/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/loop-new/nested-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 21:03:22,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 21:03:22,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 21:03:22,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 21:03:22,606 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 21:03:22,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 21:03:22,607 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 21:03:22,608 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 21:03:22,608 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 21:03:22,609 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 21:03:22,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 21:03:22,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 21:03:22,616 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 21:03:22,616 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 21:03:22,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 21:03:22,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 21:03:22,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 21:03:22,624 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 21:03:22,625 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 21:03:22,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 21:03:22,628 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 21:03:22,635 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 21:03:22,635 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 21:03:22,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 21:03:22,636 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 21:03:22,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 21:03:22,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 21:03:22,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 21:03:22,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 21:03:22,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 21:03:22,637 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:03:22,637 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 21:03:22,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 21:03:22,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 21:03:22,638 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 21:03:22,638 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 21:03:22,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 21:03:22,794 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 21:03:22,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 21:03:22,796 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 21:03:22,797 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 21:03:22,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/nested-1.i [2022-01-31 21:03:22,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a67ca5bfb/09efd5dbd59a4f7281a2894b4917669e/FLAG4ce91f40a [2022-01-31 21:03:23,202 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 21:03:23,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i [2022-01-31 21:03:23,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a67ca5bfb/09efd5dbd59a4f7281a2894b4917669e/FLAG4ce91f40a [2022-01-31 21:03:23,216 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a67ca5bfb/09efd5dbd59a4f7281a2894b4917669e [2022-01-31 21:03:23,223 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 21:03:23,223 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 21:03:23,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 21:03:23,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 21:03:23,229 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 21:03:23,229 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48d3ac44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23, skipping insertion in model container [2022-01-31 21:03:23,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 21:03:23,246 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 21:03:23,380 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i[891,904] [2022-01-31 21:03:23,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:03:23,400 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 21:03:23,408 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-new/nested-1.i[891,904] [2022-01-31 21:03:23,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 21:03:23,423 INFO L208 MainTranslator]: Completed translation [2022-01-31 21:03:23,423 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23 WrapperNode [2022-01-31 21:03:23,423 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 21:03:23,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 21:03:23,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 21:03:23,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 21:03:23,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,450 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 21:03:23,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 21:03:23,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 21:03:23,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 21:03:23,460 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (1/1) ... [2022-01-31 21:03:23,464 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 21:03:23,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 21:03:23,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 21:03:23,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 21:03:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 21:03:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 21:03:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 21:03:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 21:03:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 21:03:23,539 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 21:03:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 21:03:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 21:03:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 21:03:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 21:03:23,539 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 21:03:23,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 21:03:23,598 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 21:03:23,599 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 21:03:23,677 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 21:03:23,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 21:03:23,681 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 21:03:23,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:23 BoogieIcfgContainer [2022-01-31 21:03:23,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 21:03:23,683 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 21:03:23,683 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 21:03:23,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 21:03:23,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 09:03:23" (1/3) ... [2022-01-31 21:03:23,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b23599f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:23, skipping insertion in model container [2022-01-31 21:03:23,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 09:03:23" (2/3) ... [2022-01-31 21:03:23,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b23599f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 09:03:23, skipping insertion in model container [2022-01-31 21:03:23,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 09:03:23" (3/3) ... [2022-01-31 21:03:23,697 INFO L111 eAbstractionObserver]: Analyzing ICFG nested-1.i [2022-01-31 21:03:23,700 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 21:03:23,700 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 21:03:23,744 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 21:03:23,757 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 21:03:23,758 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 21:03:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 21:03:23,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-31 21:03:23,772 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:23,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:23,772 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:23,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:23,776 INFO L85 PathProgramCache]: Analyzing trace with hash 486387592, now seen corresponding path program 1 times [2022-01-31 21:03:23,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:23,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523694997] [2022-01-31 21:03:23,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:23,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:23,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 21:03:23,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:23,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:23,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:23,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [523694997] [2022-01-31 21:03:23,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [523694997] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:23,945 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:23,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 21:03:23,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197200815] [2022-01-31 21:03:23,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:23,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 21:03:23,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:23,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 21:03:23,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 21:03:23,968 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:24,044 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2022-01-31 21:03:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 21:03:24,046 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-31 21:03:24,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:24,055 INFO L225 Difference]: With dead ends: 46 [2022-01-31 21:03:24,056 INFO L226 Difference]: Without dead ends: 21 [2022-01-31 21:03:24,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:03:24,060 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 36 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:24,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 40 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:03:24,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-01-31 21:03:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-01-31 21:03:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-01-31 21:03:24,088 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-01-31 21:03:24,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:24,088 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-01-31 21:03:24,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-01-31 21:03:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-01-31 21:03:24,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:24,089 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:24,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 21:03:24,089 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:24,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:24,090 INFO L85 PathProgramCache]: Analyzing trace with hash 123963385, now seen corresponding path program 1 times [2022-01-31 21:03:24,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:24,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183493686] [2022-01-31 21:03:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:24,212 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:24,213 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:24,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:24,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:24,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:24,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:24,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183493686] [2022-01-31 21:03:24,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [183493686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:24,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:24,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 21:03:24,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031769533] [2022-01-31 21:03:24,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:24,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 21:03:24,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:24,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 21:03:24,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-01-31 21:03:24,326 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:24,414 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-01-31 21:03:24,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 21:03:24,414 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-01-31 21:03:24,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:24,415 INFO L225 Difference]: With dead ends: 32 [2022-01-31 21:03:24,415 INFO L226 Difference]: Without dead ends: 23 [2022-01-31 21:03:24,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:03:24,421 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:24,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 19 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:03:24,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-01-31 21:03:24,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2022-01-31 21:03:24,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-01-31 21:03:24,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2022-01-31 21:03:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:24,433 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-01-31 21:03:24,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-01-31 21:03:24,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-31 21:03:24,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:24,433 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:24,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 21:03:24,434 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:24,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:24,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1005518441, now seen corresponding path program 1 times [2022-01-31 21:03:24,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:24,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680166678] [2022-01-31 21:03:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:24,510 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:24,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:24,626 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:24,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:24,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:24,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:24,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:24,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680166678] [2022-01-31 21:03:24,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [680166678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:24,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:24,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 21:03:24,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103308414] [2022-01-31 21:03:24,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:24,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 21:03:24,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:24,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 21:03:24,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 21:03:24,762 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:24,839 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-01-31 21:03:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 21:03:24,839 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-01-31 21:03:24,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:24,841 INFO L225 Difference]: With dead ends: 34 [2022-01-31 21:03:24,841 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 21:03:24,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:03:24,847 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:24,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:03:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 21:03:24,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2022-01-31 21:03:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-01-31 21:03:24,854 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2022-01-31 21:03:24,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:24,854 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-01-31 21:03:24,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-01-31 21:03:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 21:03:24,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:24,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:24,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 21:03:24,857 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash 189172661, now seen corresponding path program 2 times [2022-01-31 21:03:24,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:24,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047949242] [2022-01-31 21:03:24,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:24,938 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,077 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,077 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:25,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:25,190 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:25,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047949242] [2022-01-31 21:03:25,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1047949242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:25,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:25,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 21:03:25,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587082322] [2022-01-31 21:03:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:25,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 21:03:25,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:25,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 21:03:25,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-01-31 21:03:25,193 INFO L87 Difference]: Start difference. First operand 21 states and 22 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:25,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:25,271 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-01-31 21:03:25,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 21:03:25,272 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-01-31 21:03:25,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:25,273 INFO L225 Difference]: With dead ends: 36 [2022-01-31 21:03:25,273 INFO L226 Difference]: Without dead ends: 27 [2022-01-31 21:03:25,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:03:25,279 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:25,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:03:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-01-31 21:03:25,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-01-31 21:03:25,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:25,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2022-01-31 21:03:25,288 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2022-01-31 21:03:25,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:25,288 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2022-01-31 21:03:25,289 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, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:25,289 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2022-01-31 21:03:25,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 21:03:25,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:25,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:25,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 21:03:25,291 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:25,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:25,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1531053651, now seen corresponding path program 3 times [2022-01-31 21:03:25,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:25,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456407931] [2022-01-31 21:03:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:25,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,426 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:25,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:25,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:25,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456407931] [2022-01-31 21:03:25,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1456407931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:25,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:25,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 21:03:25,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053020859] [2022-01-31 21:03:25,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:25,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 21:03:25,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:25,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 21:03:25,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2022-01-31 21:03:25,556 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:25,641 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-01-31 21:03:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 21:03:25,641 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-01-31 21:03:25,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:25,642 INFO L225 Difference]: With dead ends: 38 [2022-01-31 21:03:25,642 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 21:03:25,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:03:25,642 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:25,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 21:03:25,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 21:03:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2022-01-31 21:03:25,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:25,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-01-31 21:03:25,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2022-01-31 21:03:25,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:25,647 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-01-31 21:03:25,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:25,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-01-31 21:03:25,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 21:03:25,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:25,647 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:25,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 21:03:25,648 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:25,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:25,648 INFO L85 PathProgramCache]: Analyzing trace with hash -1706471055, now seen corresponding path program 4 times [2022-01-31 21:03:25,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:25,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266455812] [2022-01-31 21:03:25,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:25,707 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:25,780 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:25,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:25,898 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:25,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266455812] [2022-01-31 21:03:25,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1266455812] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:25,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:25,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 21:03:25,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600901723] [2022-01-31 21:03:25,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:25,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 21:03:25,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:25,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 21:03:25,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2022-01-31 21:03:25,900 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:26,019 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-01-31 21:03:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 21:03:26,020 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-01-31 21:03:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:26,020 INFO L225 Difference]: With dead ends: 40 [2022-01-31 21:03:26,020 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 21:03:26,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2022-01-31 21:03:26,021 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:26,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 49 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:03:26,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 21:03:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2022-01-31 21:03:26,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-01-31 21:03:26,025 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2022-01-31 21:03:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:26,025 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-01-31 21:03:26,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-01-31 21:03:26,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 21:03:26,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:26,026 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:26,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 21:03:26,026 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash 883576079, now seen corresponding path program 5 times [2022-01-31 21:03:26,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:26,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226514275] [2022-01-31 21:03:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:26,105 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:26,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:26,193 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:26,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:26,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:26,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:26,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:26,329 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:26,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226514275] [2022-01-31 21:03:26,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226514275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:26,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:26,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 21:03:26,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096759492] [2022-01-31 21:03:26,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:26,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 21:03:26,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 21:03:26,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-01-31 21:03:26,331 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:26,470 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-01-31 21:03:26,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 21:03:26,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-01-31 21:03:26,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:26,471 INFO L225 Difference]: With dead ends: 42 [2022-01-31 21:03:26,471 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 21:03:26,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2022-01-31 21:03:26,472 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:26,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 29 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:03:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 21:03:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2022-01-31 21:03:26,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2022-01-31 21:03:26,476 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2022-01-31 21:03:26,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:26,476 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2022-01-31 21:03:26,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,477 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2022-01-31 21:03:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 21:03:26,477 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:26,477 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:26,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 21:03:26,477 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:26,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:26,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1162159827, now seen corresponding path program 6 times [2022-01-31 21:03:26,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:26,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394323236] [2022-01-31 21:03:26,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:26,536 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:26,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:26,604 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:26,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:26,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:26,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:26,763 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:26,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394323236] [2022-01-31 21:03:26,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394323236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:26,763 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:26,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 21:03:26,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625819592] [2022-01-31 21:03:26,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:26,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 21:03:26,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:26,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 21:03:26,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-01-31 