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-15 02:04:46,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-02-15 02:04:46,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:46,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-02-15 02:04:46,267 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2022-02-15 02:04:46,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:46,267 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-02-15 02:04:46,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:46,267 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-02-15 02:04:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 02:04:46,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:46,267 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:46,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 02:04:46,267 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:46,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830046, now seen corresponding path program 10 times [2022-02-15 02:04:46,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:46,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016202081] [2022-02-15 02:04:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:46,313 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 02:04:46,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:46,336 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:46,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:46,486 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:46,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016202081] [2022-02-15 02:04:46,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016202081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:46,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:46,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 02:04:46,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615393715] [2022-02-15 02:04:46,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:46,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 02:04:46,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:46,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 02:04:46,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 02:04:46,487 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:46,689 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2022-02-15 02:04:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 02:04:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-02-15 02:04:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:46,690 INFO L225 Difference]: With dead ends: 71 [2022-02-15 02:04:46,690 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 02:04:46,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:04:46,691 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:46,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:46,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 02:04:46,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 37. [2022-02-15 02:04:46,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:46,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-02-15 02:04:46,698 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2022-02-15 02:04:46,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:46,698 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-02-15 02:04:46,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 14 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:46,698 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-02-15 02:04:46,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 02:04:46,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:46,699 INFO L514 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:46,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 02:04:46,699 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:46,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:46,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2110808574, now seen corresponding path program 11 times [2022-02-15 02:04:46,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:46,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583435403] [2022-02-15 02:04:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:46,759 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 02:04:46,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:46,780 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:46,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:46,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:46,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:46,947 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:46,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583435403] [2022-02-15 02:04:46,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1583435403] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:46,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:46,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 02:04:46,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855796771] [2022-02-15 02:04:46,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:46,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 02:04:46,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 02:04:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-15 02:04:46,948 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:47,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:47,181 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2022-02-15 02:04:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 02:04:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-02-15 02:04:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:47,182 INFO L225 Difference]: With dead ends: 73 [2022-02-15 02:04:47,182 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 02:04:47,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:04:47,183 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:47,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 31 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 02:04:47,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2022-02-15 02:04:47,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:47,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-02-15 02:04:47,190 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2022-02-15 02:04:47,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:47,190 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-02-15 02:04:47,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:47,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-02-15 02:04:47,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 02:04:47,190 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:47,190 INFO L514 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:47,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 02:04:47,191 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:47,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:47,191 INFO L85 PathProgramCache]: Analyzing trace with hash -58273758, now seen corresponding path program 12 times [2022-02-15 02:04:47,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:47,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595217807] [2022-02-15 02:04:47,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:47,233 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 02:04:47,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:47,274 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:47,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:47,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,295 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 02:04:47,427 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:47,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595217807] [2022-02-15 02:04:47,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595217807] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:47,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:47,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 02:04:47,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341382735] [2022-02-15 02:04:47,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:47,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 02:04:47,428 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:47,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 02:04:47,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-15 02:04:47,428 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:47,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:47,721 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-02-15 02:04:47,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 02:04:47,722 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-02-15 02:04:47,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:47,722 INFO L225 Difference]: With dead ends: 75 [2022-02-15 02:04:47,722 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 02:04:47,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:04:47,723 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:47,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 355 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:47,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 02:04:47,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 39. [2022-02-15 02:04:47,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-02-15 02:04:47,730 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2022-02-15 02:04:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:47,730 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-02-15 02:04:47,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-02-15 02:04:47,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 02:04:47,731 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:47,731 INFO L514 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:47,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 02:04:47,731 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:47,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:47,731 INFO L85 PathProgramCache]: Analyzing trace with hash -854203902, now seen corresponding path program 13 times [2022-02-15 02:04:47,731 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:47,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993725537] [2022-02-15 02:04:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:47,776 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 02:04:47,816 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:47,816 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:47,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:47,844 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 02:04:47,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:47,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993725537] [2022-02-15 02:04:47,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [993725537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:47,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:47,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 02:04:47,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449901693] [2022-02-15 02:04:47,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:47,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 02:04:47,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:47,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 02:04:47,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-15 02:04:47,997 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:48,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:48,294 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2022-02-15 02:04:48,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 02:04:48,294 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-15 02:04:48,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:48,295 INFO L225 Difference]: With dead ends: 77 [2022-02-15 02:04:48,295 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 02:04:48,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:04:48,296 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:48,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 02:04:48,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 02:04:48,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-02-15 02:04:48,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-02-15 02:04:48,303 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2022-02-15 02:04:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:48,304 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-02-15 02:04:48,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:48,304 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-02-15 02:04:48,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 02:04:48,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:48,304 INFO L514 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:48,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 02:04:48,304 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash 241765410, now seen corresponding path program 14 times [2022-02-15 02:04:48,305 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:48,305 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667189117] [2022-02-15 02:04:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:48,353 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 02:04:48,376 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:48,377 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:48,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:48,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:48,399 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 02:04:48,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:48,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667189117] [2022-02-15 02:04:48,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1667189117] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:48,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:48,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 02:04:48,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255924959] [2022-02-15 02:04:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:48,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 02:04:48,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:48,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 02:04:48,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-15 02:04:48,577 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:48,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:48,944 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2022-02-15 02:04:48,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 02:04:48,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-02-15 02:04:48,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:48,945 INFO L225 Difference]: With dead ends: 79 [2022-02-15 02:04:48,945 INFO L226 Difference]: Without dead ends: 46 [2022-02-15 02:04:48,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:04:48,946 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:48,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 81 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:48,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-15 02:04:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2022-02-15 02:04:48,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-02-15 02:04:48,954 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2022-02-15 02:04:48,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:48,954 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-02-15 02:04:48,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 18 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:48,954 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-02-15 02:04:48,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 02:04:48,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:48,954 INFO L514 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:48,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 02:04:48,955 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:48,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:48,955 INFO L85 PathProgramCache]: Analyzing trace with hash -142924286, now seen corresponding path program 15 times [2022-02-15 02:04:48,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:48,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299295120] [2022-02-15 02:04:48,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:48,992 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 02:04:49,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:49,016 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:49,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:49,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:49,037 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 02:04:49,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:49,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299295120] [2022-02-15 02:04:49,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [299295120] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:49,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:49,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 02:04:49,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606728733] [2022-02-15 02:04:49,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:49,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 02:04:49,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:49,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 02:04:49,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 02:04:49,219 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:49,570 INFO L93 Difference]: Finished difference Result 81 states and 90 transitions. [2022-02-15 02:04:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 02:04:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-02-15 02:04:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:49,571 INFO L225 Difference]: With dead ends: 81 [2022-02-15 02:04:49,571 INFO L226 Difference]: Without dead ends: 47 [2022-02-15 02:04:49,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:04:49,572 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:49,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:49,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-15 02:04:49,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 42. [2022-02-15 02:04:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:49,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-02-15 02:04:49,580 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2022-02-15 02:04:49,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:49,580 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-02-15 02:04:49,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:49,580 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-02-15 02:04:49,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 02:04:49,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:49,581 INFO L514 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:49,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 02:04:49,581 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:49,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:49,581 INFO L85 PathProgramCache]: Analyzing trace with hash 816597026, now seen corresponding path program 16 times [2022-02-15 02:04:49,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:49,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1169312926] [2022-02-15 02:04:49,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:49,631 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 02:04:49,655 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:49,655 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:49,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:49,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:49,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:49,885 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:49,886 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1169312926] [2022-02-15 02:04:49,886 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1169312926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:49,886 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:49,886 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 02:04:49,886 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380549770] [2022-02-15 02:04:49,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:49,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 02:04:49,886 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:49,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 02:04:49,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-15 02:04:49,887 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:50,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:50,283 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2022-02-15 02:04:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 02:04:50,291 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-02-15 02:04:50,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:50,292 INFO L225 Difference]: With dead ends: 83 [2022-02-15 02:04:50,292 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 02:04:50,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:04:50,293 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:50,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:50,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 02:04:50,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-02-15 02:04:50,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:50,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-02-15 02:04:50,301 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2022-02-15 02:04:50,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:50,301 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-02-15 02:04:50,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 20 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:50,301 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-02-15 02:04:50,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 02:04:50,301 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:50,302 INFO L514 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:50,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:04:50,302 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:50,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:50,302 INFO L85 PathProgramCache]: Analyzing trace with hash 496986626, now seen corresponding path program 17 times [2022-02-15 02:04:50,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:50,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [245753371] [2022-02-15 02:04:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:50,340 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 02:04:50,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:50,379 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:50,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:50,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:50,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:50,424 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 02:04:50,649 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:50,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [245753371] [2022-02-15 02:04:50,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [245753371] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:50,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:50,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 02:04:50,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515406474] [2022-02-15 02:04:50,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:50,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 02:04:50,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:50,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 02:04:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-15 02:04:50,650 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:51,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:51,091 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2022-02-15 02:04:51,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 02:04:51,093 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-02-15 02:04:51,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:51,093 INFO L225 Difference]: With dead ends: 85 [2022-02-15 02:04:51,093 INFO L226 Difference]: Without dead ends: 49 [2022-02-15 02:04:51,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:04:51,094 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:51,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:51,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-15 02:04:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 44. [2022-02-15 02:04:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:51,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-02-15 02:04:51,104 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2022-02-15 02:04:51,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:51,104 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-02-15 02:04:51,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:51,104 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-02-15 02:04:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 02:04:51,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:51,106 INFO L514 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:51,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:04:51,106 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash -821001182, now seen corresponding path program 18 times [2022-02-15 02:04:51,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:51,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251410114] [2022-02-15 02:04:51,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:51,148 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 02:04:51,176 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:51,176 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:51,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:51,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:51,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:51,204 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 02:04:51,462 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:51,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251410114] [2022-02-15 02:04:51,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1251410114] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:51,462 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:51,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 02:04:51,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838703512] [2022-02-15 02:04:51,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:51,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 02:04:51,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:51,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 02:04:51,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-15 02:04:51,463 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:51,866 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2022-02-15 02:04:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 02:04:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-02-15 02:04:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:51,866 INFO L225 Difference]: With dead ends: 87 [2022-02-15 02:04:51,866 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 02:04:51,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:04:51,867 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:51,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 02:04:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2022-02-15 02:04:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:51,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-02-15 02:04:51,877 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2022-02-15 02:04:51,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:51,877 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-02-15 02:04:51,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 22 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-02-15 02:04:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 02:04:51,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:51,877 INFO L514 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:51,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:04:51,877 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:51,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:51,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1271049730, now seen corresponding path program 19 times [2022-02-15 02:04:51,878 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:51,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8615139] [2022-02-15 02:04:51,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:51,924 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 02:04:51,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:51,961 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:51,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:51,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:51,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:51,986 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 02:04:52,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:52,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8615139] [2022-02-15 02:04:52,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [8615139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:52,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:52,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 02:04:52,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604493761] [2022-02-15 02:04:52,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:52,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 02:04:52,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:52,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 02:04:52,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-15 02:04:52,260 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:52,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:52,695 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2022-02-15 02:04:52,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 02:04:52,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-02-15 02:04:52,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:52,695 INFO L225 Difference]: With dead ends: 89 [2022-02-15 02:04:52,695 INFO L226 Difference]: Without dead ends: 51 [2022-02-15 02:04:52,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:04:52,696 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:52,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:52,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-15 02:04:52,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2022-02-15 02:04:52,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:52,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-02-15 02:04:52,706 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2022-02-15 02:04:52,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:52,706 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-02-15 02:04:52,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:52,707 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-02-15 02:04:52,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 02:04:52,707 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:52,707 INFO L514 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:52,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:04:52,707 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1700118562, now seen corresponding path program 20 times [2022-02-15 02:04:52,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:52,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182009350] [2022-02-15 02:04:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:52,749 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 02:04:52,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:52,778 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:52,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:52,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:52,798 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 02:04:53,063 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:53,063 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182009350] [2022-02-15 02:04:53,063 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [182009350] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:53,063 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:53,063 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 02:04:53,063 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698328038] [2022-02-15 02:04:53,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:53,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 02:04:53,063 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:53,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 02:04:53,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 02:04:53,064 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:53,563 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2022-02-15 02:04:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 02:04:53,563 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-02-15 02:04:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:53,564 INFO L225 Difference]: With dead ends: 91 [2022-02-15 02:04:53,564 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 02:04:53,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:04:53,565 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:53,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:53,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 02:04:53,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2022-02-15 02:04:53,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:53,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-02-15 02:04:53,586 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2022-02-15 02:04:53,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:53,586 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-02-15 02:04:53,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:53,586 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-02-15 02:04:53,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 02:04:53,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:53,586 INFO L514 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:53,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:04:53,587 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:53,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash 2116350466, now seen corresponding path program 21 times [2022-02-15 02:04:53,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:53,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152022860] [2022-02-15 02:04:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:53,632 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 02:04:53,657 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:53,657 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:53,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:53,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:53,680 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 02:04:53,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:53,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152022860] [2022-02-15 02:04:53,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [152022860] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:53,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:53,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 02:04:53,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745109277] [2022-02-15 02:04:53,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:53,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 02:04:53,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:53,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 02:04:53,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-15 02:04:53,945 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:54,517 INFO L93 Difference]: Finished difference Result 93 states and 102 transitions. [2022-02-15 02:04:54,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 02:04:54,518 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-02-15 02:04:54,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:54,519 INFO L225 Difference]: With dead ends: 93 [2022-02-15 02:04:54,519 INFO L226 Difference]: Without dead ends: 53 [2022-02-15 02:04:54,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:04:54,520 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 925 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:54,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 925 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:04:54,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-15 02:04:54,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2022-02-15 02:04:54,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:54,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-02-15 02:04:54,530 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2022-02-15 02:04:54,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:54,531 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-02-15 02:04:54,531 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:54,531 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-02-15 02:04:54,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 02:04:54,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:54,531 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:54,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:04:54,531 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:54,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:54,531 INFO L85 PathProgramCache]: Analyzing trace with hash 2134637602, now seen corresponding path program 22 times [2022-02-15 02:04:54,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:54,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407071326] [2022-02-15 02:04:54,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:54,584 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 02:04:54,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:54,608 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:54,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:54,627 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 02:04:54,941 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:54,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407071326] [2022-02-15 02:04:54,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1407071326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:54,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:54,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 02:04:54,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421308028] [2022-02-15 02:04:54,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:54,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 02:04:54,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:54,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 02:04:54,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-15 02:04:54,943 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:55,461 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2022-02-15 02:04:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 02:04:55,462 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-02-15 02:04:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:55,463 INFO L225 Difference]: With dead ends: 95 [2022-02-15 02:04:55,463 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 02:04:55,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:04:55,464 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:55,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 02:04:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 02:04:55,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-02-15 02:04:55,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:55,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-02-15 02:04:55,476 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2022-02-15 02:04:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:55,476 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-02-15 02:04:55,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 26 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-02-15 02:04:55,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 02:04:55,476 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:55,476 INFO L514 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:55,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:04:55,477 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:55,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:55,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1593428478, now seen corresponding path program 23 times [2022-02-15 02:04:55,477 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:55,477 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090774477] [2022-02-15 02:04:55,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:55,513 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 02:04:55,555 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:55,556 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:55,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:55,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:55,579 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 02:04:55,892 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:55,892 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090774477] [2022-02-15 02:04:55,892 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1090774477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:55,892 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:55,892 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 02:04:55,892 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986231048] [2022-02-15 02:04:55,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:55,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 02:04:55,892 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:55,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 02:04:55,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-02-15 02:04:55,893 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:56,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:56,483 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-02-15 02:04:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 02:04:56,484 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-02-15 02:04:56,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:56,484 INFO L225 Difference]: With dead ends: 97 [2022-02-15 02:04:56,484 INFO L226 Difference]: Without dead ends: 55 [2022-02-15 02:04:56,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:04:56,485 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:56,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 802 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:04:56,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-15 02:04:56,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2022-02-15 02:04:56,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:56,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-02-15 02:04:56,497 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2022-02-15 02:04:56,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:56,497 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-02-15 02:04:56,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 27 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:56,497 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-02-15 02:04:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 02:04:56,498 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:56,498 INFO L514 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:56,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:04:56,498 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:56,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:56,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1199359966, now seen corresponding path program 24 times [2022-02-15 02:04:56,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:56,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981575832] [2022-02-15 02:04:56,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:56,563 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 02:04:56,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:56,586 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:56,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:56,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:56,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:56,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:56,618 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 02:04:56,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:56,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981575832] [2022-02-15 02:04:56,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981575832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:56,947 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:56,947 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 02:04:56,947 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514014533] [2022-02-15 02:04:56,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:56,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 02:04:56,947 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:56,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 02:04:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-02-15 02:04:56,948 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:57,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:57,581 INFO L93 Difference]: Finished difference Result 99 states and 108 transitions. [2022-02-15 02:04:57,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 02:04:57,581 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-02-15 02:04:57,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:57,582 INFO L225 Difference]: With dead ends: 99 [2022-02-15 02:04:57,582 INFO L226 Difference]: Without dead ends: 56 [2022-02-15 02:04:57,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:04:57,583 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:57,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 1003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:04:57,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-15 02:04:57,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-02-15 02:04:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:57,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-02-15 02:04:57,605 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2022-02-15 02:04:57,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:57,605 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-02-15 02:04:57,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 28 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:57,606 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-02-15 02:04:57,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 02:04:57,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:57,606 INFO L514 BasicCegarLoop]: trace histogram [25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:57,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:04:57,606 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:57,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:57,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1868137982, now seen corresponding path program 25 times [2022-02-15 02:04:57,606 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:57,606 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146844880] [2022-02-15 02:04:57,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:57,649 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 02:04:57,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:57,672 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:57,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:57,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:57,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:57,696 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 02:04:58,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:58,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146844880] [2022-02-15 02:04:58,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146844880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:58,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:58,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 02:04:58,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246123908] [2022-02-15 02:04:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:58,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 02:04:58,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:58,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 02:04:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-02-15 02:04:58,074 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:58,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:58,782 INFO L93 Difference]: Finished difference Result 101 states and 110 transitions. [2022-02-15 02:04:58,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 02:04:58,782 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-02-15 02:04:58,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:58,783 INFO L225 Difference]: With dead ends: 101 [2022-02-15 02:04:58,783 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 02:04:58,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:04:58,784 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:58,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:04:58,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 02:04:58,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2022-02-15 02:04:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:04:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-02-15 02:04:58,798 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-02-15 02:04:58,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:58,798 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-02-15 02:04:58,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 29 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:58,798 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-02-15 02:04:58,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 02:04:58,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:58,799 INFO L514 BasicCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:58,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:04:58,799 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:58,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:58,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1125419998, now seen corresponding path program 26 times [2022-02-15 02:04:58,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:58,799 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345148170] [2022-02-15 02:04:58,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:58,842 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 02:04:58,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:58,880 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:04:58,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:58,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:58,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:58,924 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 02:04:59,323 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:59,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345148170] [2022-02-15 02:04:59,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [345148170] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:59,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:59,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 02:04:59,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745500818] [2022-02-15 02:04:59,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:59,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 02:04:59,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:59,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 02:04:59,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-02-15 02:04:59,324 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:59,996 INFO L93 Difference]: Finished difference Result 103 states and 112 transitions. [2022-02-15 02:04:59,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 02:04:59,996 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-02-15 02:04:59,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:59,997 INFO L225 Difference]: With dead ends: 103 [2022-02-15 02:04:59,997 INFO L226 Difference]: Without dead ends: 58 [2022-02-15 02:04:59,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 02:04:59,998 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:59,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:04:59,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-15 02:05:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2022-02-15 02:05:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:00,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-02-15 02:05:00,013 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2022-02-15 02:05:00,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:00,013 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-02-15 02:05:00,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 30 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:00,013 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-02-15 02:05:00,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 02:05:00,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:00,015 INFO L514 BasicCegarLoop]: trace histogram [27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:00,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:05:00,015 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:00,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:00,016 INFO L85 PathProgramCache]: Analyzing trace with hash 424001026, now seen corresponding path program 27 times [2022-02-15 02:05:00,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:00,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896204150] [2022-02-15 02:05:00,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:00,053 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 02:05:00,082 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:00,082 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:00,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:00,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:00,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:00,106 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 02:05:00,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:00,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896204150] [2022-02-15 02:05:00,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [896204150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:00,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:00,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 02:05:00,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121597380] [2022-02-15 02:05:00,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:00,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 02:05:00,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:00,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 02:05:00,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-02-15 02:05:00,529 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:01,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:01,369 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2022-02-15 02:05:01,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 02:05:01,369 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-02-15 02:05:01,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:01,370 INFO L225 Difference]: With dead ends: 105 [2022-02-15 02:05:01,370 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 02:05:01,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 02:05:01,371 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:01,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 161 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1325 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:05:01,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 02:05:01,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2022-02-15 02:05:01,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:01,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-02-15 02:05:01,388 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2022-02-15 02:05:01,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:01,389 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-02-15 02:05:01,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.25) internal successors, (40), 31 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:01,389 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-02-15 02:05:01,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 02:05:01,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:01,389 INFO L514 BasicCegarLoop]: trace histogram [28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:01,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:05:01,389 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:01,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1211412514, now seen corresponding path program 28 times [2022-02-15 02:05:01,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:01,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324551599] [2022-02-15 02:05:01,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:01,428 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 02:05:01,454 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:01,455 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:01,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:01,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:01,476 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 02:05:01,914 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:01,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324551599] [2022-02-15 02:05:01,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [324551599] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:01,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:01,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 02:05:01,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662557433] [2022-02-15 02:05:01,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:01,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 02:05:01,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:01,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 02:05:01,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 02:05:01,915 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:02,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:02,714 INFO L93 Difference]: Finished difference Result 107 states and 116 transitions. [2022-02-15 02:05:02,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 02:05:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-02-15 02:05:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:02,723 INFO L225 Difference]: With dead ends: 107 [2022-02-15 02:05:02,723 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 02:05:02,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 02:05:02,724 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1288 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:02,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 126 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:05:02,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 02:05:02,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2022-02-15 02:05:02,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:02,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-02-15 02:05:02,739 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2022-02-15 02:05:02,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:02,740 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-02-15 02:05:02,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 32 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:02,740 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-02-15 02:05:02,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 02:05:02,740 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:02,740 INFO L514 BasicCegarLoop]: trace histogram [29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:02,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:05:02,740 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:02,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash -148635134, now seen corresponding path program 29 times [2022-02-15 02:05:02,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:02,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618246222] [2022-02-15 02:05:02,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:02,873 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 02:05:02,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:02,904 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:02,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:02,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:02,926 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 02:05:03,351 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:03,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618246222] [2022-02-15 02:05:03,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618246222] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:03,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:03,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 02:05:03,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010968703] [2022-02-15 02:05:03,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:03,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 02:05:03,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 02:05:03,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 02:05:03,352 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:04,131 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2022-02-15 02:05:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 02:05:04,132 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-02-15 02:05:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:04,132 INFO L225 Difference]: With dead ends: 109 [2022-02-15 02:05:04,132 INFO L226 Difference]: Without dead ends: 61 [2022-02-15 02:05:04,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:05:04,133 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:04,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 02:05:04,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-15 02:05:04,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-02-15 02:05:04,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:04,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-02-15 02:05:04,149 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2022-02-15 02:05:04,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:04,149 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-02-15 02:05:04,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:04,149 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-02-15 02:05:04,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 02:05:04,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:04,149 INFO L514 BasicCegarLoop]: trace histogram [30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:04,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:05:04,149 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:04,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:04,150 INFO L85 PathProgramCache]: Analyzing trace with hash 639560738, now seen corresponding path program 30 times [2022-02-15 02:05:04,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:04,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578319486] [2022-02-15 02:05:04,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:04,184 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 02:05:04,212 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:04,212 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:04,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:04,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:04,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:04,237 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 02:05:04,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:04,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578319486] [2022-02-15 02:05:04,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [578319486] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:04,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:04,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 02:05:04,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055534684] [2022-02-15 02:05:04,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:04,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 02:05:04,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:04,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 02:05:04,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 02:05:04,720 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:05,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:05,657 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2022-02-15 02:05:05,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 02:05:05,657 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-02-15 02:05:05,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:05,658 INFO L225 Difference]: With dead ends: 111 [2022-02-15 02:05:05,658 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 02:05:05,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:05:05,659 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 1619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:05,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 171 Invalid, 1619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1545 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:05:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 02:05:05,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2022-02-15 02:05:05,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-02-15 02:05:05,676 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2022-02-15 02:05:05,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:05,676 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-02-15 02:05:05,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 34 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:05,676 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-02-15 02:05:05,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 02:05:05,676 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:05,677 INFO L514 BasicCegarLoop]: trace histogram [31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:05,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:05:05,677 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:05,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:05,677 INFO L85 PathProgramCache]: Analyzing trace with hash -696171006, now seen corresponding path program 31 times [2022-02-15 02:05:05,677 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:05,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026491628] [2022-02-15 02:05:05,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:05,719 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 02:05:05,745 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:05,745 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:05,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:05,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:05,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:05,775 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 02:05:06,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:06,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026491628] [2022-02-15 02:05:06,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026491628] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:06,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:06,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 02:05:06,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349913045] [2022-02-15 02:05:06,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:06,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 02:05:06,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:06,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 02:05:06,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 02:05:06,327 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:07,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:07,268 INFO L93 Difference]: Finished difference Result 113 states and 122 transitions. [2022-02-15 02:05:07,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 02:05:07,268 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-02-15 02:05:07,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:07,269 INFO L225 Difference]: With dead ends: 113 [2022-02-15 02:05:07,269 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 02:05:07,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:05:07,270 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:07,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:05:07,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 02:05:07,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2022-02-15 02:05:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:07,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-02-15 02:05:07,287 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2022-02-15 02:05:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:07,287 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-02-15 02:05:07,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 35 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:07,287 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-02-15 02:05:07,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 02:05:07,288 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:07,288 INFO L514 BasicCegarLoop]: trace histogram [32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:07,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:05:07,288 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 845817890, now seen corresponding path program 32 times [2022-02-15 02:05:07,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:07,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340366689] [2022-02-15 02:05:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:07,330 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 02:05:07,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:07,367 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:07,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:07,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:07,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:07,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340366689] [2022-02-15 02:05:07,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [340366689] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:07,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:07,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 02:05:07,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982169080] [2022-02-15 02:05:07,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:07,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 02:05:07,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:07,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 02:05:07,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 02:05:07,929 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:08,854 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2022-02-15 02:05:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 02:05:08,854 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-02-15 02:05:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:08,855 INFO L225 Difference]: With dead ends: 115 [2022-02-15 02:05:08,855 INFO L226 Difference]: Without dead ends: 64 [2022-02-15 02:05:08,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:05:08,856 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:08,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 02:05:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-15 02:05:08,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2022-02-15 02:05:08,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:08,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-02-15 02:05:08,875 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2022-02-15 02:05:08,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:08,875 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-02-15 02:05:08,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 36 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:08,875 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-02-15 02:05:08,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 02:05:08,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:08,876 INFO L514 BasicCegarLoop]: trace histogram [33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:08,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:05:08,876 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:08,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:08,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1402833410, now seen corresponding path program 33 times [2022-02-15 02:05:08,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:08,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472306028] [2022-02-15 02:05:08,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:08,916 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 02:05:08,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:08,940 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:08,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:08,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:08,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:08,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:08,961 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 02:05:09,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:09,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472306028] [2022-02-15 02:05:09,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472306028] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:09,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:09,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 02:05:09,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136493358] [2022-02-15 02:05:09,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:09,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 02:05:09,587 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 02:05:09,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 02:05:09,587 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:10,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:10,672 INFO L93 Difference]: Finished difference Result 117 states and 126 transitions. [2022-02-15 02:05:10,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 02:05:10,672 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-02-15 02:05:10,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:10,673 INFO L225 Difference]: With dead ends: 117 [2022-02-15 02:05:10,673 INFO L226 Difference]: Without dead ends: 65 [2022-02-15 02:05:10,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:05:10,673 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1699 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:10,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 151 Invalid, 1779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1699 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:05:10,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-15 02:05:10,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2022-02-15 02:05:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:10,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-02-15 02:05:10,692 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2022-02-15 02:05:10,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:10,692 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-02-15 02:05:10,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:10,692 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-02-15 02:05:10,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 02:05:10,693 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:10,693 INFO L514 BasicCegarLoop]: trace histogram [34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:10,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:05:10,693 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:10,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:10,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1490445346, now seen corresponding path program 34 times [2022-02-15 02:05:10,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:10,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948308943] [2022-02-15 02:05:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:10,730 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 02:05:10,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:10,756 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:10,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:10,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:10,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:10,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:10,793 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 02:05:11,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:11,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948308943] [2022-02-15 02:05:11,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [948308943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:11,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:11,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 02:05:11,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743525649] [2022-02-15 02:05:11,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:11,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 02:05:11,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 02:05:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 02:05:11,381 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:12,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:12,493 INFO L93 Difference]: Finished difference Result 119 states and 128 transitions. [2022-02-15 02:05:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 02:05:12,493 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-02-15 02:05:12,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:12,494 INFO L225 Difference]: With dead ends: 119 [2022-02-15 02:05:12,494 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 02:05:12,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:05:12,495 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1661 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:12,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1661 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:05:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 02:05:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 61. [2022-02-15 02:05:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:12,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-02-15 02:05:12,524 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2022-02-15 02:05:12,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:12,524 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-02-15 02:05:12,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.205128205128205) internal successors, (47), 38 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-02-15 02:05:12,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 02:05:12,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:12,525 INFO L514 BasicCegarLoop]: trace histogram [35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:12,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:05:12,525 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:12,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:12,525 INFO L85 PathProgramCache]: Analyzing trace with hash -88551934, now seen corresponding path program 35 times [2022-02-15 02:05:12,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:12,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870529041] [2022-02-15 02:05:12,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:12,563 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 02:05:12,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:12,600 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:12,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:13,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:13,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870529041] [2022-02-15 02:05:13,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [870529041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:13,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:13,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 02:05:13,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752209143] [2022-02-15 02:05:13,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:13,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 02:05:13,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:13,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 02:05:13,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 02:05:13,218 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:14,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:14,380 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2022-02-15 02:05:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 02:05:14,380 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-02-15 02:05:14,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:14,381 INFO L225 Difference]: With dead ends: 121 [2022-02-15 02:05:14,381 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 02:05:14,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 02:05:14,382 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1891 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:14,382 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 166 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1891 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:05:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 02:05:14,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2022-02-15 02:05:14,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:14,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-02-15 02:05:14,402 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2022-02-15 02:05:14,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:14,402 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-02-15 02:05:14,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 39 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:14,403 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-02-15 02:05:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 02:05:14,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:14,403 INFO L514 BasicCegarLoop]: trace histogram [36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:14,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:05:14,404 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:14,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:14,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1792827358, now seen corresponding path program 36 times [2022-02-15 02:05:14,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:14,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428649600] [2022-02-15 02:05:14,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:14,441 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 02:05:14,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:14,465 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:14,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:14,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:14,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:14,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:14,505 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 02:05:15,126 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:15,127 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428649600] [2022-02-15 02:05:15,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [428649600] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:15,127 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:15,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 02:05:15,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552638573] [2022-02-15 02:05:15,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:15,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 02:05:15,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:15,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 02:05:15,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 02:05:15,128 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:16,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:16,360 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2022-02-15 02:05:16,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 02:05:16,360 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-02-15 02:05:16,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:16,360 INFO L225 Difference]: With dead ends: 123 [2022-02-15 02:05:16,361 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 02:05:16,361 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 02:05:16,361 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1969 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 2055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:16,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 166 Invalid, 2055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1969 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:05:16,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 02:05:16,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-02-15 02:05:16,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:16,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-02-15 02:05:16,383 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2022-02-15 02:05:16,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:16,384 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-02-15 02:05:16,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 40 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:16,384 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-02-15 02:05:16,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 02:05:16,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:16,384 INFO L514 BasicCegarLoop]: trace histogram [37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:16,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:05:16,384 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:16,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:16,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1209209346, now seen corresponding path program 37 times [2022-02-15 02:05:16,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:16,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627534630] [2022-02-15 02:05:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:16,432 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 02:05:16,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:16,473 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:16,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:16,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:16,501 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 02:05:17,170 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:17,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627534630] [2022-02-15 02:05:17,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [627534630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:17,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:17,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 02:05:17,171 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957156535] [2022-02-15 02:05:17,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:17,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 02:05:17,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:17,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 02:05:17,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 02:05:17,172 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:18,387 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2022-02-15 02:05:18,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 02:05:18,387 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-02-15 02:05:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:18,388 INFO L225 Difference]: With dead ends: 125 [2022-02-15 02:05:18,388 INFO L226 Difference]: Without dead ends: 69 [2022-02-15 02:05:18,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 02:05:18,389 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1895 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:18,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 1983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1895 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:05:18,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-15 02:05:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2022-02-15 02:05:18,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:18,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-02-15 02:05:18,414 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2022-02-15 02:05:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:18,414 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-02-15 02:05:18,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:18,414 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-02-15 02:05:18,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 02:05:18,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:18,415 INFO L514 BasicCegarLoop]: trace histogram [38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:18,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:05:18,415 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:18,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash -216933342, now seen corresponding path program 38 times [2022-02-15 02:05:18,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:18,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043277752] [2022-02-15 02:05:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:18,460 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 02:05:18,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:18,498 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:18,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:18,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:19,202 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:19,202 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043277752] [2022-02-15 02:05:19,202 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043277752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:19,202 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:19,202 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 02:05:19,202 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401018743] [2022-02-15 02:05:19,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:19,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 02:05:19,203 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:19,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 02:05:19,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 02:05:19,203 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:20,403 INFO L93 Difference]: Finished difference Result 127 states and 136 transitions. [2022-02-15 02:05:20,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 02:05:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-02-15 02:05:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:20,404 INFO L225 Difference]: With dead ends: 127 [2022-02-15 02:05:20,404 INFO L226 Difference]: Without dead ends: 70 [2022-02-15 02:05:20,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 02:05:20,417 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1780 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:20,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1780 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:05:20,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-15 02:05:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2022-02-15 02:05:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-02-15 02:05:20,442 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2022-02-15 02:05:20,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:20,442 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-02-15 02:05:20,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 42 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:20,442 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-02-15 02:05:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 02:05:20,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:20,443 INFO L514 BasicCegarLoop]: trace histogram [39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:20,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:05:20,443 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:20,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:20,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1477683710, now seen corresponding path program 39 times [2022-02-15 02:05:20,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:20,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280278518] [2022-02-15 02:05:20,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:20,492 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 02:05:20,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:20,519 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:20,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:20,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:21,290 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:21,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280278518] [2022-02-15 02:05:21,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [280278518] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:21,290 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:21,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 02:05:21,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621735072] [2022-02-15 02:05:21,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:21,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 02:05:21,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:21,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 02:05:21,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 02:05:21,291 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:22,645 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2022-02-15 02:05:22,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 02:05:22,645 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-02-15 02:05:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:22,645 INFO L225 Difference]: With dead ends: 129 [2022-02-15 02:05:22,645 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 02:05:22,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 02:05:22,646 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2130 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:22,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2130 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:05:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 02:05:22,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 66. [2022-02-15 02:05:22,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:22,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-02-15 02:05:22,671 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2022-02-15 02:05:22,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:22,671 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-02-15 02:05:22,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 43 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:22,671 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-02-15 02:05:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 02:05:22,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:22,671 INFO L514 BasicCegarLoop]: trace histogram [40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:22,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:05:22,671 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1906239454, now seen corresponding path program 40 times [2022-02-15 02:05:22,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:22,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243999643] [2022-02-15 02:05:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:22,715 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 02:05:22,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:22,740 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:22,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:22,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:22,760 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 02:05:23,500 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:23,500 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243999643] [2022-02-15 02:05:23,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [243999643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:23,500 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:23,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 02:05:23,500 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599472607] [2022-02-15 02:05:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:23,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 02:05:23,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 02:05:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 02:05:23,501 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:24,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:24,811 INFO L93 Difference]: Finished difference Result 131 states and 140 transitions. [2022-02-15 02:05:24,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 02:05:24,812 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-02-15 02:05:24,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:24,812 INFO L225 Difference]: With dead ends: 131 [2022-02-15 02:05:24,812 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 02:05:24,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 02:05:24,813 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1964 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 2059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:24,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 2059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1964 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:05:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 02:05:24,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2022-02-15 02:05:24,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-02-15 02:05:24,838 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2022-02-15 02:05:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:24,838 