21:03:26,765 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:26,935 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-01-31 21:03:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 21:03:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-01-31 21:03:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:26,936 INFO L225 Difference]: With dead ends: 44 [2022-01-31 21:03:26,936 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 21:03:26,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 9 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2022-01-31 21:03:26,937 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:26,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 34 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:03:26,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 21:03:26,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-01-31 21:03:26,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-01-31 21:03:26,941 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2022-01-31 21:03:26,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:26,942 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-01-31 21:03:26,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:26,942 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-01-31 21:03:26,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 21:03:26,942 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:26,942 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:26,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 21:03:26,943 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:26,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:26,943 INFO L85 PathProgramCache]: Analyzing trace with hash -19343925, now seen corresponding path program 7 times [2022-01-31 21:03:26,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:26,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [228759281] [2022-01-31 21:03:26,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:27,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:27,100 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:27,100 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:27,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:27,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:27,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:27,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:27,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [228759281] [2022-01-31 21:03:27,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [228759281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:27,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:27,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 21:03:27,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98616671] [2022-01-31 21:03:27,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:27,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 21:03:27,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 21:03:27,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-01-31 21:03:27,298 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:27,478 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-01-31 21:03:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 21:03:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-01-31 21:03:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:27,479 INFO L225 Difference]: With dead ends: 46 [2022-01-31 21:03:27,479 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 21:03:27,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2022-01-31 21:03:27,480 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:27,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:03:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 21:03:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2022-01-31 21:03:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:27,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-01-31 21:03:27,484 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2022-01-31 21:03:27,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:27,484 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-01-31 21:03:27,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:27,484 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-01-31 21:03:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 21:03:27,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:27,485 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:27,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 21:03:27,485 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:27,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:27,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1284889879, now seen corresponding path program 8 times [2022-01-31 21:03:27,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:27,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632458944] [2022-01-31 21:03:27,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:27,552 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:27,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:27,626 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:27,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:27,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:27,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:27,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632458944] [2022-01-31 21:03:27,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [632458944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:27,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:27,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 21:03:27,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302054704] [2022-01-31 21:03:27,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:27,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 21:03:27,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:27,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 21:03:27,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-31 21:03:27,835 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:28,052 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-01-31 21:03:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 21:03:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 21:03:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:28,053 INFO L225 Difference]: With dead ends: 48 [2022-01-31 21:03:28,054 INFO L226 Difference]: Without dead ends: 39 [2022-01-31 21:03:28,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 9 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2022-01-31 21:03:28,055 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:28,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 19 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:03:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-01-31 21:03:28,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2022-01-31 21:03:28,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:28,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2022-01-31 21:03:28,060 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2022-01-31 21:03:28,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:28,060 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2022-01-31 21:03:28,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:28,060 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2022-01-31 21:03:28,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 21:03:28,061 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:28,061 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:28,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 21:03:28,061 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:28,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:28,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1998806905, now seen corresponding path program 9 times [2022-01-31 21:03:28,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:28,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373855517] [2022-01-31 21:03:28,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:28,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:28,207 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:28,207 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:28,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:28,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:28,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:28,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:28,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373855517] [2022-01-31 21:03:28,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373855517] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:28,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:28,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 21:03:28,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823127307] [2022-01-31 21:03:28,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:28,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 21:03:28,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:28,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 21:03:28,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-31 21:03:28,456 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:28,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:28,712 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2022-01-31 21:03:28,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 21:03:28,712 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-01-31 21:03:28,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:28,713 INFO L225 Difference]: With dead ends: 50 [2022-01-31 21:03:28,713 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 21:03:28,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 9 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-01-31 21:03:28,713 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:28,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 21:03:28,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 21:03:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2022-01-31 21:03:28,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:28,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-01-31 21:03:28,719 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2022-01-31 21:03:28,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:28,719 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-01-31 21:03:28,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:28,719 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-01-31 21:03:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 21:03:28,719 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:28,719 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:28,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 21:03:28,720 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:28,720 INFO L85 PathProgramCache]: Analyzing trace with hash -878301531, now seen corresponding path program 10 times [2022-01-31 21:03:28,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:28,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822576153] [2022-01-31 21:03:28,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:28,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:28,853 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:28,853 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:28,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:29,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:29,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822576153] [2022-01-31 21:03:29,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [822576153] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:29,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:29,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 21:03:29,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248977048] [2022-01-31 21:03:29,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:29,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 21:03:29,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 21:03:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 21:03:29,924 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:31,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:31,178 INFO L93 Difference]: Finished difference Result 79 states and 93 transitions. [2022-01-31 21:03:31,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 21:03:31,178 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-01-31 21:03:31,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:31,181 INFO L225 Difference]: With dead ends: 79 [2022-01-31 21:03:31,181 INFO L226 Difference]: Without dead ends: 74 [2022-01-31 21:03:31,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=265, Invalid=3767, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:03:31,196 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1627 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:31,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 160 Invalid, 1657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1627 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:31,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-01-31 21:03:31,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2022-01-31 21:03:31,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-01-31 21:03:31,217 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 36 [2022-01-31 21:03:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:31,217 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-01-31 21:03:31,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:31,218 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-01-31 21:03:31,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-01-31 21:03:31,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:31,218 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:31,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 21:03:31,218 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:31,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:31,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2109428413, now seen corresponding path program 11 times [2022-01-31 21:03:31,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:31,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890791729] [2022-01-31 21:03:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:31,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:31,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:31,346 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:31,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:31,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:31,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:31,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:32,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:32,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890791729] [2022-01-31 21:03:32,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1890791729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:32,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:32,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 21:03:32,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365387940] [2022-01-31 21:03:32,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:32,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 21:03:32,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:32,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 21:03:32,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:03:32,471 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:34,112 INFO L93 Difference]: Finished difference Result 108 states and 135 transitions. [2022-01-31 21:03:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 21:03:34,113 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-01-31 21:03:34,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:34,113 INFO L225 Difference]: With dead ends: 108 [2022-01-31 21:03:34,113 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 21:03:34,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=281, Invalid=4275, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:03:34,115 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1807 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:34,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 165 Invalid, 1839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1807 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:03:34,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 21:03:34,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 87. [2022-01-31 21:03:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 82 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:34,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2022-01-31 21:03:34,140 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 38 [2022-01-31 21:03:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:34,140 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2022-01-31 21:03:34,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 32 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2022-01-31 21:03:34,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 21:03:34,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:34,143 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:34,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 21:03:34,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:34,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:34,144 INFO L85 PathProgramCache]: Analyzing trace with hash 830724028, now seen corresponding path program 12 times [2022-01-31 21:03:34,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:34,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134338802] [2022-01-31 21:03:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:34,200 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:34,284 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:34,332 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:34,332 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:34,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:34,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:35,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134338802] [2022-01-31 21:03:35,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [134338802] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:35,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:35,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 21:03:35,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915472113] [2022-01-31 21:03:35,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:35,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 21:03:35,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:35,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 21:03:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 21:03:35,409 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:36,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:36,636 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2022-01-31 21:03:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 21:03:36,637 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 21:03:36,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:36,637 INFO L225 Difference]: With dead ends: 96 [2022-01-31 21:03:36,637 INFO L226 Difference]: Without dead ends: 87 [2022-01-31 21:03:36,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=306, Invalid=3600, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:03:36,639 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 19 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:36,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 165 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1015 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:03:36,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-01-31 21:03:36,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-01-31 21:03:36,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1951219512195121) internal successors, (98), 82 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:36,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2022-01-31 21:03:36,659 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 39 [2022-01-31 21:03:36,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:36,659 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2022-01-31 21:03:36,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.09375) internal successors, (35), 31 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:36,659 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2022-01-31 21:03:36,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 21:03:36,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:36,660 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:36,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 21:03:36,660 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash 188611681, now seen corresponding path program 13 times [2022-01-31 21:03:36,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992943384] [2022-01-31 21:03:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:36,720 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:36,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:36,792 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:36,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:36,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:37,989 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:37,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992943384] [2022-01-31 21:03:37,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [992943384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:37,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:37,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 21:03:37,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948788390] [2022-01-31 21:03:37,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:37,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 21:03:37,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:37,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 21:03:37,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 21:03:37,991 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:39,786 INFO L93 Difference]: Finished difference Result 139 states and 170 transitions. [2022-01-31 21:03:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 21:03:39,786 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-01-31 21:03:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:39,787 INFO L225 Difference]: With dead ends: 139 [2022-01-31 21:03:39,787 INFO L226 Difference]: Without dead ends: 134 [2022-01-31 21:03:39,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=297, Invalid=4815, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:03:39,790 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1994 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 2028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:39,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 170 Invalid, 2028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1994 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:03:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-01-31 21:03:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 116. [2022-01-31 21:03:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 111 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 145 transitions. [2022-01-31 21:03:39,819 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 145 transitions. Word has length 40 [2022-01-31 21:03:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:39,819 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 145 transitions. [2022-01-31 21:03:39,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 145 transitions. [2022-01-31 21:03:39,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-31 21:03:39,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:39,819 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:39,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 21:03:39,820 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:39,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:39,821 INFO L85 PathProgramCache]: Analyzing trace with hash -944477090, now seen corresponding path program 14 times [2022-01-31 21:03:39,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:39,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9562386] [2022-01-31 21:03:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:39,892 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:39,946 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:40,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:40,027 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:40,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:40,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:40,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:40,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:40,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9562386] [2022-01-31 21:03:40,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [9562386] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:40,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:40,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 21:03:40,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209389731] [2022-01-31 21:03:40,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:40,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 21:03:40,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:40,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 21:03:40,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1222, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 21:03:40,739 INFO L87 Difference]: Start difference. First operand 116 states and 145 transitions. Second operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:41,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:41,439 INFO L93 Difference]: Finished difference Result 129 states and 160 transitions. [2022-01-31 21:03:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 21:03:41,439 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-01-31 21:03:41,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:41,440 INFO L225 Difference]: With dead ends: 129 [2022-01-31 21:03:41,440 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 21:03:41,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=4021, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:03:41,441 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1142 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:41,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 165 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1142 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:03:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 21:03:41,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-01-31 21:03:41,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.263157894736842) internal successors, (144), 114 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:41,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 148 transitions. [2022-01-31 21:03:41,473 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 148 transitions. Word has length 41 [2022-01-31 21:03:41,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:41,473 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 148 transitions. [2022-01-31 21:03:41,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 33 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:41,474 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 148 transitions. [2022-01-31 21:03:41,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 21:03:41,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:41,474 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:41,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 21:03:41,475 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:41,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:41,475 INFO L85 PathProgramCache]: Analyzing trace with hash 991951871, now seen corresponding path program 15 times [2022-01-31 21:03:41,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:41,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259202566] [2022-01-31 21:03:41,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:41,517 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:41,618 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:41,618 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:41,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:41,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:42,929 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:42,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259202566] [2022-01-31 21:03:42,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1259202566] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:42,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:42,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 21:03:42,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275651779] [2022-01-31 21:03:42,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:42,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 21:03:42,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:42,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 21:03:42,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:03:42,931 INFO L87 Difference]: Start difference. First operand 119 states and 148 transitions. Second operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:44,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:44,690 INFO L93 Difference]: Finished difference Result 174 states and 220 transitions. [2022-01-31 21:03:44,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 21:03:44,691 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-01-31 21:03:44,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:44,692 INFO L225 Difference]: With dead ends: 174 [2022-01-31 21:03:44,692 INFO L226 Difference]: Without dead ends: 169 [2022-01-31 21:03:44,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=313, Invalid=5387, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:03:44,693 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 2354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:44,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 185 Invalid, 2354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:03:44,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-01-31 21:03:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 150. [2022-01-31 21:03:44,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.3103448275862069) internal successors, (190), 145 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:44,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 194 transitions. [2022-01-31 21:03:44,745 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 194 transitions. Word has length 42 [2022-01-31 21:03:44,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:44,745 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 194 transitions. [2022-01-31 21:03:44,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 36 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 194 transitions. [2022-01-31 21:03:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 21:03:44,746 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:44,746 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:44,746 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 21:03:44,746 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1279631172, now seen corresponding path program 16 times [2022-01-31 21:03:44,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:44,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946821393] [2022-01-31 21:03:44,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:44,832 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:44,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:44,997 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:45,048 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:45,049 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:45,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:45,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:45,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:45,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:45,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946821393] [2022-01-31 21:03:45,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946821393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:45,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:45,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:03:45,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659290922] [2022-01-31 21:03:45,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:45,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:03:45,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:45,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:03:45,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 21:03:45,843 INFO L87 Difference]: Start difference. First operand 150 states and 194 transitions. Second operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:46,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:46,560 INFO L93 Difference]: Finished difference Result 162 states and 208 transitions. [2022-01-31 21:03:46,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:03:46,560 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 21:03:46,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:46,561 INFO L225 Difference]: With dead ends: 162 [2022-01-31 21:03:46,561 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 21:03:46,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=285, Invalid=4545, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:03:46,562 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:46,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 165 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 21:03:46,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 21:03:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2022-01-31 21:03:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.3061224489795917) internal successors, (192), 147 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 196 transitions. [2022-01-31 21:03:46,600 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 196 transitions. Word has length 43 [2022-01-31 21:03:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:46,600 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 196 transitions. [2022-01-31 21:03:46,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:46,600 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 196 transitions. [2022-01-31 21:03:46,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 21:03:46,600 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:46,600 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:46,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 21:03:46,601 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:46,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1810734976, now seen corresponding path program 17 times [2022-01-31 21:03:46,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:46,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786182324] [2022-01-31 21:03:46,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:46,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:46,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:46,755 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:46,755 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:46,755 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:46,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:46,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:46,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:46,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:48,063 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:48,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786182324] [2022-01-31 21:03:48,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [786182324] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:48,063 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:48,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 21:03:48,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708244681] [2022-01-31 21:03:48,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:48,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 21:03:48,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:48,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 21:03:48,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1415, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 21:03:48,065 INFO L87 Difference]: Start difference. First operand 152 states and 196 transitions. Second operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:49,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:49,636 INFO L93 Difference]: Finished difference Result 164 states and 209 transitions. [2022-01-31 21:03:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 21:03:49,637 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 21:03:49,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:49,638 INFO L225 Difference]: With dead ends: 164 [2022-01-31 21:03:49,638 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 21:03:49,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=345, Invalid=4625, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:03:49,639 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1345 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:49,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 175 Invalid, 1384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1345 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:03:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 21:03:49,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2022-01-31 21:03:49,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2380952380952381) internal successors, (182), 147 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:49,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 186 transitions. [2022-01-31 21:03:49,689 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 186 transitions. Word has length 43 [2022-01-31 21:03:49,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:49,689 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 186 transitions. [2022-01-31 21:03:49,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 35 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:49,689 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 186 transitions. [2022-01-31 21:03:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 21:03:49,689 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:49,690 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:49,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 21:03:49,690 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:49,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:49,690 INFO L85 PathProgramCache]: Analyzing trace with hash -92238819, now seen corresponding path program 18 times [2022-01-31 21:03:49,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:49,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702600548] [2022-01-31 21:03:49,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:49,742 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:49,817 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:49,818 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:49,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:49,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:49,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:51,316 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:51,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702600548] [2022-01-31 21:03:51,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702600548] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:51,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:51,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 21:03:51,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200637175] [2022-01-31 21:03:51,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:51,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 21:03:51,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:51,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 21:03:51,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 21:03:51,319 INFO L87 Difference]: Start difference. First operand 152 states and 186 transitions. Second operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:53,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:53,588 INFO L93 Difference]: Finished difference Result 211 states and 263 transitions. [2022-01-31 21:03:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 21:03:53,588 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-01-31 21:03:53,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:53,590 INFO L225 Difference]: With dead ends: 211 [2022-01-31 21:03:53,590 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 21:03:53,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=329, Invalid=5991, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:03:53,594 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2600 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:53,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 195 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2600 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:03:53,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 21:03:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 185. [2022-01-31 21:03:53,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.2833333333333334) internal successors, (231), 180 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 235 transitions. [2022-01-31 21:03:53,674 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 235 transitions. Word has length 44 [2022-01-31 21:03:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:53,674 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 235 transitions. [2022-01-31 21:03:53,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 38 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 235 transitions. [2022-01-31 21:03:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 21:03:53,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:53,675 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:53,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 21:03:53,676 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:53,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:53,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1240156774, now seen corresponding path program 19 times [2022-01-31 21:03:53,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:53,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1563541217] [2022-01-31 21:03:53,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:53,842 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:53,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:54,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:54,050 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:54,050 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:54,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:54,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:54,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:54,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:54,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1563541217] [2022-01-31 21:03:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1563541217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:54,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:54,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:03:54,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539590032] [2022-01-31 21:03:54,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:54,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:03:54,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:03:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1497, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:03:54,839 INFO L87 Difference]: Start difference. First operand 185 states and 235 transitions. Second operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:55,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:55,873 INFO L93 Difference]: Finished difference Result 197 states and 249 transitions. [2022-01-31 21:03:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:03:55,874 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 21:03:55,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:55,874 INFO L225 Difference]: With dead ends: 197 [2022-01-31 21:03:55,874 INFO L226 Difference]: Without dead ends: 188 [2022-01-31 21:03:55,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=345, Invalid=5057, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:03:55,876 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:55,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 175 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:03:55,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-01-31 21:03:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-01-31 21:03:55,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.2802197802197801) internal successors, (233), 182 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:55,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 237 transitions. [2022-01-31 21:03:55,935 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 237 transitions. Word has length 45 [2022-01-31 21:03:55,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:55,935 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 237 transitions. [2022-01-31 21:03:55,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:55,936 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 237 transitions. [2022-01-31 21:03:55,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-01-31 21:03:55,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:55,936 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 21:03:55,936 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1060907998, now seen corresponding path program 20 times [2022-01-31 21:03:55,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189427987] [2022-01-31 21:03:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:56,002 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:56,040 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:56,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:56,083 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:03:56,083 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:56,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:56,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:56,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189427987] [2022-01-31 21:03:56,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1189427987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:56,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:56,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 21:03:56,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061802740] [2022-01-31 21:03:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:56,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 21:03:56,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 21:03:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1518, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 21:03:56,695 INFO L87 Difference]: Start difference. First operand 187 states and 237 transitions. Second operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:57,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:03:57,601 INFO L93 Difference]: Finished difference Result 201 states and 253 transitions. [2022-01-31 21:03:57,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 21:03:57,602 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-01-31 21:03:57,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:03:57,603 INFO L225 Difference]: With dead ends: 201 [2022-01-31 21:03:57,603 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 21:03:57,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=5101, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:03:57,606 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:03:57,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 185 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:03:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 21:03:57,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 190. [2022-01-31 21:03:57,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2756756756756757) internal successors, (236), 185 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2022-01-31 21:03:57,669 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 45 [2022-01-31 21:03:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:03:57,669 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2022-01-31 21:03:57,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:03:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2022-01-31 21:03:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 21:03:57,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:03:57,669 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:03:57,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 21:03:57,670 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:03:57,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:03:57,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1677561019, now seen corresponding path program 21 times [2022-01-31 21:03:57,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:03:57,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731643824] [2022-01-31 21:03:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:03:57,715 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:57,792 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:03:57,792 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:03:57,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:03:57,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:57,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:03:57,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:03:57,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:03:59,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:03:59,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731643824] [2022-01-31 21:03:59,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1731643824] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:03:59,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:03:59,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 21:03:59,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920005721] [2022-01-31 21:03:59,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:03:59,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 21:03:59,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:03:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 21:03:59,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:03:59,158 INFO L87 Difference]: Start difference. First operand 190 states and 240 transitions. Second operand has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:01,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:01,314 INFO L93 Difference]: Finished difference Result 252 states and 321 transitions. [2022-01-31 21:04:01,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 21:04:01,314 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-01-31 21:04:01,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:01,315 INFO L225 Difference]: With dead ends: 252 [2022-01-31 21:04:01,315 INFO L226 Difference]: Without dead ends: 247 [2022-01-31 21:04:01,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=345, Invalid=6627, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:04:01,316 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2971 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 3008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:01,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 210 Invalid, 3008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2971 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:04:01,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-01-31 21:04:01,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 225. [2022-01-31 21:04:01,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.309090909090909) internal successors, (288), 220 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:01,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 292 transitions. [2022-01-31 21:04:01,380 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 292 transitions. Word has length 46 [2022-01-31 21:04:01,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:01,380 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 292 transitions. [2022-01-31 21:04:01,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 292 transitions. [2022-01-31 21:04:01,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:04:01,380 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:01,380 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:01,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 21:04:01,381 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:01,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1959965960, now seen corresponding path program 22 times [2022-01-31 21:04:01,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:01,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865118123] [2022-01-31 21:04:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:01,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:01,518 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:01,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:01,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:01,699 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:01,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:01,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:03,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:03,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865118123] [2022-01-31 21:04:03,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [865118123] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:03,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:03,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:04:03,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422963462] [2022-01-31 21:04:03,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:03,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:04:03,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:03,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:04:03,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1725, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 21:04:03,215 INFO L87 Difference]: Start difference. First operand 225 states and 292 transitions. Second operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:04,864 INFO L93 Difference]: Finished difference Result 236 states and 304 transitions. [2022-01-31 21:04:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:04:04,864 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:04:04,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:04,865 INFO L225 Difference]: With dead ends: 236 [2022-01-31 21:04:04,865 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 21:04:04,866 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=403, Invalid=5759, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:04:04,866 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:04,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 195 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:04:04,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 21:04:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 218. [2022-01-31 21:04:04,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.272300469483568) internal successors, (271), 213 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 275 transitions. [2022-01-31 21:04:04,938 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 275 transitions. Word has length 47 [2022-01-31 21:04:04,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:04,938 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 275 transitions. [2022-01-31 21:04:04,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 275 transitions. [2022-01-31 21:04:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:04:04,939 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:04,939 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:04,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 21:04:04,939 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:04,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:04,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1500584064, now seen corresponding path program 23 times [2022-01-31 21:04:04,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:04,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340241593] [2022-01-31 21:04:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:05,031 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:05,083 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:05,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:05,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:05,239 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:05,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:05,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:06,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:06,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340241593] [2022-01-31 21:04:06,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340241593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:06,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:06,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:04:06,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806469936] [2022-01-31 21:04:06,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:06,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:04:06,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:06,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:04:06,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:04:06,150 INFO L87 Difference]: Start difference. First operand 218 states and 275 transitions. Second operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:07,350 INFO L93 Difference]: Finished difference Result 232 states and 291 transitions. [2022-01-31 21:04:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:04:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:04:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:07,351 INFO L225 Difference]: With dead ends: 232 [2022-01-31 21:04:07,351 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 21:04:07,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1195 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=369, Invalid=5637, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:04:07,352 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 1732 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:07,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 195 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1732 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:04:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 21:04:07,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 220. [2022-01-31 21:04:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.2697674418604652) internal successors, (273), 215 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:07,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 277 transitions. [2022-01-31 21:04:07,415 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 277 transitions. Word has length 47 [2022-01-31 21:04:07,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:07,415 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 277 transitions. [2022-01-31 21:04:07,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:07,416 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 277 transitions. [2022-01-31 