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-02-15 02:05:24,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 44 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:24,838 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-02-15 02:05:24,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 02:05:24,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:24,838 INFO L514 BasicCegarLoop]: trace histogram [41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:24,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:05:24,838 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:24,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1988401666, now seen corresponding path program 41 times [2022-02-15 02:05:24,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:24,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523998968] [2022-02-15 02:05:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:24,884 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 02:05:24,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:24,920 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:24,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:24,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:24,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:25,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:25,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523998968] [2022-02-15 02:05:25,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [523998968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:25,739 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:25,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 02:05:25,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246574050] [2022-02-15 02:05:25,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:25,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 02:05:25,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:25,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 02:05:25,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 02:05:25,740 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:27,183 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-02-15 02:05:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 02:05:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-02-15 02:05:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:27,184 INFO L225 Difference]: With dead ends: 133 [2022-02-15 02:05:27,184 INFO L226 Difference]: Without dead ends: 73 [2022-02-15 02:05:27,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 02:05:27,185 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:27,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 106 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 02:05:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-15 02:05:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 68. [2022-02-15 02:05:27,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:27,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-02-15 02:05:27,216 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2022-02-15 02:05:27,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:27,216 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-02-15 02:05:27,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 45 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:27,216 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-02-15 02:05:27,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 02:05:27,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:27,216 INFO L514 BasicCegarLoop]: trace histogram [42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:27,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 02:05:27,216 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:27,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:27,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1831775198, now seen corresponding path program 42 times [2022-02-15 02:05:27,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:27,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1743805127] [2022-02-15 02:05:27,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:27,262 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 02:05:27,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:27,287 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:27,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:27,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:27,315 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 02:05:28,172 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:28,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1743805127] [2022-02-15 02:05:28,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1743805127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:28,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:28,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 02:05:28,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393991826] [2022-02-15 02:05:28,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:28,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 02:05:28,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:28,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 02:05:28,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 02:05:28,174 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:29,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:29,704 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-02-15 02:05:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 02:05:29,705 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-02-15 02:05:29,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:29,705 INFO L225 Difference]: With dead ends: 135 [2022-02-15 02:05:29,705 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 02:05:29,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 02:05:29,706 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2465 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:29,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 161 Invalid, 2563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2465 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:05:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 02:05:29,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2022-02-15 02:05:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-02-15 02:05:29,734 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2022-02-15 02:05:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:29,734 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-02-15 02:05:29,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-02-15 02:05:29,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 02:05:29,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:29,734 INFO L514 BasicCegarLoop]: trace histogram [43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:29,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 02:05:29,734 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:29,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1826306, now seen corresponding path program 43 times [2022-02-15 02:05:29,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:29,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1906698125] [2022-02-15 02:05:29,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:29,813 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 02:05:29,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:29,842 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:29,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:29,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:29,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:29,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:30,706 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:30,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1906698125] [2022-02-15 02:05:30,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1906698125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:30,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:30,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 02:05:30,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443467843] [2022-02-15 02:05:30,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:30,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 02:05:30,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 02:05:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 02:05:30,707 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:32,330 INFO L93 Difference]: Finished difference Result 137 states and 146 transitions. [2022-02-15 02:05:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 02:05:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-02-15 02:05:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:32,331 INFO L225 Difference]: With dead ends: 137 [2022-02-15 02:05:32,331 INFO L226 Difference]: Without dead ends: 75 [2022-02-15 02:05:32,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 02:05:32,332 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2515 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:32,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 146 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2515 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:05:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-15 02:05:32,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2022-02-15 02:05:32,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:32,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-02-15 02:05:32,360 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 63 [2022-02-15 02:05:32,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:32,361 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-02-15 02:05:32,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 47 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:32,361 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-02-15 02:05:32,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 02:05:32,361 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:32,361 INFO L514 BasicCegarLoop]: trace histogram [44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:32,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 02:05:32,361 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:32,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:32,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1008898082, now seen corresponding path program 44 times [2022-02-15 02:05:32,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:32,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812316381] [2022-02-15 02:05:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:32,398 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 02:05:32,426 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:32,426 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:32,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:32,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:32,453 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 02:05:33,319 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:33,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812316381] [2022-02-15 02:05:33,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812316381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:33,319 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:33,319 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 02:05:33,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146828341] [2022-02-15 02:05:33,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:33,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 02:05:33,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:33,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 02:05:33,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 02:05:33,320 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:34,991 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2022-02-15 02:05:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 02:05:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-02-15 02:05:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:34,992 INFO L225 Difference]: With dead ends: 139 [2022-02-15 02:05:34,992 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 02:05:34,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 02:05:34,992 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2791 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:34,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2791 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:05:34,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 02:05:35,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2022-02-15 02:05:35,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:35,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-02-15 02:05:35,021 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2022-02-15 02:05:35,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:35,021 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-02-15 02:05:35,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:35,022 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-02-15 02:05:35,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 02:05:35,022 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:35,022 INFO L514 BasicCegarLoop]: trace histogram [45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:35,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 02:05:35,022 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash -2131615230, now seen corresponding path program 45 times [2022-02-15 02:05:35,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:35,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973902462] [2022-02-15 02:05:35,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:35,071 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 02:05:35,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:35,108 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:35,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:35,128 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 02:05:36,039 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:36,039 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973902462] [2022-02-15 02:05:36,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973902462] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:36,039 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:36,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 02:05:36,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118630447] [2022-02-15 02:05:36,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:36,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 02:05:36,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:36,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 02:05:36,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 02:05:36,040 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:37,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:37,696 INFO L93 Difference]: Finished difference Result 141 states and 150 transitions. [2022-02-15 02:05:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 02:05:37,697 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-02-15 02:05:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:37,697 INFO L225 Difference]: With dead ends: 141 [2022-02-15 02:05:37,697 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 02:05:37,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 02:05:37,698 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2410 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:37,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 2515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2410 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:05:37,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 02:05:37,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 72. [2022-02-15 02:05:37,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:37,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-02-15 02:05:37,728 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2022-02-15 02:05:37,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:37,729 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-02-15 02:05:37,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.16) internal successors, (58), 49 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-02-15 02:05:37,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 02:05:37,729 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:37,729 INFO L514 BasicCegarLoop]: trace histogram [46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:37,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 02:05:37,729 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:37,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash -703280094, now seen corresponding path program 46 times [2022-02-15 02:05:37,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:37,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263878553] [2022-02-15 02:05:37,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:37,765 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 02:05:37,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:37,804 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:37,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:37,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:37,832 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 02:05:38,745 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:38,745 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263878553] [2022-02-15 02:05:38,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [263878553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:38,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:38,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-15 02:05:38,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204639608] [2022-02-15 02:05:38,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:38,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-15 02:05:38,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:38,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-15 02:05:38,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 02:05:38,747 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:40,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:40,492 INFO L93 Difference]: Finished difference Result 143 states and 152 transitions. [2022-02-15 02:05:40,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 02:05:40,492 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-02-15 02:05:40,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:40,493 INFO L225 Difference]: With dead ends: 143 [2022-02-15 02:05:40,493 INFO L226 Difference]: Without dead ends: 78 [2022-02-15 02:05:40,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 02:05:40,493 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 2634 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 2741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:40,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 86 Invalid, 2741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2634 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:05:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-15 02:05:40,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2022-02-15 02:05:40,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:40,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-02-15 02:05:40,526 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2022-02-15 02:05:40,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:40,526 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-02-15 02:05:40,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1568627450980393) internal successors, (59), 50 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:40,526 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-02-15 02:05:40,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 02:05:40,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:40,527 INFO L514 BasicCegarLoop]: trace histogram [47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:40,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 02:05:40,527 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:40,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:40,527 INFO L85 PathProgramCache]: Analyzing trace with hash 625436162, now seen corresponding path program 47 times [2022-02-15 02:05:40,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:40,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479160776] [2022-02-15 02:05:40,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:40,562 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 02:05:40,591 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,591 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:40,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:40,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:40,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:40,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:40,682 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 02:05:41,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:41,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479160776] [2022-02-15 02:05:41,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479160776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:41,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:41,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 02:05:41,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988327683] [2022-02-15 02:05:41,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:41,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 02:05:41,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:41,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 02:05:41,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 02:05:41,665 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:43,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:43,429 INFO L93 Difference]: Finished difference Result 145 states and 154 transitions. [2022-02-15 02:05:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 02:05:43,430 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-02-15 02:05:43,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:43,430 INFO L225 Difference]: With dead ends: 145 [2022-02-15 02:05:43,430 INFO L226 Difference]: Without dead ends: 79 [2022-02-15 02:05:43,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 02:05:43,431 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2636 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 2745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:43,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 2745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2636 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:05:43,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-15 02:05:43,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2022-02-15 02:05:43,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:43,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-02-15 02:05:43,465 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 67 [2022-02-15 02:05:43,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:43,465 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-02-15 02:05:43,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 51 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-02-15 02:05:43,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 02:05:43,466 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:43,466 INFO L514 BasicCegarLoop]: trace histogram [48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:43,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 02:05:43,466 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:43,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:43,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1134032862, now seen corresponding path program 48 times [2022-02-15 02:05:43,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:43,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488640505] [2022-02-15 02:05:43,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:43,502 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 02:05:43,532 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:43,532 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:44,626 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:44,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488640505] [2022-02-15 02:05:44,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1488640505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:44,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:44,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 02:05:44,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103037028] [2022-02-15 02:05:44,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:44,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 02:05:44,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:44,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 02:05:44,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 02:05:44,628 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:46,449 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2022-02-15 02:05:46,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 02:05:46,459 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-02-15 02:05:46,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:46,460 INFO L225 Difference]: With dead ends: 147 [2022-02-15 02:05:46,460 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 02:05:46,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 02:05:46,461 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2710 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:46,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2710 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:05:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 02:05:46,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 75. [2022-02-15 02:05:46,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:46,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-02-15 02:05:46,499 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2022-02-15 02:05:46,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:46,499 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-02-15 02:05:46,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:46,499 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-02-15 02:05:46,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 02:05:46,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:46,500 INFO L514 BasicCegarLoop]: trace histogram [49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:46,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 02:05:46,500 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:46,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:46,500 INFO L85 PathProgramCache]: Analyzing trace with hash 157002242, now seen corresponding path program 49 times [2022-02-15 02:05:46,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:46,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145774256] [2022-02-15 02:05:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:46,536 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 02:05:46,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:46,564 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:46,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:46,589 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 02:05:47,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:47,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145774256] [2022-02-15 02:05:47,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [145774256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:47,629 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:47,629 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 02:05:47,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433447794] [2022-02-15 02:05:47,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:47,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 02:05:47,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:47,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 02:05:47,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 02:05:47,630 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:49,474 INFO L93 Difference]: Finished difference Result 149 states and 158 transitions. [2022-02-15 02:05:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 02:05:49,475 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-02-15 02:05:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:49,475 INFO L225 Difference]: With dead ends: 149 [2022-02-15 02:05:49,475 INFO L226 Difference]: Without dead ends: 81 [2022-02-15 02:05:49,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=459, Invalid=10461, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 02:05:49,476 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2814 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:49,476 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2814 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:05:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-15 02:05:49,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 76. [2022-02-15 02:05:49,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-02-15 02:05:49,513 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2022-02-15 02:05:49,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:49,514 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-02-15 02:05:49,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 53 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:49,514 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-02-15 02:05:49,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 02:05:49,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:49,514 INFO L514 BasicCegarLoop]: trace histogram [50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:49,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 02:05:49,514 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:49,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1524384802, now seen corresponding path program 50 times [2022-02-15 02:05:49,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:49,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252584453] [2022-02-15 02:05:49,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:49,557 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 02:05:49,589 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:49,589 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:49,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:49,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:49,614 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 02:05:50,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:50,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252584453] [2022-02-15 02:05:50,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1252584453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:50,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:50,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-15 02:05:50,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453919346] [2022-02-15 02:05:50,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:50,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 02:05:50,665 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 02:05:50,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 02:05:50,665 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:52,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:52,667 INFO L93 Difference]: Finished difference Result 151 states and 160 transitions. [2022-02-15 02:05:52,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 02:05:52,667 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-02-15 02:05:52,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:52,668 INFO L225 Difference]: With dead ends: 151 [2022-02-15 02:05:52,668 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 02:05:52,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=468, Invalid=10874, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 02:05:52,669 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3144 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 3259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:52,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 3259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3144 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:05:52,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 02:05:52,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2022-02-15 02:05:52,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:52,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-02-15 02:05:52,708 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2022-02-15 02:05:52,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:52,708 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-02-15 02:05:52,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 54 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:52,708 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-02-15 02:05:52,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 02:05:52,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:52,708 INFO L514 BasicCegarLoop]: trace histogram [51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:52,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 02:05:52,708 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:52,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:52,709 INFO L85 PathProgramCache]: Analyzing trace with hash 963571202, now seen corresponding path program 51 times [2022-02-15 02:05:52,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:52,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562272466] [2022-02-15 02:05:52,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:52,747 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 02:05:52,786 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:52,787 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:52,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:52,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:52,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:52,807 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 02:05:53,957 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:53,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562272466] [2022-02-15 02:05:53,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562272466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:53,957 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:53,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 02:05:53,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899035169] [2022-02-15 02:05:53,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:53,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 02:05:53,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:53,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 02:05:53,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 02:05:53,958 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:56,000 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2022-02-15 02:05:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 02:05:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-02-15 02:05:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:56,001 INFO L225 Difference]: With dead ends: 153 [2022-02-15 02:05:56,001 INFO L226 Difference]: Without dead ends: 83 [2022-02-15 02:05:56,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=477, Invalid=11295, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 02:05:56,003 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3028 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:56,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 3145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:05:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-15 02:05:56,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2022-02-15 02:05:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-02-15 02:05:56,042 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2022-02-15 02:05:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:56,042 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-02-15 02:05:56,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1428571428571428) internal successors, (64), 55 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:56,042 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-02-15 02:05:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 02:05:56,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:56,042 INFO L514 BasicCegarLoop]: trace histogram [52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:56,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 02:05:56,043 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:56,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:56,043 INFO L85 PathProgramCache]: Analyzing trace with hash 758218786, now seen corresponding path program 52 times [2022-02-15 02:05:56,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:56,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453301225] [2022-02-15 02:05:56,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:56,080 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 02:05:56,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:56,119 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:56,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:56,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:56,141 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 02:05:57,263 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:57,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453301225] [2022-02-15 02:05:57,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [453301225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:57,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:57,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-15 02:05:57,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690994661] [2022-02-15 02:05:57,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:57,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 02:05:57,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:57,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 02:05:57,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 02:05:57,265 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:59,469 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2022-02-15 02:05:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 02:05:59,469 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-02-15 02:05:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:59,469 INFO L225 Difference]: With dead ends: 155 [2022-02-15 02:05:59,469 INFO L226 Difference]: Without dead ends: 84 [2022-02-15 02:05:59,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=486, Invalid=11724, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 02:05:59,471 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3559 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 3677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:59,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 191 Invalid, 3677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3559 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:05:59,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-15 02:05:59,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 79. [2022-02-15 02:05:59,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:05:59,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-02-15 02:05:59,509 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2022-02-15 02:05:59,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:59,509 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-02-15 02:05:59,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1403508771929824) internal successors, (65), 56 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:59,509 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-02-15 02:05:59,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 02:05:59,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:59,510 INFO L514 BasicCegarLoop]: trace histogram [53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:59,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 02:05:59,510 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:59,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1312738814, now seen corresponding path program 53 times [2022-02-15 02:05:59,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:59,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920738966] [2022-02-15 02:05:59,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:59,547 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 02:05:59,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:59,583 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:05:59,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:59,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:59,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:59,607 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 02:06:00,781 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:00,781 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920738966] [2022-02-15 02:06:00,781 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920738966] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:00,781 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:00,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 02:06:00,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019406874] [2022-02-15 02:06:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:00,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 02:06:00,782 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 02:06:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 02:06:00,783 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:03,070 INFO L93 Difference]: Finished difference Result 157 states and 166 transitions. [2022-02-15 02:06:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 02:06:03,070 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-02-15 02:06:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:03,071 INFO L225 Difference]: With dead ends: 157 [2022-02-15 02:06:03,071 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 02:06:03,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=495, Invalid=12161, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 02:06:03,072 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 3777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:03,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 186 Invalid, 3777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 3656 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:06:03,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 02:06:03,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2022-02-15 02:06:03,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:03,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-02-15 02:06:03,124 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2022-02-15 02:06:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:03,124 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-02-15 02:06:03,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 57 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:03,124 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-02-15 02:06:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 02:06:03,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:03,125 INFO L514 BasicCegarLoop]: trace histogram [54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:03,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 02:06:03,125 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:03,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:03,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1087914974, now seen corresponding path program 54 times [2022-02-15 02:06:03,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:03,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1755421509] [2022-02-15 02:06:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:03,164 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 02:06:03,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:03,198 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:03,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:03,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:03,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:03,217 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 02:06:04,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:04,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1755421509] [2022-02-15 02:06:04,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1755421509] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:04,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:04,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 02:06:04,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100135361] [2022-02-15 02:06:04,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:04,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 02:06:04,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:04,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 02:06:04,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 02:06:04,438 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:06,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:06,873 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2022-02-15 02:06:06,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 02:06:06,873 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-02-15 02:06:06,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:06,873 INFO L225 Difference]: With dead ends: 159 [2022-02-15 02:06:06,873 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 02:06:06,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=504, Invalid=12606, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 02:06:06,875 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 4023 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 4145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:06,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 276 Invalid, 4145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4023 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:06:06,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 02:06:06,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 81. [2022-02-15 02:06:06,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:06,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-02-15 02:06:06,916 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2022-02-15 02:06:06,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:06,917 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-02-15 02:06:06,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:06,917 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-02-15 02:06:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 02:06:06,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:06,917 INFO L514 BasicCegarLoop]: trace histogram [55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:06,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 02:06:06,917 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:06,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:06,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1586656770, now seen corresponding path program 55 times [2022-02-15 02:06:06,917 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:06,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261580308] [2022-02-15 02:06:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:06,956 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 02:06:06,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:06,989 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:06,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:06,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:07,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:08,335 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:08,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261580308] [2022-02-15 02:06:08,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [261580308] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:08,335 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:08,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 02:06:08,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549799304] [2022-02-15 02:06:08,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:08,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 02:06:08,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:08,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 02:06:08,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 02:06:08,337 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:10,738 INFO L93 Difference]: Finished difference Result 161 states and 170 transitions. [2022-02-15 02:06:10,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 02:06:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-02-15 02:06:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:10,739 INFO L225 Difference]: With dead ends: 161 [2022-02-15 02:06:10,739 INFO L226 Difference]: Without dead ends: 87 [2022-02-15 02:06:10,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=513, Invalid=13059, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 02:06:10,740 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3943 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 4067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:10,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 4067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3943 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:06:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-15 02:06:10,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2022-02-15 02:06:10,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-02-15 02:06:10,786 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 75 [2022-02-15 02:06:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:10,786 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-02-15 02:06:10,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 59 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-02-15 02:06:10,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 02:06:10,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:10,786 INFO L514 BasicCegarLoop]: trace histogram [56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:10,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 02:06:10,786 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:10,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:10,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1400965086, now seen corresponding path program 56 times [2022-02-15 02:06:10,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:10,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815352706] [2022-02-15 02:06:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:10,821 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 02:06:10,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:10,848 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:10,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:10,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:10,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:10,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:10,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:12,181 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:12,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815352706] [2022-02-15 02:06:12,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1815352706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:12,182 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:12,182 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-15 02:06:12,182 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098183407] [2022-02-15 02:06:12,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:12,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 02:06:12,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:12,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 02:06:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 02:06:12,183 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:14,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:14,705 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2022-02-15 02:06:14,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 02:06:14,705 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-02-15 02:06:14,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:14,706 INFO L225 Difference]: With dead ends: 163 [2022-02-15 02:06:14,706 INFO L226 Difference]: Without dead ends: 88 [2022-02-15 02:06:14,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=522, Invalid=13520, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 02:06:14,707 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 4201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:14,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 211 Invalid, 4201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:06:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-15 02:06:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 83. [2022-02-15 02:06:14,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-02-15 02:06:14,758 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2022-02-15 02:06:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:14,758 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-02-15 02:06:14,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 60 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-02-15 02:06:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 02:06:14,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:14,759 INFO L514 BasicCegarLoop]: trace histogram [57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:14,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 02:06:14,759 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:14,759 INFO L85 PathProgramCache]: Analyzing trace with hash 472037890, now seen corresponding path program 57 times [2022-02-15 02:06:14,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:14,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [827049742] [2022-02-15 02:06:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:14,802 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 02:06:14,843 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:14,844 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:14,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:14,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:14,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:14,863 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 02:06:16,210 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:16,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [827049742] [2022-02-15 02:06:16,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [827049742] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:16,210 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:16,210 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 02:06:16,210 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485397023] [2022-02-15 02:06:16,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:16,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 02:06:16,210 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:16,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 02:06:16,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 02:06:16,211 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:18,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:18,775 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2022-02-15 02:06:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 02:06:18,775 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2022-02-15 02:06:18,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:18,776 INFO L225 Difference]: With dead ends: 165 [2022-02-15 02:06:18,776 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 02:06:18,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=531, Invalid=13989, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 02:06:18,777 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4167 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 4295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 4167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:18,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 4295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 4167 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:06:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 02:06:18,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2022-02-15 02:06:18,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:18,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-02-15 02:06:18,821 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 77 [2022-02-15 02:06:18,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:18,822 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-02-15 02:06:18,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 61 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:18,822 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-02-15 02:06:18,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 02:06:18,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:18,822 INFO L514 BasicCegarLoop]: trace histogram [58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:18,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 02:06:18,822 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:18,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:18,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1594411998, now seen corresponding path program 58 times [2022-02-15 02:06:18,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:18,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851877836] [2022-02-15 02:06:18,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:18,863 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 02:06:18,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:18,906 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:18,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:18,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:18,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:20,280 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:20,280 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851877836] [2022-02-15 02:06:20,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851877836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:20,280 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:20,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-15 02:06:20,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177104762] [2022-02-15 02:06:20,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:20,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-15 02:06:20,280 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-15 02:06:20,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 02:06:20,281 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:23,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:23,010 INFO L93 Difference]: Finished difference Result 167 states and 176 transitions. [2022-02-15 02:06:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 02:06:23,010 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-02-15 02:06:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:23,015 INFO L225 Difference]: With dead ends: 167 [2022-02-15 02:06:23,015 INFO L226 Difference]: Without dead ends: 90 [2022-02-15 02:06:23,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=540, Invalid=14466, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 02:06:23,017 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 4583 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 4713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:23,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 306 Invalid, 4713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4583 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:06:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-15 02:06:23,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 85. [2022-02-15 02:06:23,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:23,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-02-15 02:06:23,063 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2022-02-15 02:06:23,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:23,064 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-02-15 02:06:23,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.126984126984127) internal successors, (71), 62 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:23,064 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-02-15 02:06:23,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 02:06:23,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:23,064 INFO L514 BasicCegarLoop]: trace histogram [59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:23,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 02:06:23,064 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:23,065 INFO L85 PathProgramCache]: Analyzing trace with hash -1229849086, now seen corresponding path program 59 times [2022-02-15 02:06:23,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:23,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133102737] [2022-02-15 02:06:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:23,107 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 02:06:23,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:23,146 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:23,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:23,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:23,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:23,168 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 02:06:24,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:24,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133102737] [2022-02-15 02:06:24,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133102737] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:24,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:24,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 02:06:24,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129039386] [2022-02-15 02:06:24,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:24,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 02:06:24,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:24,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 02:06:24,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 02:06:24,598 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:27,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:27,217 INFO L93 Difference]: Finished difference Result 169 states and 178 transitions. [2022-02-15 02:06:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 02:06:27,217 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-02-15 02:06:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:27,218 INFO L225 Difference]: With dead ends: 169 [2022-02-15 02:06:27,218 INFO L226 Difference]: Without dead ends: 91 [2022-02-15 02:06:27,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=549, Invalid=14951, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 02:06:27,219 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 4181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:27,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 4181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 4048 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:06:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-15 02:06:27,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2022-02-15 02:06:27,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:27,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-02-15 02:06:27,266 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 79 [2022-02-15 02:06:27,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:27,266 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-02-15 02:06:27,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 63 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:27,266 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-02-15 02:06:27,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 02:06:27,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:27,266 INFO L514 BasicCegarLoop]: trace histogram [60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:27,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 02:06:27,266 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:27,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1481666594, now seen corresponding path program 60 times [2022-02-15 02:06:27,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:27,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025158055] [2022-02-15 02:06:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:27,304 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 02:06:27,340 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:27,340 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:27,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:27,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:27,364 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 02:06:28,833 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:28,833 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025158055] [2022-02-15 02:06:28,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025158055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:28,833 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:28,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 02:06:28,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545325601] [2022-02-15 02:06:28,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:28,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 02:06:28,834 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:28,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 02:06:28,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 02:06:28,834 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:31,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:31,456 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2022-02-15 02:06:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 02:06:31,457 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 80 [2022-02-15 02:06:31,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:31,457 INFO L225 Difference]: With dead ends: 171 [2022-02-15 02:06:31,457 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 02:06:31,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=558, Invalid=15444, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 02:06:31,458 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4090 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 4225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 4090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:31,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 4225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 4090 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:06:31,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 02:06:31,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-02-15 02:06:31,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:31,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-02-15 02:06:31,510 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2022-02-15 02:06:31,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:31,510 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-02-15 02:06:31,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.123076923076923) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-02-15 02:06:31,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 02:06:31,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:31,510 INFO L514 BasicCegarLoop]: trace histogram [61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:31,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 02:06:31,510 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:31,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:31,511 INFO L85 PathProgramCache]: Analyzing trace with hash -360693246, now seen corresponding path program 61 times [2022-02-15 02:06:31,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:31,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039440671] [2022-02-15 02:06:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:31,547 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 02:06:31,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:31,583 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:31,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:31,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:31,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:31,601 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 02:06:33,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:33,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039440671] [2022-02-15 02:06:33,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039440671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:33,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:33,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 02:06:33,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482396131] [2022-02-15 02:06:33,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:33,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 02:06:33,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:33,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 02:06:33,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 02:06:33,108 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:36,020 INFO L93 Difference]: Finished difference Result 173 states and 182 transitions. [2022-02-15 02:06:36,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 02:06:36,021 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2022-02-15 02:06:36,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:36,021 INFO L225 Difference]: With dead ends: 173 [2022-02-15 02:06:36,021 INFO L226 Difference]: Without dead ends: 93 [2022-02-15 02:06:36,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=567, Invalid=15945, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 02:06:36,026 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 4820 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 4957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 4820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:36,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 256 Invalid, 4957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 4820 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:06:36,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-15 02:06:36,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 88. [2022-02-15 02:06:36,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:36,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-02-15 02:06:36,076 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2022-02-15 02:06:36,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:36,077 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-02-15 02:06:36,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.121212121212121) internal successors, (74), 65 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:36,077 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-02-15 02:06:36,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 02:06:36,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:36,077 INFO L514 BasicCegarLoop]: trace histogram [62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:36,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 02:06:36,077 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:36,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:36,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1639273438, now seen corresponding path program 62 times [2022-02-15 02:06:36,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:36,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095229986] [2022-02-15 02:06:36,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:36,137 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 02:06:36,177 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:36,178 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:36,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:36,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:36,197 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 02:06:37,832 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:37,832 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095229986] [2022-02-15 02:06:37,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2095229986] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:37,832 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:37,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 02:06:37,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448269958] [2022-02-15 02:06:37,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:37,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 02:06:37,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:37,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 02:06:37,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:06:37,834 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:40,688 INFO L93 Difference]: Finished difference Result 175 states and 184 transitions. [2022-02-15 02:06:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 02:06:40,688 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-02-15 02:06:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:40,689 INFO L225 Difference]: With dead ends: 175 [2022-02-15 02:06:40,689 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 02:06:40,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=576, Invalid=16454, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 02:06:40,690 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4376 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 4515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 4376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:40,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 51 Invalid, 4515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 4376 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:06:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 02:06:40,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2022-02-15 02:06:40,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:40,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-02-15 02:06:40,741 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2022-02-15 02:06:40,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:40,741 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-02-15 02:06:40,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 66 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:40,742 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-02-15 02:06:40,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 02:06:40,742 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:40,742 INFO L514 BasicCegarLoop]: trace histogram [63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:40,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 02:06:40,742 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:40,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1674413570, now seen corresponding path program 63 times [2022-02-15 02:06:40,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:40,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472068709] [2022-02-15 02:06:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:40,778 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 02:06:40,819 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:40,820 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:40,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:40,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:40,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:40,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:42,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:42,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472068709] [2022-02-15 02:06:42,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [472068709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:42,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:42,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 02:06:42,428 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156340374] [2022-02-15 02:06:42,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:42,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 02:06:42,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:42,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 02:06:42,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 02:06:42,429 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:45,361 INFO L93 Difference]: Finished difference Result 177 states and 186 transitions. [2022-02-15 02:06:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 02:06:45,361 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-02-15 02:06:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:45,362 INFO L225 Difference]: With dead ends: 177 [2022-02-15 02:06:45,362 INFO L226 Difference]: Without dead ends: 95 [2022-02-15 02:06:45,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=585, Invalid=16971, Unknown=0, NotChecked=0, Total=17556 [2022-02-15 02:06:45,364 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 4550 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 4691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 4550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:45,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 4691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 4550 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:06:45,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-15 02:06:45,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-02-15 02:06:45,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-02-15 02:06:45,423 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 83 [2022-02-15 02:06:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:45,423 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-02-15 02:06:45,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1176470588235294) internal successors, (76), 67 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:45,423 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-02-15 02:06:45,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-15 02:06:45,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:45,423 INFO L514 BasicCegarLoop]: trace histogram [64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:45,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 02:06:45,423 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:45,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1319495714, now seen corresponding path program 64 times [2022-02-15 02:06:45,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:45,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842452244] [2022-02-15 02:06:45,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:45,471 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 02:06:45,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:45,508 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:45,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:45,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:45,532 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 02:06:47,217 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:47,217 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842452244] [2022-02-15 02:06:47,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [842452244] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:47,217 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:47,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-15 02:06:47,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573762509] [2022-02-15 02:06:47,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:47,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-15 02:06:47,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:47,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-15 02:06:47,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 02:06:47,218 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:50,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:50,246 INFO L93 Difference]: Finished difference Result 179 states and 188 transitions. [2022-02-15 02:06:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 02:06:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 84 [2022-02-15 02:06:50,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:50,247 INFO L225 Difference]: With dead ends: 179 [2022-02-15 02:06:50,247 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 02:06:50,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=594, Invalid=17496, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 02:06:50,248 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 4684 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 4827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:50,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 4827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 4684 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 02:06:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 02:06:50,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-02-15 02:06:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:50,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-02-15 02:06:50,307 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2022-02-15 02:06:50,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:50,307 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-02-15 02:06:50,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 68 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:50,307 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-02-15 02:06:50,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 02:06:50,307 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:50,307 INFO L514 BasicCegarLoop]: trace histogram [65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:50,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 02:06:50,307 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:50,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1093023230, now seen corresponding path program 65 times [2022-02-15 02:06:50,308 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:50,308 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646070452] [2022-02-15 02:06:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:50,349 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 02:06:50,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:50,384 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:50,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:50,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:50,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:50,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:52,142 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:52,142 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646070452] [2022-02-15 02:06:52,143 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1646070452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:52,143 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:52,143 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 02:06:52,143 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057668098] [2022-02-15 02:06:52,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:52,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 02:06:52,143 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:52,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 02:06:52,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 02:06:52,144 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:55,472 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2022-02-15 02:06:55,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 02:06:55,472 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-02-15 02:06:55,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:55,473 INFO L225 Difference]: With dead ends: 181 [2022-02-15 02:06:55,473 INFO L226 Difference]: Without dead ends: 97 [2022-02-15 02:06:55,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=603, Invalid=18029, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:06:55,474 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 5567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:55,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 5567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:06:55,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-15 02:06:55,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 92. [2022-02-15 02:06:55,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:06:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-02-15 02:06:55,533 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2022-02-15 02:06:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-02-15 02:06:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-02-15 02:06:55,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 02:06:55,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:55,534 INFO L514 BasicCegarLoop]: trace histogram [66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:55,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 02:06:55,534 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1428300834, now seen corresponding path program 66 times [2022-02-15 02:06:55,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:55,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979290801] [2022-02-15 02:06:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:55,570 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 02:06:55,615 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:55,615 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:06:55,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:55,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:55,645 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 02:06:57,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:57,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979290801] [2022-02-15 02:06:57,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [979290801] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:57,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:57,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 02:06:57,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404215929] [2022-02-15 02:06:57,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:57,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 02:06:57,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:57,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 02:06:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 02:06:57,374 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:00,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:00,685 INFO L93 Difference]: Finished difference Result 183 states and 192 transitions. [2022-02-15 02:07:00,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 02:07:00,685 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2022-02-15 02:07:00,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:00,686 INFO L225 Difference]: With dead ends: 183 [2022-02-15 02:07:00,686 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 02:07:00,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=612, Invalid=18570, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 02:07:00,687 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 5490 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 5637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:00,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 256 Invalid, 5637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5490 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:07:00,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 02:07:00,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2022-02-15 02:07:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-02-15 02:07:00,756 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2022-02-15 02:07:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:00,756 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-02-15 02:07:00,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 70 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-02-15 02:07:00,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-15 02:07:00,756 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:00,756 INFO L514 BasicCegarLoop]: trace histogram [67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:00,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 02:07:00,757 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:00,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:00,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2015031806, now seen corresponding path program 67 times [2022-02-15 02:07:00,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:00,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578611471] [2022-02-15 02:07:00,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:00,794 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 02:07:00,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:00,836 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,884 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 02:07:02,671 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:02,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578611471] [2022-02-15 02:07:02,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [578611471] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:02,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:02,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-15 02:07:02,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129738850] [2022-02-15 02:07:02,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:02,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-15 02:07:02,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:02,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-15 02:07:02,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 02:07:02,672 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:05,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:05,980 INFO L93 Difference]: Finished difference Result 185 states and 194 transitions. [2022-02-15 02:07:05,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 02:07:05,980 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2022-02-15 02:07:05,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:05,980 INFO L225 Difference]: With dead ends: 185 [2022-02-15 02:07:05,981 INFO L226 Difference]: Without dead ends: 99 [2022-02-15 02:07:05,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2346 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=621, Invalid=19119, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 02:07:05,982 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 5252 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 5401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 5252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:05,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 121 Invalid, 5401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 5252 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 02:07:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-02-15 02:07:06,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2022-02-15 02:07:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:06,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-02-15 02:07:06,045 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 87 [2022-02-15 02:07:06,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:06,045 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-02-15 02:07:06,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1111111111111112) internal successors, (80), 71 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:06,045 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-02-15 02:07:06,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 02:07:06,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:06,046 INFO L514 BasicCegarLoop]: trace histogram [68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:06,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 02:07:06,046 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:06,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:06,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1384161246, now seen corresponding path program 68 times [2022-02-15 02:07:06,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:06,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862051969] [2022-02-15 02:07:06,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:06,085 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 02:07:06,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:06,121 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:06,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:06,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:06,142 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 02:07:08,021 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:08,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862051969] [2022-02-15 02:07:08,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [862051969] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:08,021 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:08,021 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 02:07:08,021 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580242867] [2022-02-15 02:07:08,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:08,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 02:07:08,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:08,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 02:07:08,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:07:08,022 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:11,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:11,553 INFO L93 Difference]: Finished difference Result 187 states and 196 transitions. [2022-02-15 02:07:11,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 02:07:11,553 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-02-15 02:07:11,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:11,555 INFO L225 Difference]: With dead ends: 187 [2022-02-15 02:07:11,555 INFO L226 Difference]: Without dead ends: 100 [2022-02-15 02:07:11,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2415 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=630, Invalid=19676, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 02:07:11,557 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 5898 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 6049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 5898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:11,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 301 Invalid, 6049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 5898 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:07:11,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-15 02:07:11,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2022-02-15 02:07:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-02-15 02:07:11,623 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2022-02-15 02:07:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:11,623 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-02-15 02:07:11,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 72 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-02-15 02:07:11,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 02:07:11,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:11,624 INFO L514 BasicCegarLoop]: trace histogram [69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:11,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 02:07:11,624 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:11,624 INFO L85 PathProgramCache]: Analyzing trace with hash 992956930, now seen corresponding path program 69 times [2022-02-15 02:07:11,624 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:11,624 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087878680] [2022-02-15 02:07:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:11,660 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 02:07:11,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:11,700 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:11,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:13,637 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:13,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087878680] [2022-02-15 02:07:13,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087878680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:13,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:13,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 02:07:13,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114013194] [2022-02-15 02:07:13,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:13,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 02:07:13,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:13,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 02:07:13,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 02:07:13,638 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:17,202 INFO L93 Difference]: Finished difference Result 189 states and 198 transitions. [2022-02-15 02:07:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 02:07:17,202 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 89 [2022-02-15 02:07:17,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:17,203 INFO L225 Difference]: With dead ends: 189 [2022-02-15 02:07:17,203 INFO L226 Difference]: Without dead ends: 101 [2022-02-15 02:07:17,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2485 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=639, Invalid=20241, Unknown=0, NotChecked=0, Total=20880 [2022-02-15 02:07:17,204 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 5595 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 5595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:17,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 141 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 5595 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:07:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-15 02:07:17,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 96. [2022-02-15 02:07:17,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:17,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-02-15 02:07:17,267 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2022-02-15 02:07:17,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:17,267 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-02-15 