21:04:07,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 21:04:07,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:07,416 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:07,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 21:04:07,416 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:07,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2031687868, now seen corresponding path program 24 times [2022-01-31 21:04:07,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:07,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [456264402] [2022-01-31 21:04:07,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:07,491 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:07,537 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:07,573 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:07,574 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:07,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:07,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:07,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:08,331 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:08,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [456264402] [2022-01-31 21:04:08,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [456264402] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:08,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:08,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 21:04:08,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186016357] [2022-01-31 21:04:08,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:08,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 21:04:08,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:08,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 21:04:08,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 21:04:08,333 INFO L87 Difference]: Start difference. First operand 220 states and 277 transitions. Second operand has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:09,483 INFO L93 Difference]: Finished difference Result 235 states and 294 transitions. [2022-01-31 21:04:09,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 21:04:09,483 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 21:04:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:09,484 INFO L225 Difference]: With dead ends: 235 [2022-01-31 21:04:09,484 INFO L226 Difference]: Without dead ends: 226 [2022-01-31 21:04:09,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1024 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=317, Invalid=5689, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:04:09,485 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:09,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 190 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:04:09,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-01-31 21:04:09,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2022-01-31 21:04:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.2660550458715596) internal successors, (276), 218 states have internal predecessors, (276), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:09,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 280 transitions. [2022-01-31 21:04:09,548 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 280 transitions. Word has length 47 [2022-01-31 21:04:09,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:09,549 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 280 transitions. [2022-01-31 21:04:09,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.075) internal successors, (43), 39 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:09,549 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 280 transitions. [2022-01-31 21:04:09,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 21:04:09,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:09,549 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:09,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 21:04:09,549 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:09,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:09,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1648156121, now seen corresponding path program 25 times [2022-01-31 21:04:09,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:09,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431016423] [2022-01-31 21:04:09,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:09,599 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:09,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:09,676 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:09,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:09,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:09,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:09,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:10,967 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:10,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431016423] [2022-01-31 21:04:10,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [431016423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:10,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:10,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 21:04:10,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720070054] [2022-01-31 21:04:10,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:10,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 21:04:10,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:10,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 21:04:10,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:04:10,969 INFO L87 Difference]: Start difference. First operand 223 states and 280 transitions. Second operand has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:13,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:13,673 INFO L93 Difference]: Finished difference Result 289 states and 366 transitions. [2022-01-31 21:04:13,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 21:04:13,674 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-01-31 21:04:13,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:13,675 INFO L225 Difference]: With dead ends: 289 [2022-01-31 21:04:13,675 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 21:04:13,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1300 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=361, Invalid=7295, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 21:04:13,676 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 3215 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:13,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 215 Invalid, 3255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3215 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:04:13,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 21:04:13,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 260. [2022-01-31 21:04:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.2980392156862746) internal successors, (331), 255 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:13,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 335 transitions. [2022-01-31 21:04:13,763 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 335 transitions. Word has length 48 [2022-01-31 21:04:13,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:13,763 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 335 transitions. [2022-01-31 21:04:13,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 42 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:13,763 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 335 transitions. [2022-01-31 21:04:13,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 21:04:13,764 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:13,764 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:13,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 21:04:13,765 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:13,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:13,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1172478814, now seen corresponding path program 26 times [2022-01-31 21:04:13,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:13,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516513006] [2022-01-31 21:04:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:13,873 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:13,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:13,981 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:14,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:14,018 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:14,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:14,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:15,863 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:15,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516513006] [2022-01-31 21:04:15,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [516513006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:15,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:15,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:04:15,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417433955] [2022-01-31 21:04:15,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:15,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:04:15,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:15,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:04:15,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1897, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 21:04:15,865 INFO L87 Difference]: Start difference. First operand 260 states and 335 transitions. Second operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:17,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:17,670 INFO L93 Difference]: Finished difference Result 276 states and 353 transitions. [2022-01-31 21:04:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:04:17,670 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 21:04:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:17,671 INFO L225 Difference]: With dead ends: 276 [2022-01-31 21:04:17,671 INFO L226 Difference]: Without dead ends: 267 [2022-01-31 21:04:17,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=397, Invalid=6083, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 21:04:17,672 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1728 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:17,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 200 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1728 Invalid, 0 Unknown, 48 Unchecked, 0.7s Time] [2022-01-31 21:04:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-01-31 21:04:17,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 255. [2022-01-31 21:04:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.264) internal successors, (316), 250 states have internal predecessors, (316), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 320 transitions. [2022-01-31 21:04:17,760 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 320 transitions. Word has length 49 [2022-01-31 21:04:17,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:17,760 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 320 transitions. [2022-01-31 21:04:17,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:17,760 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 320 transitions. [2022-01-31 21:04:17,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 21:04:17,761 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:17,761 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:17,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 21:04:17,761 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:17,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1882831394, now seen corresponding path program 27 times [2022-01-31 21:04:17,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:17,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949739178] [2022-01-31 21:04:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:17,860 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:17,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:18,004 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:18,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:18,046 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:18,047 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:18,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:18,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:18,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:18,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:18,904 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949739178] [2022-01-31 21:04:18,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1949739178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:18,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:18,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:04:18,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566927516] [2022-01-31 21:04:18,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:18,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:04:18,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:04:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1846, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:04:18,905 INFO L87 Difference]: Start difference. First operand 255 states and 320 transitions. Second operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:19,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:19,998 INFO L93 Difference]: Finished difference Result 270 states and 337 transitions. [2022-01-31 21:04:19,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:04:19,998 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 21:04:19,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:19,999 INFO L225 Difference]: With dead ends: 270 [2022-01-31 21:04:19,999 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 21:04:20,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=6309, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:04:20,000 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 1980 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:20,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 205 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1980 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 21:04:20,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 21:04:20,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 257. [2022-01-31 21:04:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.2619047619047619) internal successors, (318), 252 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 322 transitions. [2022-01-31 21:04:20,087 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 322 transitions. Word has length 49 [2022-01-31 21:04:20,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:20,087 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 322 transitions. [2022-01-31 21:04:20,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:20,087 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 322 transitions. [2022-01-31 21:04:20,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-31 21:04:20,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:20,088 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:20,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 21:04:20,088 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:20,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:20,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1351727590, now seen corresponding path program 28 times [2022-01-31 21:04:20,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:20,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371864983] [2022-01-31 21:04:20,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:20,134 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:20,176 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:20,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:20,208 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:20,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:20,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:20,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:20,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:20,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:20,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371864983] [2022-01-31 21:04:20,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371864983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:20,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:20,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 21:04:20,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282168754] [2022-01-31 21:04:20,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:20,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 21:04:20,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:20,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 21:04:20,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1846, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 21:04:20,865 INFO L87 Difference]: Start difference. First operand 257 states and 322 transitions. Second operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:22,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:22,191 INFO L93 Difference]: Finished difference Result 273 states and 340 transitions. [2022-01-31 21:04:22,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 21:04:22,192 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-01-31 21:04:22,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:22,192 INFO L225 Difference]: With dead ends: 273 [2022-01-31 21:04:22,192 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 21:04:22,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=333, Invalid=6309, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:04:22,193 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:22,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 210 Invalid, 2142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2110 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:04:22,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 21:04:22,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2022-01-31 21:04:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.2588235294117647) internal successors, (321), 255 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 325 transitions. [2022-01-31 21:04:22,272 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 325 transitions. Word has length 49 [2022-01-31 21:04:22,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:22,273 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 325 transitions. [2022-01-31 21:04:22,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 41 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:22,273 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 325 transitions. [2022-01-31 21:04:22,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 21:04:22,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:22,273 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:22,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 21:04:22,273 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:22,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:22,274 INFO L85 PathProgramCache]: Analyzing trace with hash -840147081, now seen corresponding path program 29 times [2022-01-31 21:04:22,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:22,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593853899] [2022-01-31 21:04:22,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:22,313 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:22,386 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:22,387 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:22,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:22,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:24,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:24,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593853899] [2022-01-31 21:04:24,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [593853899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:24,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:24,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 21:04:24,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985985321] [2022-01-31 21:04:24,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:24,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 21:04:24,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:24,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 21:04:24,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:04:24,184 INFO L87 Difference]: Start difference. First operand 260 states and 325 transitions. Second operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:27,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:27,174 INFO L93 Difference]: Finished difference Result 330 states and 416 transitions. [2022-01-31 21:04:27,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 21:04:27,174 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-01-31 21:04:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:27,175 INFO L225 Difference]: With dead ends: 330 [2022-01-31 21:04:27,175 INFO L226 Difference]: Without dead ends: 325 [2022-01-31 21:04:27,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=377, Invalid=7995, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 21:04:27,176 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3544 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 3585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 3544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:27,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 225 Invalid, 3585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 3544 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:04:27,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-01-31 21:04:27,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 299. [2022-01-31 21:04:27,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2891156462585034) internal successors, (379), 294 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:27,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 383 transitions. [2022-01-31 21:04:27,281 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 383 transitions. Word has length 50 [2022-01-31 21:04:27,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:27,281 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 383 transitions. [2022-01-31 21:04:27,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 44 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 383 transitions. [2022-01-31 21:04:27,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 21:04:27,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:27,282 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:27,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 21:04:27,282 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:27,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:27,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1344490880, now seen corresponding path program 30 times [2022-01-31 21:04:27,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637277515] [2022-01-31 21:04:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:27,406 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:27,467 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:27,554 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:27,603 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:27,603 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:27,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:27,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:27,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:28,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637277515] [2022-01-31 21:04:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1637277515] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:28,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:28,979 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 21:04:28,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954344560] [2022-01-31 21:04:28,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:28,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 21:04:28,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 21:04:28,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2074, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 21:04:28,980 INFO L87 Difference]: Start difference. First operand 299 states and 383 transitions. Second operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:30,601 INFO L93 Difference]: Finished difference Result 316 states and 401 transitions. [2022-01-31 21:04:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:04:30,601 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 21:04:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:30,602 INFO L225 Difference]: With dead ends: 316 [2022-01-31 21:04:30,602 INFO L226 Difference]: Without dead ends: 307 [2022-01-31 21:04:30,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=438, Invalid=7044, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 21:04:30,603 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2003 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2003 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:30,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 200 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2003 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:04:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-01-31 21:04:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 294. [2022-01-31 21:04:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 289 states have (on average 1.259515570934256) internal successors, (364), 289 states have internal predecessors, (364), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:30,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 368 transitions. [2022-01-31 21:04:30,707 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 368 transitions. Word has length 51 [2022-01-31 21:04:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:30,707 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 368 transitions. [2022-01-31 21:04:30,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 368 transitions. [2022-01-31 21:04:30,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 21:04:30,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:30,708 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:30,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 21:04:30,708 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:30,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:30,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2054843460, now seen corresponding path program 31 times [2022-01-31 21:04:30,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:30,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356610178] [2022-01-31 21:04:30,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:30,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:30,882 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:30,953 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:31,005 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:31,005 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:31,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:31,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:31,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:31,702 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:31,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356610178] [2022-01-31 21:04:31,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [356610178] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:31,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:31,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 21:04:31,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400627638] [2022-01-31 21:04:31,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:31,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 21:04:31,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:31,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 21:04:31,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1993, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:04:31,704 INFO L87 Difference]: Start difference. First operand 294 states and 368 transitions. Second operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:33,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:33,089 INFO L93 Difference]: Finished difference Result 310 states and 386 transitions. [2022-01-31 21:04:33,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:04:33,090 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 21:04:33,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:33,091 INFO L225 Difference]: With dead ends: 310 [2022-01-31 21:04:33,091 INFO L226 Difference]: Without dead ends: 301 [2022-01-31 21:04:33,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=409, Invalid=6901, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:04:33,092 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2191 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:33,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 210 Invalid, 2223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2191 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:04:33,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-01-31 21:04:33,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 296. [2022-01-31 21:04:33,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.2577319587628866) internal successors, (366), 291 states have internal predecessors, (366), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:33,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 370 transitions. [2022-01-31 21:04:33,191 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 370 transitions. Word has length 51 [2022-01-31 21:04:33,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:33,191 