02:07:17,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.1081081081081081) internal successors, (82), 73 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-02-15 02:07:17,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-15 02:07:17,268 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:17,268 INFO L514 BasicCegarLoop]: trace histogram [70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:17,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 02:07:17,268 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:17,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:17,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1669176354, now seen corresponding path program 70 times [2022-02-15 02:07:17,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:17,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791251179] [2022-02-15 02:07:17,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:17,302 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 02:07:17,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,345 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:17,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:17,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:17,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:17,365 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 02:07:19,305 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:19,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791251179] [2022-02-15 02:07:19,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [791251179] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:19,305 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:19,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-15 02:07:19,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726906365] [2022-02-15 02:07:19,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:19,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-15 02:07:19,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-15 02:07:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 02:07:19,306 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:22,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:22,941 INFO L93 Difference]: Finished difference Result 191 states and 200 transitions. [2022-02-15 02:07:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 02:07:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 90 [2022-02-15 02:07:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:22,941 INFO L225 Difference]: With dead ends: 191 [2022-02-15 02:07:22,942 INFO L226 Difference]: Without dead ends: 102 [2022-02-15 02:07:22,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=648, Invalid=20814, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 02:07:22,946 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 5713 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 5867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 5713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:22,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 131 Invalid, 5867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 5713 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:07:22,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-15 02:07:23,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 97. [2022-02-15 02:07:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-02-15 02:07:23,020 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2022-02-15 02:07:23,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:23,020 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-02-15 02:07:23,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 74 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-02-15 02:07:23,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 02:07:23,021 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:23,021 INFO L514 BasicCegarLoop]: trace histogram [71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:23,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 02:07:23,021 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:23,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:23,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1157142018, now seen corresponding path program 71 times [2022-02-15 02:07:23,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:23,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006638341] [2022-02-15 02:07:23,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:23,055 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 02:07:23,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:23,101 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:23,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:23,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:23,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:23,122 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 02:07:25,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:25,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006638341] [2022-02-15 02:07:25,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2006638341] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:25,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:25,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 02:07:25,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038385204] [2022-02-15 02:07:25,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:25,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 02:07:25,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 02:07:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 02:07:25,136 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:28,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:28,987 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2022-02-15 02:07:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 02:07:28,988 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 91 [2022-02-15 02:07:28,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:28,988 INFO L225 Difference]: With dead ends: 193 [2022-02-15 02:07:28,988 INFO L226 Difference]: Without dead ends: 103 [2022-02-15 02:07:28,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2628 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=657, Invalid=21395, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:07:28,989 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 6000 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 6157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 6000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:28,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 181 Invalid, 6157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 6000 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:07:28,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-02-15 02:07:29,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 98. [2022-02-15 02:07:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 90 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-02-15 02:07:29,063 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 91 [2022-02-15 02:07:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:29,063 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-02-15 02:07:29,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 75 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-02-15 02:07:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 02:07:29,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:29,064 INFO L514 BasicCegarLoop]: trace histogram [72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:29,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 02:07:29,064 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:29,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:29,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1831020510, now seen corresponding path program 72 times [2022-02-15 02:07:29,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:29,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534240435] [2022-02-15 02:07:29,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:29,109 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 02:07:29,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:29,152 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:29,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:29,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:29,184 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 02:07:31,263 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:31,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534240435] [2022-02-15 02:07:31,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534240435] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:31,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:31,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 02:07:31,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487895464] [2022-02-15 02:07:31,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:31,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 02:07:31,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:31,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 02:07:31,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 02:07:31,264 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:35,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:35,155 INFO L93 Difference]: Finished difference Result 195 states and 204 transitions. [2022-02-15 02:07:35,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 02:07:35,156 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-02-15 02:07:35,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:35,157 INFO L225 Difference]: With dead ends: 195 [2022-02-15 02:07:35,157 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 02:07:35,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2701 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=666, Invalid=21984, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 02:07:35,159 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 5828 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 5987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 5828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:35,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 5987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 5828 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:07:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 02:07:35,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-02-15 02:07:35,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:35,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-02-15 02:07:35,241 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2022-02-15 02:07:35,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:35,241 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-02-15 02:07:35,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.103896103896104) internal successors, (85), 76 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:35,241 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-02-15 02:07:35,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 02:07:35,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:35,241 INFO L514 BasicCegarLoop]: trace histogram [73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:35,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 02:07:35,242 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:35,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:35,242 INFO L85 PathProgramCache]: Analyzing trace with hash 25221634, now seen corresponding path program 73 times [2022-02-15 02:07:35,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:35,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437484483] [2022-02-15 02:07:35,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:35,281 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 02:07:35,323 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:35,324 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:35,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:35,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:35,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:35,346 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 02:07:37,545 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:37,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437484483] [2022-02-15 02:07:37,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437484483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:37,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:37,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-15 02:07:37,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896666207] [2022-02-15 02:07:37,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:37,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-15 02:07:37,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:37,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-15 02:07:37,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 02:07:37,546 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:41,546 INFO L93 Difference]: Finished difference Result 197 states and 206 transitions. [2022-02-15 02:07:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 02:07:41,546 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 93 [2022-02-15 02:07:41,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:41,547 INFO L225 Difference]: With dead ends: 197 [2022-02-15 02:07:41,547 INFO L226 Difference]: Without dead ends: 105 [2022-02-15 02:07:41,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2775 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=675, Invalid=22581, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 02:07:41,548 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5952 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 6113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 5952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:41,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 6113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 5952 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:07:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-15 02:07:41,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 100. [2022-02-15 02:07:41,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:41,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-02-15 02:07:41,629 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 93 [2022-02-15 02:07:41,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:41,629 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-02-15 02:07:41,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1025641025641026) internal successors, (86), 77 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:41,629 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-02-15 02:07:41,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-15 02:07:41,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:41,629 INFO L514 BasicCegarLoop]: trace histogram [74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:41,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 02:07:41,629 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:41,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:41,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1734153250, now seen corresponding path program 74 times [2022-02-15 02:07:41,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:41,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864396186] [2022-02-15 02:07:41,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:41,666 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 02:07:41,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:41,700 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:41,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:41,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:41,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:43,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:43,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864396186] [2022-02-15 02:07:43,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864396186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:43,941 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:43,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-15 02:07:43,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654712944] [2022-02-15 02:07:43,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:43,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-15 02:07:43,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:43,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-15 02:07:43,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 02:07:43,942 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:48,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:48,226 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2022-02-15 02:07:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 02:07:48,226 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-02-15 02:07:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:48,227 INFO L225 Difference]: With dead ends: 199 [2022-02-15 02:07:48,227 INFO L226 Difference]: Without dead ends: 106 [2022-02-15 02:07:48,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=684, Invalid=23186, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 02:07:48,228 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 6919 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 7081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 6919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:48,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 346 Invalid, 7081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 6919 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:07:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-15 02:07:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2022-02-15 02:07:48,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:48,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-02-15 02:07:48,303 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2022-02-15 02:07:48,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:48,303 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-02-15 02:07:48,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 78 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:48,303 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-02-15 02:07:48,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 02:07:48,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:48,303 INFO L514 BasicCegarLoop]: trace histogram [75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:48,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 02:07:48,304 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:48,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:48,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1123541502, now seen corresponding path program 75 times [2022-02-15 02:07:48,304 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:48,304 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1425794186] [2022-02-15 02:07:48,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:48,343 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 02:07:48,378 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:48,378 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:48,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:48,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:48,404 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 02:07:50,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:50,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1425794186] [2022-02-15 02:07:50,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1425794186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:50,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:50,677 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 02:07:50,677 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618346408] [2022-02-15 02:07:50,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:50,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 02:07:50,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:50,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 02:07:50,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 02:07:50,678 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:54,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:54,866 INFO L93 Difference]: Finished difference Result 201 states and 210 transitions. [2022-02-15 02:07:54,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 02:07:54,866 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 95 [2022-02-15 02:07:54,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:54,867 INFO L225 Difference]: With dead ends: 201 [2022-02-15 02:07:54,867 INFO L226 Difference]: Without dead ends: 107 [2022-02-15 02:07:54,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2926 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=693, Invalid=23799, Unknown=0, NotChecked=0, Total=24492 [2022-02-15 02:07:54,869 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6304 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 6469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 6304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:54,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 71 Invalid, 6469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 6304 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 02:07:54,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-15 02:07:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 102. [2022-02-15 02:07:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:07:54,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-02-15 02:07:54,952 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 95 [2022-02-15 02:07:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:54,952 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-02-15 02:07:54,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.1) internal successors, (88), 79 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-02-15 02:07:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 02:07:54,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:54,953 INFO L514 BasicCegarLoop]: trace histogram [76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:54,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 02:07:54,953 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:54,953 INFO L85 PathProgramCache]: Analyzing trace with hash 482234402, now seen corresponding path program 76 times [2022-02-15 02:07:54,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:54,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3109533] [2022-02-15 02:07:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:54,989 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 02:07:55,032 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:55,032 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:07:55,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:55,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:55,058 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 02:07:57,346 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:57,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3109533] [2022-02-15 02:07:57,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [3109533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:57,346 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:57,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-15 02:07:57,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752534465] [2022-02-15 02:07:57,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:57,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-15 02:07:57,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:57,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-15 02:07:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 02:07:57,347 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:01,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:01,712 INFO L93 Difference]: Finished difference Result 203 states and 212 transitions. [2022-02-15 02:08:01,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 02:08:01,713 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 96 [2022-02-15 02:08:01,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:01,713 INFO L225 Difference]: With dead ends: 203 [2022-02-15 02:08:01,713 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 02:08:01,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3003 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=702, Invalid=24420, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 02:08:01,714 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 6784 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 6951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 6784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:01,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 186 Invalid, 6951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 6784 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:08:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 02:08:01,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 103. [2022-02-15 02:08:01,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:01,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-02-15 02:08:01,799 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2022-02-15 02:08:01,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:01,799 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-02-15 02:08:01,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 80 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:01,799 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-02-15 02:08:01,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-15 02:08:01,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:01,799 INFO L514 BasicCegarLoop]: trace histogram [77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:01,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 02:08:01,800 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:01,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1278320126, now seen corresponding path program 77 times [2022-02-15 02:08:01,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:01,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [453319262] [2022-02-15 02:08:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:01,841 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 02:08:01,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:01,886 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:01,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:01,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:01,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:04,302 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:04,302 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [453319262] [2022-02-15 02:08:04,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [453319262] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:04,302 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:04,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 02:08:04,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681208535] [2022-02-15 02:08:04,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:04,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 02:08:04,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:04,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 02:08:04,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 02:08:04,303 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:08,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:08,664 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2022-02-15 02:08:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 02:08:08,665 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 97 [2022-02-15 02:08:08,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:08,665 INFO L225 Difference]: With dead ends: 205 [2022-02-15 02:08:08,665 INFO L226 Difference]: Without dead ends: 109 [2022-02-15 02:08:08,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=711, Invalid=25049, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 02:08:08,667 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 6594 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 6763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 6594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:08,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 61 Invalid, 6763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 6594 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 02:08:08,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-02-15 02:08:08,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 104. [2022-02-15 02:08:08,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-02-15 02:08:08,753 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2022-02-15 02:08:08,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:08,754 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-02-15 02:08:08,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 81 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-02-15 02:08:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-15 02:08:08,754 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:08,754 INFO L514 BasicCegarLoop]: trace histogram [78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:08,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 02:08:08,754 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -20935646, now seen corresponding path program 78 times [2022-02-15 02:08:08,755 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:08,755 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515975310] [2022-02-15 02:08:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:08,795 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 02:08:08,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:08,834 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:11,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:11,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515975310] [2022-02-15 02:08:11,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1515975310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:11,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:11,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-15 02:08:11,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650986462] [2022-02-15 02:08:11,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:11,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-15 02:08:11,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:11,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-15 02:08:11,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 02:08:11,302 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:15,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:15,981 INFO L93 Difference]: Finished difference Result 207 states and 216 transitions. [2022-02-15 02:08:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 02:08:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 98 [2022-02-15 02:08:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:15,982 INFO L225 Difference]: With dead ends: 207 [2022-02-15 02:08:15,982 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 02:08:15,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3160 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=720, Invalid=25686, Unknown=0, NotChecked=0, Total=26406 [2022-02-15 02:08:15,983 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 7541 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 7711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 7541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:15,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 341 Invalid, 7711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 7541 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 02:08:15,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 02:08:16,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2022-02-15 02:08:16,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:16,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-02-15 02:08:16,068 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2022-02-15 02:08:16,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:16,069 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-02-15 02:08:16,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0963855421686748) internal successors, (91), 82 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:16,069 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-02-15 02:08:16,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-15 02:08:16,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:16,069 INFO L514 BasicCegarLoop]: trace histogram [79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:16,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 02:08:16,069 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:16,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:16,069 INFO L85 PathProgramCache]: Analyzing trace with hash 303277570, now seen corresponding path program 79 times [2022-02-15 02:08:16,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:16,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987266203] [2022-02-15 02:08:16,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:16,118 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 02:08:16,167 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:16,167 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:16,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:16,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:16,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:18,592 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:18,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987266203] [2022-02-15 02:08:18,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1987266203] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:18,592 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:18,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-15 02:08:18,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588283464] [2022-02-15 02:08:18,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:18,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-15 02:08:18,593 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:18,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-15 02:08:18,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 02:08:18,593 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:23,229 INFO L93 Difference]: Finished difference Result 209 states and 218 transitions. [2022-02-15 02:08:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 02:08:23,230 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2022-02-15 02:08:23,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:23,230 INFO L225 Difference]: With dead ends: 209 [2022-02-15 02:08:23,230 INFO L226 Difference]: Without dead ends: 111 [2022-02-15 02:08:23,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3240 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=729, Invalid=26331, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 02:08:23,237 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6906 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 7079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:23,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 7079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6906 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:08:23,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-02-15 02:08:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2022-02-15 02:08:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:23,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-02-15 02:08:23,328 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 99 [2022-02-15 02:08:23,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:23,329 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-02-15 02:08:23,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 83 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:23,329 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-02-15 02:08:23,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-15 02:08:23,329 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:23,329 INFO L514 BasicCegarLoop]: trace histogram [80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:23,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 02:08:23,329 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:23,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1763952674, now seen corresponding path program 80 times [2022-02-15 02:08:23,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:23,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391221300] [2022-02-15 02:08:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:23,365 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 02:08:23,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:23,405 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:23,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:23,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:23,437 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 02:08:25,858 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:25,858 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391221300] [2022-02-15 02:08:25,858 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1391221300] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:25,858 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:25,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 02:08:25,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618749278] [2022-02-15 02:08:25,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:25,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 02:08:25,859 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 02:08:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 02:08:25,860 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:30,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:30,696 INFO L93 Difference]: Finished difference Result 211 states and 220 transitions. [2022-02-15 02:08:30,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 02:08:30,697 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-02-15 02:08:30,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:30,697 INFO L225 Difference]: With dead ends: 211 [2022-02-15 02:08:30,697 INFO L226 Difference]: Without dead ends: 112 [2022-02-15 02:08:30,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3321 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=738, Invalid=26984, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 02:08:30,699 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 7549 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 7723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 7549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:30,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 226 Invalid, 7723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 7549 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 02:08:30,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-15 02:08:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 107. [2022-02-15 02:08:30,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:30,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-02-15 02:08:30,789 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2022-02-15 02:08:30,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:30,789 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-02-15 02:08:30,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0941176470588236) internal successors, (93), 84 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:30,790 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-02-15 02:08:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 02:08:30,791 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:30,791 INFO L514 BasicCegarLoop]: trace histogram [81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:30,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 02:08:30,791 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:30,791 INFO L85 PathProgramCache]: Analyzing trace with hash -199759358, now seen corresponding path program 81 times [2022-02-15 02:08:30,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:30,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846826635] [2022-02-15 02:08:30,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:30,889 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 02:08:30,938 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:30,939 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:30,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:30,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:33,609 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:33,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846826635] [2022-02-15 02:08:33,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [846826635] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:33,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:33,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-15 02:08:33,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728156349] [2022-02-15 02:08:33,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:33,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-15 02:08:33,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-15 02:08:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=7059, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 02:08:33,611 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:38,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:38,356 INFO L93 Difference]: Finished difference Result 213 states and 222 transitions. [2022-02-15 02:08:38,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-15 02:08:38,357 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 101 [2022-02-15 02:08:38,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:38,357 INFO L225 Difference]: With dead ends: 213 [2022-02-15 02:08:38,357 INFO L226 Difference]: Without dead ends: 113 [2022-02-15 02:08:38,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3403 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=747, Invalid=27645, Unknown=0, NotChecked=0, Total=28392 [2022-02-15 02:08:38,360 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7184 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 7184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:38,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 36 Invalid, 7361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 7184 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:08:38,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-15 02:08:38,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 108. [2022-02-15 02:08:38,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:38,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-02-15 02:08:38,447 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2022-02-15 02:08:38,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:38,448 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-02-15 02:08:38,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 85 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:38,448 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-02-15 02:08:38,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-15 02:08:38,448 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:38,448 INFO L514 BasicCegarLoop]: trace histogram [82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:38,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 02:08:38,448 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:38,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:38,448 INFO L85 PathProgramCache]: Analyzing trace with hash -945290206, now seen corresponding path program 82 times [2022-02-15 02:08:38,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:38,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1863840139] [2022-02-15 02:08:38,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:38,483 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 02:08:38,539 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:38,540 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:38,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:38,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:38,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:38,572 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 02:08:41,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:41,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1863840139] [2022-02-15 02:08:41,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1863840139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:41,234 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:41,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-15 02:08:41,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834595087] [2022-02-15 02:08:41,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:41,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-15 02:08:41,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-15 02:08:41,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=7228, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 02:08:41,235 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:46,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:46,088 INFO L93 Difference]: Finished difference Result 215 states and 224 transitions. [2022-02-15 02:08:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 02:08:46,089 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2022-02-15 02:08:46,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:46,089 INFO L225 Difference]: With dead ends: 215 [2022-02-15 02:08:46,089 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 02:08:46,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3486 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=756, Invalid=28314, Unknown=0, NotChecked=0, Total=29070 [2022-02-15 02:08:46,091 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 7410 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 7589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 7410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:46,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 56 Invalid, 7589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 7410 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:08:46,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 02:08:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 109. [2022-02-15 02:08:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 1.04) internal successors, (104), 101 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:46,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-02-15 02:08:46,177 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2022-02-15 02:08:46,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:46,177 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-02-15 02:08:46,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0919540229885059) internal successors, (95), 86 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:46,177 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-02-15 02:08:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-15 02:08:46,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:46,177 INFO L514 BasicCegarLoop]: trace histogram [83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:46,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 02:08:46,178 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:46,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1713057282, now seen corresponding path program 83 times [2022-02-15 02:08:46,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:46,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037131432] [2022-02-15 02:08:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:46,216 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 02:08:46,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:46,266 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:46,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:46,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:46,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:49,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:49,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037131432] [2022-02-15 02:08:49,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2037131432] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:49,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:49,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 02:08:49,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686508213] [2022-02-15 02:08:49,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:49,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 02:08:49,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:49,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 02:08:49,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=7399, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 02:08:49,077 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:54,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:54,175 INFO L93 Difference]: Finished difference Result 217 states and 226 transitions. [2022-02-15 02:08:54,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 02:08:54,175 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 103 [2022-02-15 02:08:54,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:54,175 INFO L225 Difference]: With dead ends: 217 [2022-02-15 02:08:54,176 INFO L226 Difference]: Without dead ends: 115 [2022-02-15 02:08:54,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3570 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=765, Invalid=28991, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 02:08:54,177 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 7835 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 8015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 7835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:54,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 146 Invalid, 8015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 7835 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:08:54,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-15 02:08:54,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2022-02-15 02:08:54,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:08:54,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-02-15 02:08:54,276 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 103 [2022-02-15 02:08:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:54,276 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-02-15 02:08:54,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 87 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:54,276 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-02-15 02:08:54,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-15 02:08:54,277 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:54,277 INFO L514 BasicCegarLoop]: trace histogram [84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:54,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 02:08:54,277 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:54,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:54,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1777516510, now seen corresponding path program 84 times [2022-02-15 02:08:54,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:54,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892595953] [2022-02-15 02:08:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:54,317 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 02:08:54,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:54,358 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:08:54,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:54,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:54,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:54,378 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 02:08:57,147 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:57,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892595953] [2022-02-15 02:08:57,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [892595953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:57,148 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:57,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-15 02:08:57,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814524087] [2022-02-15 02:08:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:57,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-15 02:08:57,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:57,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-15 02:08:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=7572, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 02:08:57,149 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:02,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:02,534 INFO L93 Difference]: Finished difference Result 219 states and 228 transitions. [2022-02-15 02:09:02,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 02:09:02,535 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 104 [2022-02-15 02:09:02,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:02,535 INFO L225 Difference]: With dead ends: 219 [2022-02-15 02:09:02,535 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 02:09:02,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3655 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=774, Invalid=29676, Unknown=0, NotChecked=0, Total=30450 [2022-02-15 02:09:02,537 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 8555 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 8737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 8555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:02,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 341 Invalid, 8737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 8555 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 02:09:02,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 02:09:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 111. [2022-02-15 02:09:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:09:02,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-02-15 02:09:02,631 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2022-02-15 02:09:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:02,631 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-02-15 02:09:02,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0898876404494382) internal successors, (97), 88 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-02-15 02:09:02,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-15 02:09:02,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:02,631 INFO L514 BasicCegarLoop]: trace histogram [85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:02,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 02:09:02,632 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:02,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1683845634, now seen corresponding path program 85 times [2022-02-15 02:09:02,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:02,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910820658] [2022-02-15 02:09:02,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:02,677 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 02:09:02,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:02,724 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:02,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:02,758 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 02:09:05,485 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:05,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910820658] [2022-02-15 02:09:05,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [910820658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:05,485 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:05,485 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-15 02:09:05,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277384972] [2022-02-15 02:09:05,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:05,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-15 02:09:05,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:05,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-15 02:09:05,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7747, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 02:09:05,486 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:10,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:10,852 INFO L93 Difference]: Finished difference Result 221 states and 230 transitions. [2022-02-15 02:09:10,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-15 02:09:10,853 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 105 [2022-02-15 02:09:10,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:10,853 INFO L225 Difference]: With dead ends: 221 [2022-02-15 02:09:10,854 INFO L226 Difference]: Without dead ends: 117 [2022-02-15 02:09:10,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3741 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=783, Invalid=30369, Unknown=0, NotChecked=0, Total=31152 [2022-02-15 02:09:10,855 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 8044 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 8229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 8044 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:10,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 96 Invalid, 8229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 8044 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:09:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-02-15 02:09:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2022-02-15 02:09:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:09:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-02-15 02:09:10,959 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2022-02-15 02:09:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:10,959 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-02-15 02:09:10,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 89 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:10,959 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-02-15 02:09:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-15 02:09:10,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:10,960 INFO L514 BasicCegarLoop]: trace histogram [86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:10,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 02:09:10,960 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:10,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1611889698, now seen corresponding path program 86 times [2022-02-15 02:09:10,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:10,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14940484] [2022-02-15 02:09:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:10,997 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 02:09:11,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:11,060 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:11,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:11,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:11,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:11,095 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 02:09:14,017 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:14,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14940484] [2022-02-15 02:09:14,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14940484] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:14,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:14,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-15 02:09:14,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331708499] [2022-02-15 02:09:14,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:14,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-15 02:09:14,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:14,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-15 02:09:14,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=7924, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 02:09:14,019 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:19,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:19,544 INFO L93 Difference]: Finished difference Result 223 states and 232 transitions. [2022-02-15 02:09:19,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 02:09:19,544 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2022-02-15 02:09:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:19,545 INFO L225 Difference]: With dead ends: 223 [2022-02-15 02:09:19,545 INFO L226 Difference]: Without dead ends: 118 [2022-02-15 02:09:19,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=792, Invalid=31070, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 02:09:19,547 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 8824 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 9011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 8824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:19,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 311 Invalid, 9011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 8824 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 02:09:19,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-15 02:09:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 113. [2022-02-15 02:09:19,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:09:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-02-15 02:09:19,646 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2022-02-15 02:09:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:19,646 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-02-15 02:09:19,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 90 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-02-15 02:09:19,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-15 02:09:19,647 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:19,647 INFO L514 BasicCegarLoop]: trace histogram [87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:19,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 02:09:19,647 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:19,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:19,647 INFO L85 PathProgramCache]: Analyzing trace with hash -618744318, now seen corresponding path program 87 times [2022-02-15 02:09:19,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:19,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578139251] [2022-02-15 02:09:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:19,691 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 02:09:19,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:19,746 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:19,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:19,766 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 02:09:22,653 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:22,653 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578139251] [2022-02-15 02:09:22,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578139251] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:22,653 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:22,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-15 02:09:22,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297104751] [2022-02-15 02:09:22,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:22,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-15 02:09:22,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:22,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-15 02:09:22,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=8103, Unknown=0, NotChecked=0, Total=8372 [2022-02-15 02:09:22,654 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:28,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:28,197 INFO L93 Difference]: Finished difference Result 225 states and 234 transitions. [2022-02-15 02:09:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-15 02:09:28,198 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2022-02-15 02:09:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:28,198 INFO L225 Difference]: With dead ends: 225 [2022-02-15 02:09:28,198 INFO L226 Difference]: Without dead ends: 119 [2022-02-15 02:09:28,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3916 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=801, Invalid=31779, Unknown=0, NotChecked=0, Total=32580 [2022-02-15 02:09:28,200 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 8753 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 8941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 8753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:28,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 221 Invalid, 8941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 8753 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 02:09:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-15 02:09:28,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2022-02-15 02:09:28,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 106 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:09:28,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-02-15 02:09:28,316 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 107 [2022-02-15 02:09:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:28,316 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-02-15 02:09:28,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 91 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:28,316 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-02-15 02:09:28,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-15 02:09:28,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:28,317 INFO L514 BasicCegarLoop]: trace histogram [88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:28,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 02:09:28,317 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:28,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:28,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1048922078, now seen corresponding path program 88 times [2022-02-15 02:09:28,317 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:28,317 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528633491] [2022-02-15 02:09:28,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:28,374 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 02:09:28,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:28,428 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:28,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:28,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:28,456 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 02:09:31,462 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:31,462 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528633491] [2022-02-15 02:09:31,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [528633491] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:31,462 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:31,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-15 02:09:31,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64242696] [2022-02-15 02:09:31,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:31,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-15 02:09:31,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-15 02:09:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=8284, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 02:09:31,464 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:37,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:37,293 INFO L93 Difference]: Finished difference Result 227 states and 236 transitions. [2022-02-15 02:09:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 02:09:37,293 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 108 [2022-02-15 02:09:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:37,294 INFO L225 Difference]: With dead ends: 227 [2022-02-15 02:09:37,294 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 02:09:37,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4005 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=810, Invalid=32496, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 02:09:37,295 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 9397 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 9397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:37,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 386 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 9397 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 02:09:37,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 02:09:37,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 115. [2022-02-15 02:09:37,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:09:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-02-15 02:09:37,405 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 108 [2022-02-15 02:09:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:37,405 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-02-15 02:09:37,405 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.086021505376344) internal successors, (101), 92 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-02-15 02:09:37,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-15 02:09:37,405 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:37,405 INFO L514 BasicCegarLoop]: trace histogram [89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:37,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 02:09:37,406 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:37,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1499530750, now seen corresponding path program 89 times [2022-02-15 02:09:37,406 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:37,406 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523966711] [2022-02-15 02:09:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:37,473 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 02:09:37,523 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:37,523 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:37,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:37,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:37,553 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 02:09:40,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:40,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523966711] [2022-02-15 02:09:40,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [523966711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:40,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:40,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-15 02:09:40,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498250879] [2022-02-15 02:09:40,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:40,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-15 02:09:40,607 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-15 02:09:40,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=8467, Unknown=0, NotChecked=0, Total=8742 [2022-02-15 02:09:40,608 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:46,426 INFO L93 Difference]: Finished difference Result 229 states and 238 transitions. [2022-02-15 02:09:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-15 02:09:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 109 [2022-02-15 02:09:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:46,427 INFO L225 Difference]: With dead ends: 229 [2022-02-15 02:09:46,427 INFO L226 Difference]: Without dead ends: 121 [2022-02-15 02:09:46,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=819, Invalid=33221, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 02:09:46,428 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 9076 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 9269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 9076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:46,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 9269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 9076 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:09:46,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-15 02:09:46,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 116. [2022-02-15 02:09:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:09:46,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-02-15 02:09:46,529 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 109 [2022-02-15 02:09:46,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:46,529 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-02-15 02:09:46,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0851063829787233) internal successors, (102), 93 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:46,529 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-02-15 02:09:46,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-15 02:09:46,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:46,529 INFO L514 BasicCegarLoop]: trace histogram [90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:46,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 02:09:46,530 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:46,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:46,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1711469602, now seen corresponding path program 90 times [2022-02-15 02:09:46,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:46,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [794410447] [2022-02-15 02:09:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:46,570 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 02:09:46,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:46,622 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:46,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:46,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:46,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:46,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:46,646 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 02:09:49,788 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:49,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [794410447] [2022-02-15 02:09:49,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [794410447] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:49,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:49,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-15 02:09:49,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348232926] [2022-02-15 02:09:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:49,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-15 02:09:49,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-15 02:09:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=8652, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 02:09:49,796 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:55,724 INFO L93 Difference]: Finished difference Result 231 states and 240 transitions. [2022-02-15 02:09:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 02:09:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2022-02-15 02:09:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:55,725 INFO L225 Difference]: With dead ends: 231 [2022-02-15 02:09:55,725 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 02:09:55,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4186 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=828, Invalid=33954, Unknown=0, NotChecked=0, Total=34782 [2022-02-15 02:09:55,727 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9178 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 9373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 9178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:55,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 9373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 9178 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:09:55,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 02:09:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 117. [2022-02-15 02:09:55,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.037037037037037) internal successors, (112), 109 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:09:55,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-02-15 02:09:55,832 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2022-02-15 02:09:55,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:55,832 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-02-15 02:09:55,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 94 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:55,833 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-02-15 02:09:55,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-15 02:09:55,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:55,833 INFO L514 BasicCegarLoop]: trace histogram [91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:55,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 02:09:55,833 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:55,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:55,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1826734590, now seen corresponding path program 91 times [2022-02-15 02:09:55,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:55,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739407853] [2022-02-15 02:09:55,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:55,874 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 02:09:55,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:55,921 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:09:55,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:55,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:55,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:55,954 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 02:09:59,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:59,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739407853] [2022-02-15 02:09:59,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [739407853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:59,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:59,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-15 02:09:59,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838306953] [2022-02-15 02:09:59,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:59,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-15 02:09:59,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:59,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-15 02:09:59,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=8839, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 02:09:59,124 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:05,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:05,370 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2022-02-15 02:10:05,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 02:10:05,370 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 111 [2022-02-15 02:10:05,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:05,370 INFO L225 Difference]: With dead ends: 233 [2022-02-15 02:10:05,371 INFO L226 Difference]: Without dead ends: 123 [2022-02-15 02:10:05,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4278 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=837, Invalid=34695, Unknown=0, NotChecked=0, Total=35532 [2022-02-15 02:10:05,372 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 9927 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 10123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 9927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:05,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 376 Invalid, 10123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 9927 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 02:10:05,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-02-15 02:10:05,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2022-02-15 02:10:05,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 109 states have (on average 1.036697247706422) internal successors, (113), 110 states have internal predecessors, (113), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:05,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-02-15 02:10:05,488 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 111 [2022-02-15 02:10:05,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:05,488 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-02-15 02:10:05,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 95 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:05,488 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-02-15 02:10:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-02-15 02:10:05,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:05,488 INFO L514 BasicCegarLoop]: trace histogram [92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:05,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-15 02:10:05,489 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:05,489 INFO L85 PathProgramCache]: Analyzing trace with hash 158085154, now seen corresponding path program 92 times [2022-02-15 02:10:05,489 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:05,489 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664419103] [2022-02-15 02:10:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:05,524 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 02:10:05,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:05,599 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:10:05,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:05,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:05,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:05,617 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 02:10:08,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:08,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664419103] [2022-02-15 02:10:08,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [664419103] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:08,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:08,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-15 02:10:08,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790176116] [2022-02-15 02:10:08,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:08,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-15 02:10:08,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-15 02:10:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 02:10:08,866 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:15,115 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2022-02-15 02:10:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-15 02:10:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 112 [2022-02-15 02:10:15,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:15,116 INFO L225 Difference]: With dead ends: 235 [2022-02-15 02:10:15,116 INFO L226 Difference]: Without dead ends: 124 [2022-02-15 02:10:15,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=846, Invalid=35444, Unknown=0, NotChecked=0, Total=36290 [2022-02-15 02:10:15,118 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 9878 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 10077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 9878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:15,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 291 Invalid, 10077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 9878 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:10:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-15 02:10:15,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 119. [2022-02-15 02:10:15,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 111 states have internal predecessors, (114), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-02-15 02:10:15,255 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2022-02-15 02:10:15,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:15,256 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-02-15 02:10:15,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 96 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-02-15 02:10:15,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 02:10:15,256 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:15,256 INFO L514 BasicCegarLoop]: trace histogram [93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:15,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-15 02:10:15,256 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:15,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1557955074, now seen corresponding path program 93 times [2022-02-15 02:10:15,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:15,257 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [309786901] [2022-02-15 02:10:15,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:15,296 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 02:10:15,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:15,352 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:10:15,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:15,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:15,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:15,383 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 02:10:18,778 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:18,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [309786901] [2022-02-15 02:10:18,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [309786901] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:18,778 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:18,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-15 02:10:18,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424693399] [2022-02-15 02:10:18,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:18,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-15 02:10:18,779 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:18,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-15 02:10:18,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=9219, Unknown=0, NotChecked=0, Total=9506 [2022-02-15 02:10:18,792 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:25,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:25,093 INFO L93 Difference]: Finished difference Result 237 states and 246 transitions. [2022-02-15 02:10:25,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-15 02:10:25,093 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2022-02-15 02:10:25,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:25,095 INFO L225 Difference]: With dead ends: 237 [2022-02-15 02:10:25,095 INFO L226 Difference]: Without dead ends: 125 [2022-02-15 02:10:25,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=855, Invalid=36201, Unknown=0, NotChecked=0, Total=37056 [2022-02-15 02:10:25,104 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 9832 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 10033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:25,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 206 Invalid, 10033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9832 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:10:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-15 02:10:25,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 120. [2022-02-15 02:10:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-02-15 02:10:25,216 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2022-02-15 02:10:25,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:25,216 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-02-15 02:10:25,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0816326530612246) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-02-15 02:10:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-15 02:10:25,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:25,217 INFO L514 BasicCegarLoop]: trace histogram [94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:25,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-15 02:10:25,217 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:25,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:25,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2004249634, now seen corresponding path program 94 times [2022-02-15 02:10:25,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:25,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157260281] [2022-02-15 02:10:25,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:25,253 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 02:10:25,312 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:25,312 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:10:25,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:25,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:25,343 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 02:10:28,603 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:28,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157260281] [2022-02-15 02:10:28,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1157260281] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:28,603 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:28,603 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-15 02:10:28,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141010555] [2022-02-15 02:10:28,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:28,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-15 02:10:28,604 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:28,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-15 02:10:28,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=9412, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 02:10:28,605 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:34,842 INFO L93 Difference]: Finished difference Result 239 states and 248 transitions. [2022-02-15 02:10:34,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 02:10:34,846 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 114 [2022-02-15 02:10:34,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:34,847 INFO L225 Difference]: With dead ends: 239 [2022-02-15 02:10:34,847 INFO L226 Difference]: Without dead ends: 126 [2022-02-15 02:10:34,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4560 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=864, Invalid=36966, Unknown=0, NotChecked=0, Total=37830 [2022-02-15 02:10:34,849 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 10250 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 10453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 10250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:34,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 286 Invalid, 10453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 10250 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:10:34,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-15 02:10:34,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 121. [2022-02-15 02:10:34,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 113 states have internal predecessors, (116), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:34,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-02-15 02:10:34,974 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 114 [2022-02-15 02:10:34,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:34,975 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-02-15 02:10:34,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0808080808080809) internal successors, (107), 98 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:34,975 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-02-15 02:10:34,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-15 02:10:34,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:34,975 INFO L514 BasicCegarLoop]: trace histogram [95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:34,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-15 02:10:34,975 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:34,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:34,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1340488190, now seen corresponding path program 95 times [2022-02-15 02:10:34,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:34,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629557829] [2022-02-15 02:10:34,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:35,009 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 02:10:35,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:35,069 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:10:35,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:35,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:35,088 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 02:10:38,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:38,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629557829] [2022-02-15 02:10:38,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [629557829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:38,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:38,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-15 02:10:38,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145112860] [2022-02-15 02:10:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:38,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-15 02:10:38,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:38,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-15 02:10:38,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=9607, Unknown=0, NotChecked=0, Total=9900 [2022-02-15 02:10:38,435 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:44,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:44,803 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2022-02-15 02:10:44,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-15 02:10:44,804 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 115 [2022-02-15 02:10:44,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:44,804 INFO L225 Difference]: With dead ends: 241 [2022-02-15 02:10:44,804 INFO L226 Difference]: Without dead ends: 127 [2022-02-15 02:10:44,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4656 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=873, Invalid=37739, Unknown=0, NotChecked=0, Total=38612 [2022-02-15 02:10:44,806 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 10601 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 10805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 10601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:44,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 341 Invalid, 10805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 10601 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 02:10:44,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-15 02:10:44,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2022-02-15 02:10:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:44,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-02-15 02:10:44,923 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 115 [2022-02-15 02:10:44,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:44,923 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-02-15 02:10:44,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.08) internal successors, (108), 99 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-02-15 02:10:44,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 02:10:44,924 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:44,924 INFO L514 BasicCegarLoop]: trace histogram [96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:44,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-15 02:10:44,924 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:44,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:44,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1948145630, now seen corresponding path program 96 times [2022-02-15 02:10:44,925 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:44,925 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574240082] [2022-02-15 02:10:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:44,999 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 02:10:45,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:45,062 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:10:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:45,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:45,087 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 02:10:48,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:48,469 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574240082] [2022-02-15 02:10:48,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1574240082] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:48,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:48,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-15 02:10:48,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578938711] [2022-02-15 02:10:48,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:48,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-15 02:10:48,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:48,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-15 02:10:48,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=9804, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 02:10:48,470 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:55,067 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2022-02-15 02:10:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 02:10:55,067 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-02-15 02:10:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:55,068 INFO L225 Difference]: With dead ends: 243 [2022-02-15 02:10:55,068 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 02:10:55,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4753 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=882, Invalid=38520, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 02:10:55,070 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 11036 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 11243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 11036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:55,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 426 Invalid, 11243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 11036 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 02:10:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 02:10:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 123. [2022-02-15 02:10:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:10:55,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-02-15 02:10:55,195 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 116 [2022-02-15 02:10:55,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:55,195 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-02-15 02:10:55,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0792079207920793) internal successors, (109), 100 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:55,195 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-02-15 02:10:55,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-15 