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 370 transitions. [2022-01-31 21:04:33,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:33,191 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 370 transitions. [2022-01-31 21:04:33,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 21:04:33,191 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:33,191 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:33,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 21:04:33,192 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1523739656, now seen corresponding path program 32 times [2022-01-31 21:04:33,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:33,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405428203] [2022-01-31 21:04:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:33,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:33,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:33,390 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:33,391 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:33,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:33,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:33,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:34,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:34,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405428203] [2022-01-31 21:04:34,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [405428203] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:34,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:34,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 21:04:34,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526022349] [2022-01-31 21:04:34,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:34,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 21:04:34,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 21:04:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2022, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 21:04:34,095 INFO L87 Difference]: Start difference. First operand 296 states and 370 transitions. Second operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:35,396 INFO L93 Difference]: Finished difference Result 313 states and 389 transitions. [2022-01-31 21:04:35,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 21:04:35,396 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 21:04:35,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:35,397 INFO L225 Difference]: With dead ends: 313 [2022-01-31 21:04:35,397 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 21:04:35,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=349, Invalid=6961, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 21:04:35,398 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:35,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 210 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:04:35,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 21:04:35,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 299. [2022-01-31 21:04:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.2551020408163265) internal successors, (369), 294 states have internal predecessors, (369), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:35,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 373 transitions. [2022-01-31 21:04:35,515 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 373 transitions. Word has length 51 [2022-01-31 21:04:35,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:35,516 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 373 transitions. [2022-01-31 21:04:35,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 43 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 373 transitions. [2022-01-31 21:04:35,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 21:04:35,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:35,535 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:35,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 21:04:35,535 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:35,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:35,536 INFO L85 PathProgramCache]: Analyzing trace with hash 197259669, now seen corresponding path program 33 times [2022-01-31 21:04:35,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:35,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696549312] [2022-01-31 21:04:35,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:35,586 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:35,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:35,675 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:35,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:35,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:35,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:37,300 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:37,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696549312] [2022-01-31 21:04:37,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1696549312] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:37,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:37,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 21:04:37,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590150447] [2022-01-31 21:04:37,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:37,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 21:04:37,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:37,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 21:04:37,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2306, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:04:37,301 INFO L87 Difference]: Start difference. First operand 299 states and 373 transitions. Second operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:39,863 INFO L93 Difference]: Finished difference Result 373 states and 469 transitions. [2022-01-31 21:04:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 21:04:39,863 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-01-31 21:04:39,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:39,864 INFO L225 Difference]: With dead ends: 373 [2022-01-31 21:04:39,864 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 21:04:39,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=393, Invalid=8727, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 21:04:39,865 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 3889 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 3931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 3889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:39,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 235 Invalid, 3931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 3889 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:04:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 21:04:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 340. [2022-01-31 21:04:39,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.2835820895522387) internal successors, (430), 335 states have internal predecessors, (430), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:39,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 434 transitions. [2022-01-31 21:04:39,988 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 434 transitions. Word has length 52 [2022-01-31 21:04:39,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:39,988 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 434 transitions. [2022-01-31 21:04:39,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:39,988 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 434 transitions. [2022-01-31 21:04:39,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:04:39,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:39,989 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:39,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 21:04:39,989 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:39,989 INFO L85 PathProgramCache]: Analyzing trace with hash -855638238, now seen corresponding path program 34 times [2022-01-31 21:04:39,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:39,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608143565] [2022-01-31 21:04:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:40,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:40,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:40,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:40,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:40,243 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:40,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:40,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:40,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:40,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:41,475 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:41,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608143565] [2022-01-31 21:04:41,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [608143565] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:41,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:41,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:04:41,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954204107] [2022-01-31 21:04:41,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:41,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:04:41,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:41,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:04:41,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2206, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:04:41,477 INFO L87 Difference]: Start difference. First operand 340 states and 434 transitions. Second operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:43,260 INFO L93 Difference]: Finished difference Result 356 states and 452 transitions. [2022-01-31 21:04:43,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:04:43,261 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:04:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:43,262 INFO L225 Difference]: With dead ends: 356 [2022-01-31 21:04:43,262 INFO L226 Difference]: Without dead ends: 347 [2022-01-31 21:04:43,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1333 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=365, Invalid=7645, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:04:43,263 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2498 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:43,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 230 Invalid, 2530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2498 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:04:43,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-01-31 21:04:43,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 342. [2022-01-31 21:04:43,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 337 states have (on average 1.281899109792285) internal successors, (432), 337 states have internal predecessors, (432), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:43,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 436 transitions. [2022-01-31 21:04:43,373 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 436 transitions. Word has length 53 [2022-01-31 21:04:43,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:43,373 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 436 transitions. [2022-01-31 21:04:43,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:43,373 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 436 transitions. [2022-01-31 21:04:43,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:04:43,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:43,374 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:43,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 21:04:43,374 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:43,374 INFO L85 PathProgramCache]: Analyzing trace with hash -145285658, now seen corresponding path program 35 times [2022-01-31 21:04:43,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:43,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [93473115] [2022-01-31 21:04:43,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:43,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:43,519 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:43,582 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:43,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:43,628 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:43,628 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:43,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:44,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [93473115] [2022-01-31 21:04:44,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [93473115] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:44,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:44,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:04:44,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358424303] [2022-01-31 21:04:44,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:44,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:04:44,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:44,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:04:44,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2175, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 21:04:44,638 INFO L87 Difference]: Start difference. First operand 342 states and 436 transitions. Second operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:45,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:45,832 INFO L93 Difference]: Finished difference Result 358 states and 454 transitions. [2022-01-31 21:04:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:04:45,833 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:04:45,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:45,834 INFO L225 Difference]: With dead ends: 358 [2022-01-31 21:04:45,834 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 21:04:45,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=7581, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 21:04:45,835 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2527 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:45,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 225 Invalid, 2560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:04:45,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 21:04:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 344. [2022-01-31 21:04:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.28023598820059) internal successors, (434), 339 states have internal predecessors, (434), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:45,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 438 transitions. [2022-01-31 21:04:45,967 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 438 transitions. Word has length 53 [2022-01-31 21:04:45,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:45,967 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 438 transitions. [2022-01-31 21:04:45,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:45,967 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 438 transitions. [2022-01-31 21:04:45,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-01-31 21:04:45,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:45,968 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:45,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 21:04:45,968 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:45,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:45,968 INFO L85 PathProgramCache]: Analyzing trace with hash -676389462, now seen corresponding path program 36 times [2022-01-31 21:04:45,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:45,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078750896] [2022-01-31 21:04:45,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:46,023 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:46,112 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:46,149 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:46,149 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:46,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:46,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:46,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:46,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:47,589 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:47,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078750896] [2022-01-31 21:04:47,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078750896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:47,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:47,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 21:04:47,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546536343] [2022-01-31 21:04:47,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:47,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 21:04:47,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:47,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 21:04:47,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=2265, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 21:04:47,591 INFO L87 Difference]: Start difference. First operand 344 states and 438 transitions. Second operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:49,533 INFO L93 Difference]: Finished difference Result 365 states and 460 transitions. [2022-01-31 21:04:49,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 21:04:49,534 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-01-31 21:04:49,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:49,535 INFO L225 Difference]: With dead ends: 365 [2022-01-31 21:04:49,535 INFO L226 Difference]: Without dead ends: 356 [2022-01-31 21:04:49,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1331 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=445, Invalid=7745, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 21:04:49,536 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:49,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 235 Invalid, 2773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:04:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-01-31 21:04:49,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 344. [2022-01-31 21:04:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 339 states have (on average 1.2507374631268438) internal successors, (424), 339 states have internal predecessors, (424), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 428 transitions. [2022-01-31 21:04:49,652 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 428 transitions. Word has length 53 [2022-01-31 21:04:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:49,653 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 428 transitions. [2022-01-31 21:04:49,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 45 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:49,653 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 428 transitions. [2022-01-31 21:04:49,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 21:04:49,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:49,653 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:49,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 21:04:49,653 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:49,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:49,654 INFO L85 PathProgramCache]: Analyzing trace with hash 712733747, now seen corresponding path program 37 times [2022-01-31 21:04:49,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:49,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507017962] [2022-01-31 21:04:49,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:49,698 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:49,747 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:49,748 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:04:49,748 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:49,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:51,770 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:51,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507017962] [2022-01-31 21:04:51,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [507017962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:51,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:51,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 21:04:51,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086766999] [2022-01-31 21:04:51,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:51,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 21:04:51,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 21:04:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2502, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:04:51,772 INFO L87 Difference]: Start difference. First operand 344 states and 428 transitions. Second operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:54,736 INFO L93 Difference]: Finished difference Result 422 states and 529 transitions. [2022-01-31 21:04:54,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 21:04:54,736 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-01-31 21:04:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:54,737 INFO L225 Difference]: With dead ends: 422 [2022-01-31 21:04:54,737 INFO L226 Difference]: Without dead ends: 417 [2022-01-31 21:04:54,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=409, Invalid=9491, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 21:04:54,738 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 4335 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 4376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:54,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 250 Invalid, 4376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4335 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:04:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-31 21:04:54,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 387. [2022-01-31 21:04:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 382 states have (on average 1.2774869109947644) internal successors, (488), 382 states have internal predecessors, (488), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:54,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 492 transitions. [2022-01-31 21:04:54,868 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 492 transitions. Word has length 54 [2022-01-31 21:04:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:54,868 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 492 transitions. [2022-01-31 21:04:54,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 492 transitions. [2022-01-31 21:04:54,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 21:04:54,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:54,869 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:54,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 21:04:54,869 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:54,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:54,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1804840320, now seen corresponding path program 38 times [2022-01-31 21:04:54,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:54,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891807741] [2022-01-31 21:04:54,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:54,966 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:55,008 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:55,095 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:55,153 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:55,153 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:55,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:55,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:55,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:56,136 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:56,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891807741] [2022-01-31 21:04:56,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [891807741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:56,136 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:56,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:04:56,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394955288] [2022-01-31 21:04:56,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:56,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:04:56,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:56,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:04:56,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2398, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:04:56,138 INFO L87 Difference]: Start difference. First operand 387 states and 492 transitions. Second operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:04:57,456 INFO L93 Difference]: Finished difference Result 403 states and 510 transitions. [2022-01-31 21:04:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 21:04:57,456 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 21:04:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:04:57,457 INFO L225 Difference]: With dead ends: 403 [2022-01-31 21:04:57,457 INFO L226 Difference]: Without dead ends: 394 [2022-01-31 21:04:57,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1442 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=381, Invalid=8361, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:04:57,458 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 2703 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 2735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:04:57,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 240 Invalid, 2735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2703 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:04:57,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-01-31 21:04:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 389. [2022-01-31 21:04:57,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.2760416666666667) internal successors, (490), 384 states have internal predecessors, (490), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 494 transitions. [2022-01-31 21:04:57,599 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 494 transitions. Word has length 55 [2022-01-31 21:04:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:04:57,599 INFO L470 AbstractCegarLoop]: Abstraction has 389 states and 494 transitions. [2022-01-31 21:04:57,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:04:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 494 transitions. [2022-01-31 21:04:57,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 21:04:57,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:04:57,600 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:04:57,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 21:04:57,600 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:04:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:04:57,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2055811004, now seen corresponding path program 39 times [2022-01-31 21:04:57,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:04:57,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1694059018] [2022-01-31 21:04:57,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:04:57,677 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:57,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:57,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:57,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:04:57,804 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:04:57,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:04:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:57,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:04:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:04:57,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:04:58,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:04:58,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1694059018] [2022-01-31 21:04:58,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1694059018] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:04:58,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:04:58,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:04:58,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044682513] [2022-01-31 21:04:58,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:04:58,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:04:58,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:04:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:04:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2398, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 21:04:58,842 INFO L87 Difference]: Start difference. First operand 389 states and 494 transitions. Second operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:00,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:00,241 INFO L93 Difference]: Finished difference Result 405 states and 512 transitions. [2022-01-31 21:05:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 21:05:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 21:05:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:00,244 INFO L225 Difference]: With dead ends: 405 [2022-01-31 21:05:00,244 INFO L226 Difference]: Without dead ends: 396 [2022-01-31 21:05:00,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=381, Invalid=8361, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 21:05:00,245 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2734 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:00,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 235 Invalid, 2767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:05:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-01-31 21:05:00,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 391. [2022-01-31 21:05:00,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 386 states have (on average 1.2746113989637307) internal successors, (492), 386 states have internal predecessors, (492), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 