02:10:55,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:55,196 INFO L514 BasicCegarLoop]: trace histogram [97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:55,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-15 02:10:55,196 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:55,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:55,196 INFO L85 PathProgramCache]: Analyzing trace with hash 689310210, now seen corresponding path program 97 times [2022-02-15 02:10:55,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:55,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027718552] [2022-02-15 02:10:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:55,238 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 02:10:55,299 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:55,299 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:10:55,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:55,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:55,336 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 02:10:58,815 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:58,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027718552] [2022-02-15 02:10:58,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027718552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:58,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:58,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-15 02:10:58,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426834263] [2022-02-15 02:10:58,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:58,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-15 02:10:58,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-15 02:10:58,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=10003, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 02:10:58,828 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:05,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:05,551 INFO L93 Difference]: Finished difference Result 245 states and 254 transitions. [2022-02-15 02:11:05,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-15 02:11:05,551 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 117 [2022-02-15 02:11:05,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:05,552 INFO L225 Difference]: With dead ends: 245 [2022-02-15 02:11:05,552 INFO L226 Difference]: Without dead ends: 129 [2022-02-15 02:11:05,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4851 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=891, Invalid=39309, Unknown=0, NotChecked=0, Total=40200 [2022-02-15 02:11:05,563 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 11348 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 11557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 11348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:05,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 466 Invalid, 11557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 11348 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 02:11:05,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-15 02:11:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 124. [2022-02-15 02:11:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 116 states have internal predecessors, (119), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:11:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-02-15 02:11:05,679 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2022-02-15 02:11:05,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:05,679 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-02-15 02:11:05,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 101 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:05,679 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-02-15 02:11:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-15 02:11:05,680 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:05,680 INFO L514 BasicCegarLoop]: trace histogram [98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:05,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-15 02:11:05,680 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:05,680 INFO L85 PathProgramCache]: Analyzing trace with hash 846062626, now seen corresponding path program 98 times [2022-02-15 02:11:05,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:05,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124054883] [2022-02-15 02:11:05,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:05,721 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 02:11:05,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:05,775 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:11:05,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:05,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:05,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:05,794 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 02:11:09,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:09,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124054883] [2022-02-15 02:11:09,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [124054883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:09,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:09,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-15 02:11:09,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078748903] [2022-02-15 02:11:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:09,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-15 02:11:09,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:09,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-15 02:11:09,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=10204, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 02:11:09,401 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:15,964 INFO L93 Difference]: Finished difference Result 247 states and 256 transitions. [2022-02-15 02:11:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-15 02:11:15,965 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-02-15 02:11:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:15,966 INFO L225 Difference]: With dead ends: 247 [2022-02-15 02:11:15,966 INFO L226 Difference]: Without dead ends: 130 [2022-02-15 02:11:15,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4950 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=900, Invalid=40106, Unknown=0, NotChecked=0, Total=41006 [2022-02-15 02:11:15,967 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 10570 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 10781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 10570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:15,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 116 Invalid, 10781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 10570 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 02:11:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-15 02:11:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 125. [2022-02-15 02:11:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 117 states have internal predecessors, (120), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:11:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-02-15 02:11:16,097 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 118 [2022-02-15 02:11:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:16,097 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-02-15 02:11:16,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0776699029126213) internal successors, (111), 102 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-02-15 02:11:16,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 02:11:16,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:16,098 INFO L514 BasicCegarLoop]: trace histogram [99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:16,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-15 02:11:16,098 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1410420226, now seen corresponding path program 99 times [2022-02-15 02:11:16,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:16,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611578125] [2022-02-15 02:11:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:16,132 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 02:11:16,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:16,184 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:11:16,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:16,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:16,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:16,205 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 02:11:19,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:19,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611578125] [2022-02-15 02:11:19,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1611578125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:19,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:19,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-15 02:11:19,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014571188] [2022-02-15 02:11:19,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:19,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-15 02:11:19,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:19,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-15 02:11:19,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=10407, Unknown=0, NotChecked=0, Total=10712 [2022-02-15 02:11:19,821 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:26,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:26,772 INFO L93 Difference]: Finished difference Result 249 states and 258 transitions. [2022-02-15 02:11:26,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-15 02:11:26,772 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 119 [2022-02-15 02:11:26,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:26,773 INFO L225 Difference]: With dead ends: 249 [2022-02-15 02:11:26,773 INFO L226 Difference]: Without dead ends: 131 [2022-02-15 02:11:26,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5050 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=909, Invalid=40911, Unknown=0, NotChecked=0, Total=41820 [2022-02-15 02:11:26,775 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 11475 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 11687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 11475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:26,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 366 Invalid, 11687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 11475 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 02:11:26,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-15 02:11:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2022-02-15 02:11:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:11:26,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-02-15 02:11:26,897 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 119 [2022-02-15 02:11:26,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:26,897 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-02-15 02:11:26,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 103 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-02-15 02:11:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-15 02:11:26,897 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:26,897 INFO L514 BasicCegarLoop]: trace histogram [100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:26,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-15 02:11:26,897 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:26,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:26,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1725636642, now seen corresponding path program 100 times [2022-02-15 02:11:26,898 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:26,898 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1491842853] [2022-02-15 02:11:26,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:26,934 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 02:11:27,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:27,001 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:11:27,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:27,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:27,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:27,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:27,037 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 02:11:30,618 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:30,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1491842853] [2022-02-15 02:11:30,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1491842853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:30,618 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:30,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-15 02:11:30,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775561842] [2022-02-15 02:11:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:30,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-15 02:11:30,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:30,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-15 02:11:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=10612, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 02:11:30,619 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:37,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:37,429 INFO L93 Difference]: Finished difference Result 251 states and 260 transitions. [2022-02-15 02:11:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-15 02:11:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2022-02-15 02:11:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:37,430 INFO L225 Difference]: With dead ends: 251 [2022-02-15 02:11:37,430 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 02:11:37,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5151 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=918, Invalid=41724, Unknown=0, NotChecked=0, Total=42642 [2022-02-15 02:11:37,432 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 10910 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 11125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 10910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:37,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 91 Invalid, 11125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 10910 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 02:11:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 02:11:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 127. [2022-02-15 02:11:37,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:11:37,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-02-15 02:11:37,570 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 120 [2022-02-15 02:11:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:37,571 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-02-15 02:11:37,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 104 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:37,571 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-02-15 02:11:37,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-15 02:11:37,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:37,571 INFO L514 BasicCegarLoop]: trace histogram [101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:37,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-15 02:11:37,571 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:37,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:37,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1387556350, now seen corresponding path program 101 times [2022-02-15 02:11:37,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:37,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517764347] [2022-02-15 02:11:37,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:37,607 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 02:11:37,660 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:37,660 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:11:37,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:37,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:37,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:37,678 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 02:11:41,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:41,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517764347] [2022-02-15 02:11:41,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1517764347] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:41,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:41,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-15 02:11:41,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927708787] [2022-02-15 02:11:41,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-15 02:11:41,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-15 02:11:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=10819, Unknown=0, NotChecked=0, Total=11130 [2022-02-15 02:11:41,424 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:48,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:48,656 INFO L93 Difference]: Finished difference Result 253 states and 262 transitions. [2022-02-15 02:11:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-15 02:11:48,656 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 121 [2022-02-15 02:11:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:48,657 INFO L225 Difference]: With dead ends: 253 [2022-02-15 02:11:48,657 INFO L226 Difference]: Without dead ends: 133 [2022-02-15 02:11:48,659 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5253 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=927, Invalid=42545, Unknown=0, NotChecked=0, Total=43472 [2022-02-15 02:11:48,659 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 12281 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 12497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 12281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:48,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 506 Invalid, 12497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 12281 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:11:48,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-15 02:11:48,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2022-02-15 02:11:48,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:11:48,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-02-15 02:11:48,785 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 121 [2022-02-15 02:11:48,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:48,785 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-02-15 02:11:48,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 105 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:48,786 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-02-15 02:11:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-15 02:11:48,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:48,786 INFO L514 BasicCegarLoop]: trace histogram [102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:48,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-15 02:11:48,786 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:48,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:48,786 INFO L85 PathProgramCache]: Analyzing trace with hash 887708706, now seen corresponding path program 102 times [2022-02-15 02:11:48,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:48,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329374092] [2022-02-15 02:11:48,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:48,822 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 02:11:48,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:48,888 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:11:48,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:48,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:48,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:48,908 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 02:11:52,711 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:52,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329374092] [2022-02-15 02:11:52,711 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1329374092] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:52,711 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:52,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-15 02:11:52,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225718720] [2022-02-15 02:11:52,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:52,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-15 02:11:52,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:52,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-15 02:11:52,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=11028, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 02:11:52,712 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:00,031 INFO L93 Difference]: Finished difference Result 255 states and 264 transitions. [2022-02-15 02:12:00,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-15 02:12:00,032 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 122 [2022-02-15 02:12:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:00,032 INFO L225 Difference]: With dead ends: 255 [2022-02-15 02:12:00,032 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 02:12:00,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5356 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=936, Invalid=43374, Unknown=0, NotChecked=0, Total=44310 [2022-02-15 02:12:00,035 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 12365 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 12583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 12365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:00,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 461 Invalid, 12583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 12365 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:12:00,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 02:12:00,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 129. [2022-02-15 02:12:00,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-02-15 02:12:00,170 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 122 [2022-02-15 02:12:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:00,170 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-02-15 02:12:00,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.074766355140187) internal successors, (115), 106 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-02-15 02:12:00,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-02-15 02:12:00,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:00,175 INFO L514 BasicCegarLoop]: trace histogram [103, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:00,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-15 02:12:00,176 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:00,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:00,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1593518590, now seen corresponding path program 103 times [2022-02-15 02:12:00,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:00,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357114780] [2022-02-15 02:12:00,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:00,213 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 02:12:00,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:00,259 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:12:00,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:00,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:00,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:00,290 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 02:12:04,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:04,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357114780] [2022-02-15 02:12:04,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [357114780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:04,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:04,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-15 02:12:04,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482548246] [2022-02-15 02:12:04,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:04,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-15 02:12:04,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:04,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-15 02:12:04,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=11239, Unknown=0, NotChecked=0, Total=11556 [2022-02-15 02:12:04,135 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:11,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:11,299 INFO L93 Difference]: Finished difference Result 257 states and 266 transitions. [2022-02-15 02:12:11,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-15 02:12:11,300 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-02-15 02:12:11,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:11,300 INFO L225 Difference]: With dead ends: 257 [2022-02-15 02:12:11,300 INFO L226 Difference]: Without dead ends: 135 [2022-02-15 02:12:11,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5460 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=945, Invalid=44211, Unknown=0, NotChecked=0, Total=45156 [2022-02-15 02:12:11,302 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11358 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 11579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 11358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:11,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 11579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 11358 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 02:12:11,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-15 02:12:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 130. [2022-02-15 02:12:11,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 122 states have internal predecessors, (125), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-02-15 02:12:11,435 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 123 [2022-02-15 02:12:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:11,435 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-02-15 02:12:11,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0740740740740742) internal successors, (116), 107 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:11,435 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-02-15 02:12:11,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-15 02:12:11,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:11,436 INFO L514 BasicCegarLoop]: trace histogram [104, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:11,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-15 02:12:11,436 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:11,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1202153438, now seen corresponding path program 104 times [2022-02-15 02:12:11,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:11,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540637800] [2022-02-15 02:12:11,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:11,488 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 02:12:11,538 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:11,539 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:12:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:11,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:11,560 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 02:12:15,443 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:15,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540637800] [2022-02-15 02:12:15,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1540637800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:15,443 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:15,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-15 02:12:15,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885028373] [2022-02-15 02:12:15,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:15,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-15 02:12:15,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:15,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-15 02:12:15,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=11452, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 02:12:15,444 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:22,721 INFO L93 Difference]: Finished difference Result 259 states and 268 transitions. [2022-02-15 02:12:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-15 02:12:22,722 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 124 [2022-02-15 02:12:22,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:22,722 INFO L225 Difference]: With dead ends: 259 [2022-02-15 02:12:22,722 INFO L226 Difference]: Without dead ends: 136 [2022-02-15 02:12:22,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5565 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=954, Invalid=45056, Unknown=0, NotChecked=0, Total=46010 [2022-02-15 02:12:22,725 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11614 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 11837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 11614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:22,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 11837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 11614 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 02:12:22,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-15 02:12:22,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 131. [2022-02-15 02:12:22,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:22,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-02-15 02:12:22,865 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 124 [2022-02-15 02:12:22,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:22,866 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-02-15 02:12:22,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.073394495412844) internal successors, (117), 108 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:22,866 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-02-15 02:12:22,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-15 02:12:22,867 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:22,867 INFO L514 BasicCegarLoop]: trace histogram [105, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:22,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-15 02:12:22,867 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:22,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:22,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1954735614, now seen corresponding path program 105 times [2022-02-15 02:12:22,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:22,868 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779050105] [2022-02-15 02:12:22,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:22,921 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 02:12:22,975 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:22,975 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:12:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:22,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:22,999 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 02:12:26,993 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:26,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779050105] [2022-02-15 02:12:26,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [779050105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:26,993 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:26,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-15 02:12:26,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258634468] [2022-02-15 02:12:26,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:26,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-15 02:12:26,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:26,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-15 02:12:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=11667, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 02:12:26,994 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:34,690 INFO L93 Difference]: Finished difference Result 261 states and 270 transitions. [2022-02-15 02:12:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-15 02:12:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 125 [2022-02-15 02:12:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:34,690 INFO L225 Difference]: With dead ends: 261 [2022-02-15 02:12:34,690 INFO L226 Difference]: Without dead ends: 137 [2022-02-15 02:12:34,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5671 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=963, Invalid=45909, Unknown=0, NotChecked=0, Total=46872 [2022-02-15 02:12:34,693 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 12811 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 13035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 12811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:34,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 391 Invalid, 13035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 12811 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-15 02:12:34,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-15 02:12:34,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 132. [2022-02-15 02:12:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-02-15 02:12:34,833 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2022-02-15 02:12:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:34,833 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-02-15 02:12:34,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0727272727272728) internal successors, (118), 109 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-02-15 02:12:34,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-15 02:12:34,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:34,834 INFO L514 BasicCegarLoop]: trace histogram [106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:34,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-15 02:12:34,834 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:34,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:34,834 INFO L85 PathProgramCache]: Analyzing trace with hash 485020706, now seen corresponding path program 106 times [2022-02-15 02:12:34,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:34,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1162054097] [2022-02-15 02:12:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:34,868 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 02:12:34,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:34,920 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:12:34,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:34,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:34,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:38,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:38,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1162054097] [2022-02-15 02:12:38,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1162054097] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:38,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:38,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-15 02:12:38,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060502295] [2022-02-15 02:12:38,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:38,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-15 02:12:38,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-15 02:12:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=11884, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 02:12:38,979 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:46,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:46,611 INFO L93 Difference]: Finished difference Result 263 states and 272 transitions. [2022-02-15 02:12:46,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 02:12:46,611 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 126 [2022-02-15 02:12:46,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:46,611 INFO L225 Difference]: With dead ends: 263 [2022-02-15 02:12:46,611 INFO L226 Difference]: Without dead ends: 138 [2022-02-15 02:12:46,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5778 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=972, Invalid=46770, Unknown=0, NotChecked=0, Total=47742 [2022-02-15 02:12:46,613 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 12468 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 12695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 12468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:46,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 191 Invalid, 12695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 12468 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:12:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-15 02:12:46,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 133. [2022-02-15 02:12:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:46,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-02-15 02:12:46,754 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 126 [2022-02-15 02:12:46,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:46,755 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-02-15 02:12:46,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.072072072072072) internal successors, (119), 110 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:46,755 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-02-15 02:12:46,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-15 02:12:46,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:46,755 INFO L514 BasicCegarLoop]: trace histogram [107, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:46,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-15 02:12:46,755 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:46,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1191944702, now seen corresponding path program 107 times [2022-02-15 02:12:46,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:46,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499529] [2022-02-15 02:12:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:46,791 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 02:12:46,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:46,845 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:12:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:46,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:46,890 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 02:12:50,922 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:50,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499529] [2022-02-15 02:12:50,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499529] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:50,922 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:50,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-15 02:12:50,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104414053] [2022-02-15 02:12:50,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:50,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-15 02:12:50,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:50,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-15 02:12:50,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=12103, Unknown=0, NotChecked=0, Total=12432 [2022-02-15 02:12:50,923 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:58,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:58,821 INFO L93 Difference]: Finished difference Result 265 states and 274 transitions. [2022-02-15 02:12:58,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-15 02:12:58,821 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 127 [2022-02-15 02:12:58,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:58,822 INFO L225 Difference]: With dead ends: 265 [2022-02-15 02:12:58,822 INFO L226 Difference]: Without dead ends: 139 [2022-02-15 02:12:58,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5886 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=981, Invalid=47639, Unknown=0, NotChecked=0, Total=48620 [2022-02-15 02:12:58,824 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 12786 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 13015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 12786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:58,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 226 Invalid, 13015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 12786 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-15 02:12:58,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-02-15 02:12:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 134. [2022-02-15 02:12:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:12:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-02-15 02:12:58,965 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 127 [2022-02-15 02:12:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:58,965 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-02-15 02:12:58,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.0714285714285714) internal successors, (120), 111 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-02-15 02:12:58,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-15 02:12:58,965 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:58,965 INFO L514 BasicCegarLoop]: trace histogram [108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:58,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-15 02:12:58,966 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:58,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:58,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1638264798, now seen corresponding path program 108 times [2022-02-15 02:12:58,966 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:58,966 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629858080] [2022-02-15 02:12:58,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:59,002 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 02:12:59,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:59,054 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:12:59,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:59,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:59,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:59,135 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 02:13:03,373 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:03,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629858080] [2022-02-15 02:13:03,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [629858080] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:03,373 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:03,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-15 02:13:03,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154747793] [2022-02-15 02:13:03,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:03,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-15 02:13:03,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-15 02:13:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=12324, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 02:13:03,374 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:11,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:11,604 INFO L93 Difference]: Finished difference Result 267 states and 276 transitions. [2022-02-15 02:13:11,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-15 02:13:11,604 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 128 [2022-02-15 02:13:11,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:11,605 INFO L225 Difference]: With dead ends: 267 [2022-02-15 02:13:11,605 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 02:13:11,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5995 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=990, Invalid=48516, Unknown=0, NotChecked=0, Total=49506 [2022-02-15 02:13:11,607 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 13765 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 13995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 13765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:11,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 496 Invalid, 13995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 13765 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-15 02:13:11,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 02:13:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2022-02-15 02:13:11,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:13:11,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-02-15 02:13:11,752 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2022-02-15 02:13:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:11,752 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-02-15 02:13:11,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 112 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-02-15 02:13:11,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-15 02:13:11,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:11,753 INFO L514 BasicCegarLoop]: trace histogram [109, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:11,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-15 02:13:11,753 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:11,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:11,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1705681410, now seen corresponding path program 109 times [2022-02-15 02:13:11,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:11,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856467111] [2022-02-15 02:13:11,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:11,794 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 02:13:11,846 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:11,846 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:13:11,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:11,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:11,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:11,871 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 02:13:16,101 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:16,101 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856467111] [2022-02-15 02:13:16,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1856467111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:16,101 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:16,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-15 02:13:16,101 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781093412] [2022-02-15 02:13:16,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:16,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-15 02:13:16,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:16,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-15 02:13:16,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=12547, Unknown=0, NotChecked=0, Total=12882 [2022-02-15 02:13:16,103 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:24,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:24,273 INFO L93 Difference]: Finished difference Result 269 states and 278 transitions. [2022-02-15 02:13:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-15 02:13:24,274 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 129 [2022-02-15 02:13:24,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:24,274 INFO L225 Difference]: With dead ends: 269 [2022-02-15 02:13:24,274 INFO L226 Difference]: Without dead ends: 141 [2022-02-15 02:13:24,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6105 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=999, Invalid=49401, Unknown=0, NotChecked=0, Total=50400 [2022-02-15 02:13:24,276 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 13162 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 13395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 13162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:24,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 201 Invalid, 13395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 13162 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-02-15 02:13:24,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-02-15 02:13:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2022-02-15 02:13:24,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 127 states have (on average 1.031496062992126) internal successors, (131), 128 states have internal predecessors, (131), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:13:24,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-02-15 02:13:24,422 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2022-02-15 02:13:24,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:24,423 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-02-15 02:13:24,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.0701754385964912) internal successors, (122), 113 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:24,423 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-02-15 02:13:24,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-15 02:13:24,423 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:24,423 INFO L514 BasicCegarLoop]: trace histogram [110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:24,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-15 02:13:24,423 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:24,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:24,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2006168542, now seen corresponding path program 110 times [2022-02-15 02:13:24,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:24,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499054811] [2022-02-15 02:13:24,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:24,460 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 02:13:24,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:24,508 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:13:24,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:24,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:24,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:28,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:28,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499054811] [2022-02-15 02:13:28,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499054811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:28,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:28,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-15 02:13:28,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387154432] [2022-02-15 02:13:28,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:28,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-15 02:13:28,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:28,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-15 02:13:28,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=12772, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 02:13:28,876 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:37,345 INFO L93 Difference]: Finished difference Result 271 states and 280 transitions. [2022-02-15 02:13:37,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-15 02:13:37,346 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 130 [2022-02-15 02:13:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:37,346 INFO L225 Difference]: With dead ends: 271 [2022-02-15 02:13:37,346 INFO L226 Difference]: Without dead ends: 142 [2022-02-15 02:13:37,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6216 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1008, Invalid=50294, Unknown=0, NotChecked=0, Total=51302 [2022-02-15 02:13:37,349 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 13795 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 14029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 13795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:37,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 346 Invalid, 14029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 13795 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-15 02:13:37,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-15 02:13:37,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 137. [2022-02-15 02:13:37,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:13:37,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-02-15 02:13:37,499 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 130 [2022-02-15 02:13:37,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:37,499 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-02-15 02:13:37,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 114 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:37,499 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-02-15 02:13:37,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-15 02:13:37,500 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:37,500 INFO L514 BasicCegarLoop]: trace histogram [111, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:37,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-15 02:13:37,500 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:37,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:37,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1109400062, now seen corresponding path program 111 times [2022-02-15 02:13:37,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:37,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514996888] [2022-02-15 02:13:37,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:37,537 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 02:13:37,596 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:37,597 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:13:37,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:37,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:37,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:37,630 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 02:13:42,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:42,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514996888] [2022-02-15 02:13:42,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [514996888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:42,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:42,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-15 02:13:42,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398592189] [2022-02-15 02:13:42,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:42,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-15 02:13:42,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:42,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-15 02:13:42,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=12999, Unknown=0, NotChecked=0, Total=13340 [2022-02-15 02:13:42,078 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:50,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:50,732 INFO L93 Difference]: Finished difference Result 273 states and 282 transitions. [2022-02-15 02:13:50,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-15 02:13:50,732 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 131 [2022-02-15 02:13:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:50,733 INFO L225 Difference]: With dead ends: 273 [2022-02-15 02:13:50,733 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 02:13:50,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6328 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1017, Invalid=51195, Unknown=0, NotChecked=0, Total=52212 [2022-02-15 02:13:50,735 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 14373 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 14609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 14373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:50,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 471 Invalid, 14609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 14373 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:13:50,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 02:13:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 138. [2022-02-15 02:13:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 states have internal predecessors, (133), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:13:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-02-15 02:13:50,907 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 131 [2022-02-15 02:13:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:50,907 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-02-15 02:13:50,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0689655172413792) internal successors, (124), 115 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:50,907 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-02-15 02:13:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-15 02:13:50,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:50,908 INFO L514 BasicCegarLoop]: trace histogram [112, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:50,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-15 02:13:50,908 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:50,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash 920619042, now seen corresponding path program 112 times [2022-02-15 02:13:50,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:50,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330002391] [2022-02-15 02:13:50,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:50,951 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 02:13:51,020 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:51,020 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:13:51,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:51,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:51,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:51,049 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 02:13:55,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:55,581 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330002391] [2022-02-15 02:13:55,581 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [330002391] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:55,581 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:55,581 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-15 02:13:55,581 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712543639] [2022-02-15 02:13:55,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:55,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-15 02:13:55,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:55,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-15 02:13:55,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=13228, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 02:13:55,582 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:04,096 INFO L93 Difference]: Finished difference Result 275 states and 284 transitions. [2022-02-15 02:14:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-15 02:14:04,097 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 132 [2022-02-15 02:14:04,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:04,097 INFO L225 Difference]: With dead ends: 275 [2022-02-15 02:14:04,097 INFO L226 Difference]: Without dead ends: 144 [2022-02-15 02:14:04,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6441 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1026, Invalid=52104, Unknown=0, NotChecked=0, Total=53130 [2022-02-15 02:14:04,099 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13594 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 13833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 13594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:04,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 111 Invalid, 13833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 13594 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-15 02:14:04,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-15 02:14:04,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 139. [2022-02-15 02:14:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 131 states have internal predecessors, (134), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:14:04,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-02-15 02:14:04,256 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 132 [2022-02-15 02:14:04,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:04,257 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-02-15 02:14:04,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0683760683760684) internal successors, (125), 116 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:04,257 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-02-15 02:14:04,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-15 02:14:04,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:04,257 INFO L514 BasicCegarLoop]: trace histogram [113, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:14:04,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-15 02:14:04,257 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:04,257 INFO L85 PathProgramCache]: Analyzing trace with hash -573298174, now seen corresponding path program 113 times [2022-02-15 02:14:04,257 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:04,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454531638] [2022-02-15 02:14:04,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:04,291 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 02:14:04,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:04,351 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:14:04,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:04,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:04,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:04,369 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 02:14:08,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:08,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454531638] [2022-02-15 02:14:08,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [454531638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:08,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:08,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-15 02:14:08,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116119940] [2022-02-15 02:14:08,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:08,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-15 02:14:08,977 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:08,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-15 02:14:08,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=13459, Unknown=0, NotChecked=0, Total=13806 [2022-02-15 02:14:08,978 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:17,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:17,841 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2022-02-15 02:14:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-15 02:14:17,841 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 133 [2022-02-15 02:14:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:17,842 INFO L225 Difference]: With dead ends: 277 [2022-02-15 02:14:17,842 INFO L226 Difference]: Without dead ends: 145 [2022-02-15 02:14:17,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6555 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1035, Invalid=53021, Unknown=0, NotChecked=0, Total=54056 [2022-02-15 02:14:17,844 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 15017 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 15257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 15017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:17,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 536 Invalid, 15257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 15017 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 02:14:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-15 02:14:18,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2022-02-15 02:14:18,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 131 states have (on average 1.0305343511450382) internal successors, (135), 132 states have internal predecessors, (135), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:14:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-02-15 02:14:18,000 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 133 [2022-02-15 02:14:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:18,001 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-02-15 02:14:18,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.0677966101694916) internal successors, (126), 117 states have internal predecessors, (126), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-02-15 02:14:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-15 02:14:18,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:18,001 INFO L514 BasicCegarLoop]: trace histogram [114, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:14:18,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-15 02:14:18,001 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:18,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:18,001 INFO L85 PathProgramCache]: Analyzing trace with hash 359908386, now seen corresponding path program 114 times [2022-02-15 02:14:18,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:18,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1615613927] [2022-02-15 02:14:18,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:18,036 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 02:14:18,100 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:18,100 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:14:18,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:18,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:18,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:18,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:18,120 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 02:14:22,697 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:22,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1615613927] [2022-02-15 02:14:22,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1615613927] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:22,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:22,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-15 02:14:22,698 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476351854] [2022-02-15 02:14:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:22,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-15 02:14:22,698 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:22,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-15 02:14:22,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=13692, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 02:14:22,699 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:31,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:31,605 INFO L93 Difference]: Finished difference Result 279 states and 288 transitions. [2022-02-15 02:14:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-15 02:14:31,605 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 134 [2022-02-15 02:14:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:31,606 INFO L225 Difference]: With dead ends: 279 [2022-02-15 02:14:31,606 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 02:14:31,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6670 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1044, Invalid=53946, Unknown=0, NotChecked=0, Total=54990 [2022-02-15 02:14:31,608 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 14635 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 14877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 14635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:31,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 316 Invalid, 14877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 14635 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:14:31,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 02:14:31,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 141. [2022-02-15 02:14:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 133 states have internal predecessors, (136), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:14:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-02-15 02:14:31,778 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 134 [2022-02-15 02:14:31,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:31,778 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-02-15 02:14:31,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0672268907563025) internal successors, (127), 118 states have internal predecessors, (127), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:31,778 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-02-15 02:14:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-15 02:14:31,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:31,779 INFO L514 BasicCegarLoop]: trace histogram [115, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:14:31,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-15 02:14:31,779 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:31,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -775459326, now seen corresponding path program 115 times [2022-02-15 02:14:31,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:31,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960052694] [2022-02-15 02:14:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:31,815 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 02:14:31,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:31,875 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:14:31,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:31,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:31,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:31,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:31,901 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 02:14:36,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:36,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960052694] [2022-02-15 02:14:36,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [960052694] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:36,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:36,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-15 02:14:36,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414592304] [2022-02-15 02:14:36,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:36,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-15 02:14:36,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:36,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-15 02:14:36,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=13927, Unknown=0, NotChecked=0, Total=14280 [2022-02-15 02:14:36,598 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 120 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:45,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:45,711 INFO L93 Difference]: Finished difference Result 281 states and 290 transitions. [2022-02-15 02:14:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-15 02:14:45,711 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 135 [2022-02-15 02:14:45,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:45,712 INFO L225 Difference]: With dead ends: 281 [2022-02-15 02:14:45,712 INFO L226 Difference]: Without dead ends: 147 [2022-02-15 02:14:45,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6786 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1053, Invalid=54879, Unknown=0, NotChecked=0, Total=55932 [2022-02-15 02:14:45,715 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 15123 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 15367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 15123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:45,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 406 Invalid, 15367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 15123 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 02:14:45,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-02-15 02:14:45,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2022-02-15 02:14:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 134 states have internal predecessors, (137), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:14:45,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2022-02-15 02:14:45,878 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 135 [2022-02-15 02:14:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:14:45,878 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2022-02-15 02:14:45,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.0666666666666667) internal successors, (128), 119 states have internal predecessors, (128), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2022-02-15 02:14:45,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-02-15 02:14:45,878 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:14:45,878 INFO L514 BasicCegarLoop]: trace histogram [116, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:14:45,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-15 02:14:45,879 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:14:45,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:14:45,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1612120030, now seen corresponding path program 116 times [2022-02-15 02:14:45,879 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:14:45,879 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1724590534] [2022-02-15 02:14:45,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:14:45,911 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 02:14:45,999 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:14:46,000 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:14:46,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:14:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:46,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:14:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:14:46,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:14:50,811 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:14:50,811 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1724590534] [2022-02-15 02:14:50,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1724590534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:14:50,812 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:14:50,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-15 02:14:50,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356082025] [2022-02-15 02:14:50,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:14:50,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-15 02:14:50,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:14:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-15 02:14:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=14164, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 02:14:50,813 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand has 121 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 120 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:14:59,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:14:59,970 INFO L93 Difference]: Finished difference Result 283 states and 292 transitions. [2022-02-15 02:14:59,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-15 02:14:59,971 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 120 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 136 [2022-02-15 02:14:59,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:14:59,971 INFO L225 Difference]: With dead ends: 283 [2022-02-15 02:14:59,971 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 02:14:59,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1062, Invalid=55820, Unknown=0, NotChecked=0, Total=56882 [2022-02-15 02:14:59,974 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 15010 mSolverCounterSat, 247 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 15257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 247 IncrementalHoareTripleChecker+Valid, 15010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:14:59,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 281 Invalid, 15257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [247 Valid, 15010 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 02:14:59,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 02:15:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 143. [2022-02-15 02:15:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 135 states have internal predecessors, (138), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:15:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-02-15 02:15:00,143 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 136 [2022-02-15 02:15:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:00,143 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-02-15 02:15:00,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.0661157024793388) internal successors, (129), 120 states have internal predecessors, (129), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:00,143 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-02-15 02:15:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-15 02:15:00,144 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:00,144 INFO L514 BasicCegarLoop]: trace histogram [117, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:00,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-15 02:15:00,144 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:00,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:00,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1778798078, now seen corresponding path program 117 times [2022-02-15 02:15:00,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:00,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803369544] [2022-02-15 02:15:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:00,181 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 02:15:00,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:00,267 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:00,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:00,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:00,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:00,318 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 02:15:05,156 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:05,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803369544] [2022-02-15 02:15:05,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1803369544] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:05,156 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:05,156 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-02-15 02:15:05,156 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105436678] [2022-02-15 02:15:05,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:05,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-02-15 02:15:05,156 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-02-15 02:15:05,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=14403, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 02:15:05,157 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 122 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:14,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:14,325 INFO L93 Difference]: Finished difference Result 285 states and 294 transitions. [2022-02-15 02:15:14,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-02-15 02:15:14,325 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 137 [2022-02-15 02:15:14,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:14,325 INFO L225 Difference]: With dead ends: 285 [2022-02-15 02:15:14,325 INFO L226 Difference]: Without dead ends: 149 [2022-02-15 02:15:14,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7021 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1071, Invalid=56769, Unknown=0, NotChecked=0, Total=57840 [2022-02-15 02:15:14,328 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 14844 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 15093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 14844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:14,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 136 Invalid, 15093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 14844 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:15:14,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-15 02:15:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 144. [2022-02-15 02:15:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 136 states have internal predecessors, (139), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:15:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-02-15 02:15:14,500 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 137 [2022-02-15 02:15:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:14,500 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-02-15 02:15:14,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.0655737704918034) internal successors, (130), 121 states have internal predecessors, (130), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-02-15 02:15:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-15 02:15:14,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:14,501 INFO L514 BasicCegarLoop]: trace histogram [118, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:14,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-15 02:15:14,501 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:14,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:14,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1644117026, now seen corresponding path program 118 times [2022-02-15 02:15:14,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:14,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [135680368] [2022-02-15 02:15:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:14,535 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 02:15:14,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:14,601 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:14,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:14,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:14,621 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 02:15:19,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:19,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [135680368] [2022-02-15 02:15:19,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [135680368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:19,513 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:19,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-15 02:15:19,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369263212] [2022-02-15 02:15:19,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:19,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-15 02:15:19,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:19,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-15 02:15:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=14644, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 02:15:19,515 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 122 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:28,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:28,873 INFO L93 Difference]: Finished difference Result 287 states and 296 transitions. [2022-02-15 02:15:28,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-15 02:15:28,874 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 122 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 138 [2022-02-15 02:15:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:28,874 INFO L225 Difference]: With dead ends: 287 [2022-02-15 02:15:28,874 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 02:15:28,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7140 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1080, Invalid=57726, Unknown=0, NotChecked=0, Total=58806 [2022-02-15 02:15:28,876 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 15143 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 15393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 15143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:28,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 156 Invalid, 15393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 15143 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-15 02:15:28,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 02:15:29,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 145. [2022-02-15 02:15:29,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 137 states have internal predecessors, (140), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:15:29,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-02-15 02:15:29,050 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 138 [2022-02-15 02:15:29,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:29,050 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-02-15 02:15:29,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.065040650406504) internal successors, (131), 122 states have internal predecessors, (131), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:29,050 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-02-15 02:15:29,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 02:15:29,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:29,050 INFO L514 BasicCegarLoop]: trace histogram [119, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:29,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-15 02:15:29,051 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:29,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:29,051 INFO L85 PathProgramCache]: Analyzing trace with hash 380302850, now seen corresponding path program 119 times [2022-02-15 02:15:29,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:29,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350864878] [2022-02-15 02:15:29,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:29,085 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 02:15:29,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:29,137 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:29,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:29,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:29,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:34,398 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:34,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350864878] [2022-02-15 02:15:34,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [350864878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:34,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:34,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-15 02:15:34,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955858089] [2022-02-15 02:15:34,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:34,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-15 02:15:34,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:34,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-15 02:15:34,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=14887, Unknown=0, NotChecked=0, Total=15252 [2022-02-15 02:15:34,400 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 124 states, 124 states have (on average 1.064516129032258) internal successors, (132), 123 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:44,282 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2022-02-15 02:15:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-15 02:15:44,282 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.064516129032258) internal successors, (132), 123 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 139 [2022-02-15 02:15:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:44,283 INFO L225 Difference]: With dead ends: 289 [2022-02-15 02:15:44,283 INFO L226 Difference]: Without dead ends: 151 [2022-02-15 02:15:44,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7260 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=1089, Invalid=58691, Unknown=0, NotChecked=0, Total=59780 [2022-02-15 02:15:44,286 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 15442 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 15695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 15442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:44,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 176 Invalid, 15695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 15442 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 02:15:44,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-15 02:15:44,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 146. [2022-02-15 02:15:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 138 states have internal predecessors, (141), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:15:44,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 149 transitions. [2022-02-15 02:15:44,486 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 149 transitions. Word has length 139 [2022-02-15 02:15:44,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:44,486 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 149 transitions. [2022-02-15 02:15:44,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.064516129032258) internal successors, (132), 123 states have internal predecessors, (132), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:44,486 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 149 transitions. [2022-02-15 02:15:44,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-15 02:15:44,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:44,486 INFO L514 BasicCegarLoop]: trace histogram [120, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:44,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-15 02:15:44,486 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:44,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:44,487 INFO L85 PathProgramCache]: Analyzing trace with hash -143230942, now seen corresponding path program 120 times [2022-02-15 02:15:44,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:44,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950640423] [2022-02-15 02:15:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:15:44,523 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 02:15:44,576 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:15:44,577 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:15:44,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:15:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:44,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:15:44,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:15:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:15:49,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:15:49,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950640423] [2022-02-15 02:15:49,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [950640423] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:15:49,790 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:15:49,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-02-15 02:15:49,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349198649] [2022-02-15 02:15:49,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:15:49,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-02-15 02:15:49,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:15:49,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-02-15 02:15:49,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=15132, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 02:15:49,792 INFO L87 Difference]: Start difference. First operand 146 states and 149 transitions. Second operand has 125 states, 125 states have (on average 1.064) internal successors, (133), 124 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:59,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:15:59,781 INFO L93 Difference]: Finished difference Result 291 states and 300 transitions. [2022-02-15 02:15:59,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-15 02:15:59,782 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.064) internal successors, (133), 124 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 140 [2022-02-15 02:15:59,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:15:59,782 INFO L225 Difference]: With dead ends: 291 [2022-02-15 02:15:59,782 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 02:15:59,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7381 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=1098, Invalid=59664, Unknown=0, NotChecked=0, Total=60762 [2022-02-15 02:15:59,785 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 15800 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 16055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 15800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:15:59,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 216 Invalid, 16055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 15800 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 02:15:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 02:15:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 147. [2022-02-15 02:15:59,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 139 states have internal predecessors, (142), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:15:59,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-02-15 02:15:59,982 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 140 [2022-02-15 02:15:59,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:15:59,982 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-02-15 02:15:59,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.064) internal successors, (133), 124 states have internal predecessors, (133), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:15:59,982 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-02-15 02:15:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-02-15 02:15:59,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:15:59,983 INFO L514 BasicCegarLoop]: trace histogram [121, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:15:59,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-15 02:15:59,983 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:15:59,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:15:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash 807090690, now seen corresponding path program 121 times [2022-02-15 02:15:59,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:15:59,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773911921] [2022-02-15 02:15:59,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:00,020 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 02:16:00,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:00,102 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:16:00,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:00,122 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 02:16:05,470 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:16:05,470 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773911921] [2022-02-15 02:16:05,470 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773911921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:16:05,470 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:16:05,470 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-15 02:16:05,470 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42650265] [2022-02-15 02:16:05,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:16:05,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-15 02:16:05,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:16:05,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-15 02:16:05,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=15379, Unknown=0, NotChecked=0, Total=15750 [2022-02-15 02:16:05,472 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 126 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:15,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:16:15,828 INFO L93 Difference]: Finished difference Result 293 states and 302 transitions. [2022-02-15 02:16:15,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-15 02:16:15,828 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 141 [2022-02-15 02:16:15,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:16:15,829 INFO L225 Difference]: With dead ends: 293 [2022-02-15 02:16:15,829 INFO L226 Difference]: Without dead ends: 153 [2022-02-15 02:16:15,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7503 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1107, Invalid=60645, Unknown=0, NotChecked=0, Total=61752 [2022-02-15 02:16:15,832 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 20 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 16650 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 16907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 16650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:16:15,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 431 Invalid, 16907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 16650 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-15 02:16:15,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-15 02:16:16,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 148. [2022-02-15 02:16:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 140 states have internal predecessors, (143), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 02:16:16,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-02-15 02:16:16,038 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 141 [2022-02-15 02:16:16,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:16:16,038 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-02-15 02:16:16,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.0634920634920635) internal successors, (134), 125 states have internal predecessors, (134), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:16:16,039 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-02-15 02:16:16,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-02-15 02:16:16,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:16:16,039 INFO L514 BasicCegarLoop]: trace histogram [122, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:16:16,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-15 02:16:16,039 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:16:16,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:16:16,039 INFO L85 PathProgramCache]: Analyzing trace with hash 202290210, now seen corresponding path program 122 times [2022-02-15 02:16:16,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:16:16,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173466971] [2022-02-15 02:16:16,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:16:16,074 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 02:16:16,145 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:16:16,145 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 02:16:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:16:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:16,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:16:16,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:16:16,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.