496 transitions. [2022-01-31 21:05:00,384 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 496 transitions. Word has length 55 [2022-01-31 21:05:00,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:00,384 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 496 transitions. [2022-01-31 21:05:00,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 496 transitions. [2022-01-31 21:05:00,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 21:05:00,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:00,384 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:00,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 21:05:00,385 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:00,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1876562228, now seen corresponding path program 40 times [2022-01-31 21:05:00,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:00,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423239509] [2022-01-31 21:05:00,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:00,426 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:00,472 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:00,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:00,500 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:00,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:00,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:02,192 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:02,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423239509] [2022-01-31 21:05:02,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1423239509] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:02,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:02,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 21:05:02,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079324927] [2022-01-31 21:05:02,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:02,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 21:05:02,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:02,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 21:05:02,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2459, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 21:05:02,194 INFO L87 Difference]: Start difference. First operand 391 states and 496 transitions. Second operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:05,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:05,036 INFO L93 Difference]: Finished difference Result 415 states and 522 transitions. [2022-01-31 21:05:05,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 21:05:05,037 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 21:05:05,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:05,038 INFO L225 Difference]: With dead ends: 415 [2022-01-31 21:05:05,038 INFO L226 Difference]: Without dead ends: 406 [2022-01-31 21:05:05,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=445, Invalid=8111, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 21:05:05,039 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2884 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:05,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 245 Invalid, 2989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2884 Invalid, 0 Unknown, 59 Unchecked, 1.1s Time] [2022-01-31 21:05:05,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2022-01-31 21:05:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 391. [2022-01-31 21:05:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 386 states have (on average 1.2487046632124352) internal successors, (482), 386 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:05,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 486 transitions. [2022-01-31 21:05:05,179 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 486 transitions. Word has length 55 [2022-01-31 21:05:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:05,179 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 486 transitions. [2022-01-31 21:05:05,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.0625) internal successors, (51), 47 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:05,180 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 486 transitions. [2022-01-31 21:05:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 21:05:05,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:05,180 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:05,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 21:05:05,180 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:05,180 INFO L85 PathProgramCache]: Analyzing trace with hash -2132883631, now seen corresponding path program 41 times [2022-01-31 21:05:05,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:05,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535309826] [2022-01-31 21:05:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:05,227 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:05,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:05,305 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:05:05,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:05,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:05,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:07,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:07,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535309826] [2022-01-31 21:05:07,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1535309826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:07,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:07,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 21:05:07,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983398019] [2022-01-31 21:05:07,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:07,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 21:05:07,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 21:05:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:05:07,494 INFO L87 Difference]: Start difference. First operand 391 states and 486 transitions. Second operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:11,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:11,038 INFO L93 Difference]: Finished difference Result 473 states and 592 transitions. [2022-01-31 21:05:11,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 21:05:11,039 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-01-31 21:05:11,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:11,040 INFO L225 Difference]: With dead ends: 473 [2022-01-31 21:05:11,040 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 21:05:11,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=425, Invalid=10287, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 21:05:11,041 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 58 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 4624 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 4666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 4624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:11,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 255 Invalid, 4666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 4624 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:05:11,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 21:05:11,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 436. [2022-01-31 21:05:11,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.2737819025522041) internal successors, (549), 431 states have internal predecessors, (549), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:11,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 553 transitions. [2022-01-31 21:05:11,212 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 553 transitions. Word has length 56 [2022-01-31 21:05:11,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:11,212 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 553 transitions. [2022-01-31 21:05:11,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:11,213 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 553 transitions. [2022-01-31 21:05:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 21:05:11,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:11,213 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:11,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 21:05:11,213 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:11,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:11,214 INFO L85 PathProgramCache]: Analyzing trace with hash 839992926, now seen corresponding path program 42 times [2022-01-31 21:05:11,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:11,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454734832] [2022-01-31 21:05:11,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:11,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:11,353 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:11,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:11,437 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:11,438 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:11,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:11,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:12,789 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:12,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454734832] [2022-01-31 21:05:12,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [454734832] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:12,789 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:12,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 21:05:12,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303237114] [2022-01-31 21:05:12,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:12,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 21:05:12,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:12,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 21:05:12,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2598, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:05:12,790 INFO L87 Difference]: Start difference. First operand 436 states and 553 transitions. Second operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:14,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:14,337 INFO L93 Difference]: Finished difference Result 452 states and 571 transitions. [2022-01-31 21:05:14,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:05:14,338 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 21:05:14,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:14,339 INFO L225 Difference]: With dead ends: 452 [2022-01-31 21:05:14,339 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 21:05:14,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=397, Invalid=9109, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:05:14,340 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2860 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:14,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 245 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2860 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:14,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 21:05:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 438. [2022-01-31 21:05:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 438 states, 433 states have (on average 1.2725173210161662) internal successors, (551), 433 states have internal predecessors, (551), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 555 transitions. [2022-01-31 21:05:14,501 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 555 transitions. Word has length 57 [2022-01-31 21:05:14,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:14,501 INFO L470 AbstractCegarLoop]: Abstraction has 438 states and 555 transitions. [2022-01-31 21:05:14,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 555 transitions. [2022-01-31 21:05:14,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 21:05:14,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:14,502 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:14,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 21:05:14,502 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:14,503 INFO L85 PathProgramCache]: Analyzing trace with hash 175334178, now seen corresponding path program 43 times [2022-01-31 21:05:14,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:14,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1977353584] [2022-01-31 21:05:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:14,634 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:14,705 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:14,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:14,825 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:14,825 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:14,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:14,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:14,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:17,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:17,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1977353584] [2022-01-31 21:05:17,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1977353584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:17,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:17,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 21:05:17,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887441503] [2022-01-31 21:05:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:17,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 21:05:17,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:17,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 21:05:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2655, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 21:05:17,051 INFO L87 Difference]: Start difference. First operand 438 states and 555 transitions. Second operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:19,422 INFO L93 Difference]: Finished difference Result 458 states and 576 transitions. [2022-01-31 21:05:19,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:05:19,422 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 21:05:19,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:19,423 INFO L225 Difference]: With dead ends: 458 [2022-01-31 21:05:19,423 INFO L226 Difference]: Without dead ends: 449 [2022-01-31 21:05:19,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1826 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=503, Invalid=9199, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 21:05:19,424 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:19,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 230 Invalid, 2801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:05:19,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2022-01-31 21:05:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 431. [2022-01-31 21:05:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 426 states have (on average 1.2535211267605635) internal successors, (534), 426 states have internal predecessors, (534), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 538 transitions. [2022-01-31 21:05:19,580 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 538 transitions. Word has length 57 [2022-01-31 21:05:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:19,581 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 538 transitions. [2022-01-31 21:05:19,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 538 transitions. [2022-01-31 21:05:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-31 21:05:19,581 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:19,581 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:19,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 21:05:19,582 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:19,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:19,582 INFO L85 PathProgramCache]: Analyzing trace with hash 103612270, now seen corresponding path program 44 times [2022-01-31 21:05:19,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:19,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118815161] [2022-01-31 21:05:19,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:19,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:19,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:19,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:19,761 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:19,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:19,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:21,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118815161] [2022-01-31 21:05:21,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [118815161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:21,091 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:21,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 21:05:21,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655667330] [2022-01-31 21:05:21,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:21,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 21:05:21,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:21,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 21:05:21,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2598, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 21:05:21,093 INFO L87 Difference]: Start difference. First operand 431 states and 538 transitions. Second operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:23,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:23,296 INFO L93 Difference]: Finished difference Result 451 states and 560 transitions. [2022-01-31 21:05:23,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 21:05:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-01-31 21:05:23,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:23,298 INFO L225 Difference]: With dead ends: 451 [2022-01-31 21:05:23,298 INFO L226 Difference]: Without dead ends: 442 [2022-01-31 21:05:23,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=397, Invalid=9109, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 21:05:23,299 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3299 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:23,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 250 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3299 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:05:23,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-01-31 21:05:23,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 434. [2022-01-31 21:05:23,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 429 states have (on average 1.2517482517482517) internal successors, (537), 429 states have internal predecessors, (537), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:23,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 541 transitions. [2022-01-31 21:05:23,460 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 541 transitions. Word has length 57 [2022-01-31 21:05:23,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:23,460 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 541 transitions. [2022-01-31 21:05:23,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.06) internal successors, (53), 49 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:23,461 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 541 transitions. [2022-01-31 21:05:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-01-31 21:05:23,461 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:23,461 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:23,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 21:05:23,461 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:23,462 INFO L85 PathProgramCache]: Analyzing trace with hash -877016337, now seen corresponding path program 45 times [2022-01-31 21:05:23,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:23,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808756074] [2022-01-31 21:05:23,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:23,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:23,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:23,577 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:05:23,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:23,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:23,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:25,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808756074] [2022-01-31 21:05:25,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1808756074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:25,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:25,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 21:05:25,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247777360] [2022-01-31 21:05:25,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:25,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 21:05:25,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:25,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 21:05:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2918, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:05:25,899 INFO L87 Difference]: Start difference. First operand 434 states and 541 transitions. Second operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:29,157 INFO L93 Difference]: Finished difference Result 520 states and 652 transitions. [2022-01-31 21:05:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 21:05:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-01-31 21:05:29,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:29,159 INFO L225 Difference]: With dead ends: 520 [2022-01-31 21:05:29,159 INFO L226 Difference]: Without dead ends: 515 [2022-01-31 21:05:29,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=441, Invalid=11115, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 21:05:29,160 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 5020 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 5065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:29,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 265 Invalid, 5065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5020 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:05:29,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-31 21:05:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 481. [2022-01-31 21:05:29,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 476 states have (on average 1.2752100840336134) internal successors, (607), 476 states have internal predecessors, (607), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 611 transitions. [2022-01-31 21:05:29,345 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 611 transitions. Word has length 58 [2022-01-31 21:05:29,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:29,345 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 611 transitions. [2022-01-31 21:05:29,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 611 transitions. [2022-01-31 21:05:29,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:05:29,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:29,346 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:29,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 21:05:29,346 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:29,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:29,346 INFO L85 PathProgramCache]: Analyzing trace with hash -95896900, now seen corresponding path program 46 times [2022-01-31 21:05:29,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:29,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [452743160] [2022-01-31 21:05:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:29,485 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:29,523 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:29,572 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:29,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:29,655 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:29,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:29,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:30,808 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:30,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [452743160] [2022-01-31 21:05:30,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [452743160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:30,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:30,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:05:30,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313090215] [2022-01-31 21:05:30,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:30,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:05:30,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:30,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:05:30,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=2777, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:05:30,809 INFO L87 Difference]: Start difference. First operand 481 states and 611 transitions. Second operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:32,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:32,243 INFO L93 Difference]: Finished difference Result 497 states and 629 transitions. [2022-01-31 21:05:32,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:05:32,244 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 21:05:32,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:32,260 INFO L225 Difference]: With dead ends: 497 [2022-01-31 21:05:32,260 INFO L226 Difference]: Without dead ends: 488 [2022-01-31 21:05:32,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=473, Invalid=9829, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:05:32,261 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:32,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 250 Invalid, 3049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3017 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 21:05:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-31 21:05:32,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 483. [2022-01-31 21:05:32,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 478 states have (on average 1.2740585774058577) internal successors, (609), 478 states have internal predecessors, (609), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:32,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 613 transitions. [2022-01-31 21:05:32,477 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 613 transitions. Word has length 59 [2022-01-31 21:05:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:32,477 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 613 transitions. [2022-01-31 21:05:32,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 613 transitions. [2022-01-31 21:05:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:05:32,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:32,478 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:32,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 21:05:32,478 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:32,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:32,478 INFO L85 PathProgramCache]: Analyzing trace with hash 911896524, now seen corresponding path program 47 times [2022-01-31 21:05:32,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:32,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145699623] [2022-01-31 21:05:32,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:32,569 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:32,641 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:32,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:32,790 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:32,791 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:32,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:32,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:32,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:33,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:33,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145699623] [2022-01-31 21:05:33,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [145699623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:33,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:33,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:05:33,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567806988] [2022-01-31 21:05:33,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:33,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:05:33,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:33,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:05:33,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2806, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:05:33,806 INFO L87 Difference]: Start difference. First operand 483 states and 613 transitions. Second operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:35,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:35,885 INFO L93 Difference]: Finished difference Result 502 states and 634 transitions. [2022-01-31 21:05:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:05:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 21:05:35,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:35,887 INFO L225 Difference]: With dead ends: 502 [2022-01-31 21:05:35,887 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 21:05:35,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1668 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=413, Invalid=9889, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:05:35,888 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3397 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:35,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 250 Invalid, 3433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3397 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:05:35,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 21:05:36,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 485. [2022-01-31 21:05:36,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 480 states have (on average 1.2729166666666667) internal successors, (611), 480 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 615 transitions. [2022-01-31 21:05:36,087 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 615 transitions. Word has length 59 [2022-01-31 21:05:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:36,087 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 615 transitions. [2022-01-31 21:05:36,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:36,088 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 615 transitions. [2022-01-31 21:05:36,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 21:05:36,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:36,088 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:36,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 21:05:36,089 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:36,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:36,089 INFO L85 PathProgramCache]: Analyzing trace with hash 380792720, now seen corresponding path program 48 times [2022-01-31 21:05:36,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:36,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751631497] [2022-01-31 21:05:36,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:36,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:36,203 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:36,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:36,271 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:36,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:36,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:36,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:36,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:36,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:37,367 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:37,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751631497] [2022-01-31 21:05:37,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [751631497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:37,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:37,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:05:37,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639669549] [2022-01-31 21:05:37,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:37,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:05:37,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:05:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=2806, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 21:05:37,372 INFO L87 Difference]: Start difference. First operand 485 states and 615 transitions. Second operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:38,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:38,973 INFO L93 Difference]: Finished difference Result 505 states and 637 transitions. [2022-01-31 21:05:38,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:05:38,973 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 21:05:38,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:38,975 INFO L225 Difference]: With dead ends: 505 [2022-01-31 21:05:38,975 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 21:05:38,975 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1666 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=413, Invalid=9889, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 21:05:38,976 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 3563 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 3600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:38,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 255 Invalid, 3600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3563 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 21:05:39,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 488. [2022-01-31 21:05:39,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 483 states have (on average 1.2712215320910973) internal successors, (614), 483 states have internal predecessors, (614), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 618 transitions. [2022-01-31 21:05:39,167 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 618 transitions. Word has length 59 [2022-01-31 21:05:39,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:39,167 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 618 transitions. [2022-01-31 21:05:39,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 51 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:39,168 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 618 transitions. [2022-01-31 21:05:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 21:05:39,178 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:39,178 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:39,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 21:05:39,178 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:39,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:39,178 INFO L85 PathProgramCache]: Analyzing trace with hash -874356979, now seen corresponding path program 49 times [2022-01-31 21:05:39,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:39,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332504441] [2022-01-31 21:05:39,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:39,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:39,266 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:39,266 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:05:39,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:39,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:39,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:41,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:41,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332504441] [2022-01-31 21:05:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1332504441] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:41,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:41,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 21:05:41,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576772902] [2022-01-31 21:05:41,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:41,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 21:05:41,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:41,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 21:05:41,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3138, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:05:41,716 INFO L87 Difference]: Start difference. First operand 488 states and 618 transitions. Second operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:46,096 INFO L93 Difference]: Finished difference Result 577 states and 733 transitions. [2022-01-31 21:05:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 21:05:46,097 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-01-31 21:05:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:46,099 INFO L225 Difference]: With dead ends: 577 [2022-01-31 21:05:46,099 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 21:05:46,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=457, Invalid=11975, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 21:05:46,100 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5429 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 5474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 5429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:46,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 275 Invalid, 5474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 5429 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:05:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 21:05:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 537. [2022-01-31 21:05:46,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 532 states have (on average 1.2913533834586466) internal successors, (687), 532 states have internal predecessors, (687), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 691 transitions. [2022-01-31 21:05:46,306 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 691 transitions. Word has length 60 [2022-01-31 21:05:46,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:46,306 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 691 transitions. [2022-01-31 21:05:46,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 54 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:46,306 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 691 transitions. [2022-01-31 21:05:46,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:05:46,324 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:46,324 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:46,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 21:05:46,324 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash 645363910, now seen corresponding path program 50 times [2022-01-31 21:05:46,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:46,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534461323] [2022-01-31 21:05:46,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:46,454 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:46,496 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:46,560 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:46,596 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:46,597 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:46,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:46,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:48,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:48,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534461323] [2022-01-31 21:05:48,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1534461323] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:48,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:48,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 21:05:48,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404278419] [2022-01-31 21:05:48,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:48,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 21:05:48,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 21:05:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2869, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 21:05:48,370 INFO L87 Difference]: Start difference. First operand 537 states and 691 transitions. Second operand has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:50,120 INFO L93 Difference]: Finished difference Result 547 states and 702 transitions. [2022-01-31 21:05:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 21:05:50,124 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:05:50,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:50,125 INFO L225 Difference]: With dead ends: 547 [2022-01-31 21:05:50,125 INFO L226 Difference]: Without dead ends: 514 [2022-01-31 21:05:50,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=529, Invalid=9977, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 21:05:50,126 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2299 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:50,126 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 225 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2299 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-01-31 21:05:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 514. [2022-01-31 21:05:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 509 states have (on average 1.300589390962672) internal successors, (662), 509 states have internal predecessors, (662), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 666 transitions. [2022-01-31 21:05:50,324 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 666 transitions. Word has length 61 [2022-01-31 21:05:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:50,324 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 666 transitions. [2022-01-31 21:05:50,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.0961538461538463) internal successors, (57), 51 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 666 transitions. [2022-01-31 21:05:50,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:05:50,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:50,325 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:50,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 21:05:50,325 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:50,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:50,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1995828874, now seen corresponding path program 51 times [2022-01-31 21:05:50,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:50,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2072411564] [2022-01-31 21:05:50,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:50,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:50,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:50,628 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:50,678 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:50,678 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:50,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:50,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:52,796 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2072411564] [2022-01-31 21:05:52,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2072411564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:52,796 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:52,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:05:52,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540259874] [2022-01-31 21:05:52,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:52,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:05:52,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:05:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=3135, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:05:52,798 INFO L87 Difference]: Start difference. First operand 514 states and 666 transitions. Second operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:55,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:55,555 INFO L93 Difference]: Finished difference Result 546 states and 700 transitions. [2022-01-31 21:05:55,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:05:55,555 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:05:55,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:55,557 INFO L225 Difference]: With dead ends: 546 [2022-01-31 21:05:55,557 INFO L226 Difference]: Without dead ends: 537 [2022-01-31 21:05:55,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=432, Invalid=10910, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:05:55,558 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 2828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:55,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 265 Invalid, 2828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:05:55,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-31 21:05:55,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 537. [2022-01-31 21:05:55,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 532 states have (on average 1.287593984962406) internal successors, (685), 532 states have internal predecessors, (685), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:55,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 689 transitions. [2022-01-31 21:05:55,762 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 689 transitions. Word has length 61 [2022-01-31 21:05:55,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:55,762 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 689 transitions. [2022-01-31 21:05:55,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:55,762 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 689 transitions. [2022-01-31 21:05:55,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:05:55,762 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:55,763 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:55,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 21:05:55,763 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:55,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:55,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1837854822, now seen corresponding path program 52 times [2022-01-31 21:05:55,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:55,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988258429] [2022-01-31 21:05:55,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:55,893 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:55,958 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:56,033 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:56,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:56,081 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:56,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:56,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:05:57,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:05:57,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988258429] [2022-01-31 21:05:57,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1988258429] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:05:57,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:05:57,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:05:57,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550856688] [2022-01-31 21:05:57,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:05:57,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:05:57,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:05:57,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:05:57,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3022, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:05:57,529 INFO L87 Difference]: Start difference. First operand 537 states and 689 transitions. Second operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:05:59,217 INFO L93 Difference]: Finished difference Result 551 states and 705 transitions. [2022-01-31 21:05:59,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:05:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:05:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:05:59,218 INFO L225 Difference]: With dead ends: 551 [2022-01-31 21:05:59,218 INFO L226 Difference]: Without dead ends: 542 [2022-01-31 21:05:59,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=429, Invalid=10701, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:05:59,219 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 3267 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:05:59,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 270 Invalid, 3300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3267 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:05:59,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-01-31 21:05:59,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 539. [2022-01-31 21:05:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 534 states have (on average 1.2865168539325842) internal successors, (687), 534 states have internal predecessors, (687), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:59,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 691 transitions. [2022-01-31 21:05:59,423 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 691 transitions. Word has length 61 [2022-01-31 21:05:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:05:59,423 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 691 transitions. [2022-01-31 21:05:59,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:05:59,423 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 691 transitions. [2022-01-31 21:05:59,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:05:59,423 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:05:59,423 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:05:59,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 21:05:59,423 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:05:59,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:05:59,424 INFO L85 PathProgramCache]: Analyzing trace with hash 283984042, now seen corresponding path program 53 times [2022-01-31 21:05:59,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:05:59,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221716512] [2022-01-31 21:05:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:05:59,533 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:59,588 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:59,647 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:59,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:05:59,722 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:05:59,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:05:59,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:59,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:05:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:05:59,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:00,694 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:00,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221716512] [2022-01-31 21:06:00,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [221716512] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:00,694 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:00,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:06:00,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156017780] [2022-01-31 21:06:00,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:00,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:06:00,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:00,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:06:00,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2985, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:06:00,695 INFO L87 Difference]: Start difference. First operand 539 states and 691 transitions. Second operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:02,372 INFO L93 Difference]: Finished difference Result 556 states and 710 transitions. [2022-01-31 21:06:02,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:06:02,372 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:06:02,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:02,375 INFO L225 Difference]: With dead ends: 556 [2022-01-31 21:06:02,375 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 21:06:02,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=505, Invalid=10625, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:06:02,376 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3539 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:02,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 260 Invalid, 3576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3539 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:06:02,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 21:06:02,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 541. [2022-01-31 21:06:02,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 536 states have (on average 1.2854477611940298) internal successors, (689), 536 states have internal predecessors, (689), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 693 transitions. [2022-01-31 21:06:02,599 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 693 transitions. Word has length 61 [2022-01-31 21:06:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:02,599 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 693 transitions. [2022-01-31 21:06:02,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 693 transitions. [2022-01-31 21:06:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:06:02,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:02,599 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:02,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 21:06:02,600 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:02,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash 994336622, now seen corresponding path program 54 times [2022-01-31 21:06:02,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:02,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558818999] [2022-01-31 21:06:02,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:02,657 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:02,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:02,775 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:02,808 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:02,808 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:02,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:02,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:02,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:03,836 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:03,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558818999] [2022-01-31 21:06:03,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558818999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:03,836 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:03,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:06:03,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302660897] [2022-01-31 21:06:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:03,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:06:03,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:06:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3022, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 21:06:03,838 INFO L87 Difference]: Start difference. First operand 541 states and 693 transitions. Second operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:05,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:05,523 INFO L93 Difference]: Finished difference Result 558 states and 712 transitions. [2022-01-31 21:06:05,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:06:05,524 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:06:05,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:05,525 INFO L225 Difference]: With dead ends: 558 [2022-01-31 21:06:05,525 INFO L226 Difference]: Without dead ends: 549 [2022-01-31 21:06:05,526 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1789 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=429, Invalid=10701, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 21:06:05,526 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 3748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:05,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 265 Invalid, 3748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 21:06:05,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-01-31 21:06:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 543. [2022-01-31 21:06:05,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.2843866171003717) internal successors, (691), 538 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:05,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 695 transitions. [2022-01-31 21:06:05,767 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 695 transitions. Word has length 61 [2022-01-31 21:06:05,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:05,767 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 695 transitions. [2022-01-31 21:06:05,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:05,767 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 695 transitions. [2022-01-31 21:06:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-01-31 21:06:05,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:05,768 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:05,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 21:06:05,768 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:05,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:05,768 INFO L85 PathProgramCache]: Analyzing trace with hash 463232818, now seen corresponding path program 55 times [2022-01-31 21:06:05,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765322929] [2022-01-31 21:06:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:05,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:05,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:05,902 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:05,903 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:05,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:05,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:08,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:08,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765322929] [2022-01-31 21:06:08,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765322929] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:08,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:08,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 21:06:08,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683533320] [2022-01-31 21:06:08,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:08,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 21:06:08,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:08,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 21:06:08,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3089, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 21:06:08,481 INFO L87 Difference]: Start difference. First operand 543 states and 695 transitions. Second operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:12,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:12,228 INFO L93 Difference]: Finished difference Result 569 states and 722 transitions. [2022-01-31 21:06:12,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 21:06:12,228 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-01-31 21:06:12,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:12,230 INFO L225 Difference]: With dead ends: 569 [2022-01-31 21:06:12,230 INFO L226 Difference]: Without dead ends: 560 [2022-01-31 21:06:12,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=525, Invalid=10817, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 21:06:12,231 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 3985 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 4034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:12,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 270 Invalid, 4034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3985 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:06:12,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-31 21:06:12,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 543. [2022-01-31 21:06:12,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.2657992565055762) internal successors, (681), 538 states have internal predecessors, (681), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:12,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 685 transitions. [2022-01-31 21:06:12,442 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 685 transitions. Word has length 61 [2022-01-31 21:06:12,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:12,442 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 685 transitions. [2022-01-31 21:06:12,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 53 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:12,442 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 685 transitions. [2022-01-31 21:06:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 21:06:12,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:12,443 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:12,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 21:06:12,443 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:12,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1681286059, now seen corresponding path program 56 times [2022-01-31 21:06:12,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:12,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152213666] [2022-01-31 21:06:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:12,482 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:12,531 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:12,531 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:06:12,531 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:12,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:12,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:15,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:15,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152213666] [2022-01-31 21:06:15,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [152213666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:15,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:15,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 21:06:15,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616779422] [2022-01-31 21:06:15,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:15,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 21:06:15,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:15,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 21:06:15,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=3366, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:06:15,061 INFO L87 Difference]: Start difference. First operand 543 states and 685 transitions. Second operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:19,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:19,213 INFO L93 Difference]: Finished difference Result 634 states and 803 transitions. [2022-01-31 21:06:19,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 21:06:19,214 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-01-31 21:06:19,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:19,215 INFO L225 Difference]: With dead ends: 634 [2022-01-31 21:06:19,215 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 21:06:19,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=473, Invalid=12867, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 21:06:19,216 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 5955 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 6001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:19,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 290 Invalid, 6001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5955 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:06:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 21:06:19,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 594. [2022-01-31 21:06:19,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 589 states have (on average 1.2852292020373515) internal successors, (757), 589 states have internal predecessors, (757), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:19,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 761 transitions. [2022-01-31 21:06:19,448 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 761 transitions. Word has length 62 [2022-01-31 21:06:19,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:19,448 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 761 transitions. [2022-01-31 21:06:19,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 56 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:19,448 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 761 transitions. [2022-01-31 21:06:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:06:19,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:19,449 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:19,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 21:06:19,449 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash -383615572, now seen corresponding path program 57 times [2022-01-31 21:06:19,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:19,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738801704] [2022-01-31 21:06:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:19,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:19,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:19,637 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:19,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:19,690 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:19,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:19,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:19,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:19,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:22,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:22,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738801704] [2022-01-31 21:06:22,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [738801704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:22,296 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:22,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:06:22,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803123875] [2022-01-31 21:06:22,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:22,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:06:22,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:22,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:06:22,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:06:22,297 INFO L87 Difference]: Start difference. First operand 594 states and 761 transitions. Second operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:24,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:24,886 INFO L93 Difference]: Finished difference Result 604 states and 772 transitions. [2022-01-31 21:06:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:06:24,886 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 21:06:24,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:24,888 INFO L225 Difference]: With dead ends: 604 [2022-01-31 21:06:24,888 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 21:06:24,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3216 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=561, Invalid=11649, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:06:24,888 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 2550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:24,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 225 Invalid, 2550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:06:24,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 21:06:25,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 594. [2022-01-31 21:06:25,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 589 states have (on average 1.2835314091680814) internal successors, (756), 589 states have internal predecessors, (756), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:25,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 760 transitions. [2022-01-31 21:06:25,126 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 760 transitions. Word has length 63 [2022-01-31 21:06:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:25,126 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 760 transitions. [2022-01-31 21:06:25,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 760 transitions. [2022-01-31 21:06:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:06:25,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:25,127 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:25,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 21:06:25,127 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:25,127 INFO L85 PathProgramCache]: Analyzing trace with hash -822172424, now seen corresponding path program 58 times [2022-01-31 21:06:25,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:25,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216851712] [2022-01-31 21:06:25,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:25,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:25,265 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:25,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:25,363 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:25,363 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:25,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:25,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:25,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:27,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216851712] [2022-01-31 21:06:27,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216851712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:27,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:27,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:06:27,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563245301] [2022-01-31 21:06:27,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:27,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:06:27,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:06:27,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3300, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:06:27,580 INFO L87 Difference]: Start difference. First operand 594 states and 760 transitions. Second operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:30,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:30,697 INFO L93 Difference]: Finished difference Result 611 states and 778 transitions. [2022-01-31 21:06:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:06:30,698 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 21:06:30,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:30,699 INFO L225 Difference]: With dead ends: 611 [2022-01-31 21:06:30,699 INFO L226 Difference]: Without dead ends: 602 [2022-01-31 21:06:30,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=588, Invalid=11622, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:06:30,700 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2932 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:30,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 230 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2932 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:06:30,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-01-31 21:06:30,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 579. [2022-01-31 21:06:30,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 579 states, 574 states have (on average 1.2735191637630663) internal successors, (731), 574 states have internal predecessors, (731), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:30,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 735 transitions. [2022-01-31 21:06:30,929 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 735 transitions. Word has length 63 [2022-01-31 21:06:30,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:30,929 INFO L470 AbstractCegarLoop]: Abstraction has 579 states and 735 transitions. [2022-01-31 21:06:30,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:30,929 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 735 transitions. [2022-01-31 21:06:30,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:06:30,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:30,930 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:30,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 21:06:30,930 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:30,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:30,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1844489720, now seen corresponding path program 59 times [2022-01-31 21:06:30,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:30,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835716848] [2022-01-31 21:06:30,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:31,079 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:31,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:31,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:31,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:31,290 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:31,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:31,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:33,944 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:33,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835716848] [2022-01-31 21:06:33,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [835716848] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:33,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:33,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:06:33,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031859580] [2022-01-31 21:06:33,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:33,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:06:33,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:33,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:06:33,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=3308, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:06:33,945 INFO L87 Difference]: Start difference. First operand 579 states and 735 transitions. Second operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:37,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:37,242 INFO L93 Difference]: Finished difference Result 604 states and 761 transitions. [2022-01-31 21:06:37,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:06:37,243 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 21:06:37,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:37,244 INFO L225 Difference]: With dead ends: 604 [2022-01-31 21:06:37,244 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 21:06:37,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2230 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=564, Invalid=11646, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:06:37,245 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3806 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 3853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 3806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:37,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 265 Invalid, 3853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 3806 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:06:37,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 21:06:37,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 572. [2022-01-31 21:06:37,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 567 states have (on average 1.2592592592592593) internal successors, (714), 567 states have internal predecessors, (714), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 718 transitions. [2022-01-31 21:06:37,474 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 718 transitions. Word has length 63 [2022-01-31 21:06:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:37,474 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 718 transitions. [2022-01-31 21:06:37,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 718 transitions. [2022-01-31 21:06:37,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:06:37,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:37,475 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:37,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 21:06:37,475 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:37,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:37,475 INFO L85 PathProgramCache]: Analyzing trace with hash -2095460404, now seen corresponding path program 60 times [2022-01-31 21:06:37,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:37,475 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806669525] [2022-01-31 21:06:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:37,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:37,722 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:37,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:37,876 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:37,876 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:37,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:37,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:37,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:39,708 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:39,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806669525] [2022-01-31 21:06:39,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806669525] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:39,708 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:39,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:06:39,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248964577] [2022-01-31 21:06:39,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:39,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:06:39,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:39,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:06:39,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3246, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 21:06:39,709 INFO L87 Difference]: Start difference. First operand 572 states and 718 transitions. Second operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:41,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:41,910 INFO L93 Difference]: Finished difference Result 591 states and 739 transitions. [2022-01-31 21:06:41,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:06:41,910 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 21:06:41,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:41,912 INFO L225 Difference]: With dead ends: 591 [2022-01-31 21:06:41,912 INFO L226 Difference]: Without dead ends: 582 [2022-01-31 21:06:41,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1916 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=445, Invalid=11545, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 21:06:41,912 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 3890 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 3928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:41,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 270 Invalid, 3928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3890 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:06:41,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-01-31 21:06:42,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 574. [2022-01-31 21:06:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 569 states have (on average 1.258347978910369) internal successors, (716), 569 states have internal predecessors, (716), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 720 transitions. [2022-01-31 21:06:42,141 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 720 transitions. Word has length 63 [2022-01-31 21:06:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:42,142 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 720 transitions. [2022-01-31 21:06:42,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 720 transitions. [2022-01-31 21:06:42,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 21:06:42,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:42,142 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:42,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 21:06:42,142 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:42,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:42,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1916211628, now seen corresponding path program 61 times [2022-01-31 21:06:42,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:42,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012810920] [2022-01-31 21:06:42,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:42,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:42,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:42,348 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:42,348 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:42,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:42,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:42,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:42,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:44,900 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:44,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012810920] [2022-01-31 21:06:44,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012810920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:44,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:44,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:06:44,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070178455] [2022-01-31 21:06:44,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:44,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:06:44,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:44,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:06:44,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3314, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:06:44,902 INFO L87 Difference]: Start difference. First operand 574 states and 720 transitions. Second operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:48,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:48,003 INFO L93 Difference]: Finished difference Result 604 states and 751 transitions. [2022-01-31 21:06:48,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:06:48,003 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 21:06:48,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:48,005 INFO L225 Difference]: With dead ends: 604 [2022-01-31 21:06:48,005 INFO L226 Difference]: Without dead ends: 595 [2022-01-31 21:06:48,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=546, Invalid=11664, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:06:48,006 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 4195 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 4245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:48,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 270 Invalid, 4245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4195 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:06:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-01-31 21:06:48,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 574. [2022-01-31 21:06:48,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 569 states have (on average 1.2407732864674867) internal successors, (706), 569 states have internal predecessors, (706), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:48,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 710 transitions. [2022-01-31 21:06:48,231 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 710 transitions. Word has length 63 [2022-01-31 21:06:48,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:48,231 INFO L470 AbstractCegarLoop]: Abstraction has 574 states and 710 transitions. [2022-01-31 21:06:48,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 55 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 710 transitions. [2022-01-31 21:06:48,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 21:06:48,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:48,232 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:48,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 21:06:48,232 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash 932952265, now seen corresponding path program 62 times [2022-01-31 21:06:48,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:48,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473335901] [2022-01-31 21:06:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:48,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:48,322 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:48,322 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:06:48,323 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:48,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:48,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:50,385 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:50,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473335901] [2022-01-31 21:06:50,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473335901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:50,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:50,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 21:06:50,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457514536] [2022-01-31 21:06:50,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:50,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 21:06:50,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:50,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 21:06:50,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3602, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:06:50,389 INFO L87 Difference]: Start difference. First operand 574 states and 710 transitions. Second operand has 60 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:54,831 INFO L93 Difference]: Finished difference Result 671 states and 835 transitions. [2022-01-31 21:06:54,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 21:06:54,832 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-01-31 21:06:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:54,834 INFO L225 Difference]: With dead ends: 671 [2022-01-31 21:06:54,834 INFO L226 Difference]: Without dead ends: 666 [2022-01-31 21:06:54,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=489, Invalid=13791, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 21:06:54,840 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 70 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 6187 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 6235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:54,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 290 Invalid, 6235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6187 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:06:54,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-31 21:06:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 627. [2022-01-31 21:06:55,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 622 states have (on average 1.2620578778135048) internal successors, (785), 622 states have internal predecessors, (785), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 789 transitions. [2022-01-31 21:06:55,121 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 789 transitions. Word has length 64 [2022-01-31 21:06:55,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:55,121 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 789 transitions. [2022-01-31 21:06:55,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:55,121 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 789 transitions. [2022-01-31 21:06:55,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:06:55,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:55,122 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:55,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 21:06:55,122 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:55,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:55,122 INFO L85 PathProgramCache]: Analyzing trace with hash 120668614, now seen corresponding path program 63 times [2022-01-31 21:06:55,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:55,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291796359] [2022-01-31 21:06:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:55,264 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:55,356 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:55,428 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:55,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:55,481 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:55,481 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:55,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:55,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:55,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:06:57,162 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:06:57,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291796359] [2022-01-31 21:06:57,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1291796359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:06:57,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:06:57,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 21:06:57,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987449367] [2022-01-31 21:06:57,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:06:57,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 21:06:57,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:06:57,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 21:06:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3319, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 21:06:57,164 INFO L87 Difference]: Start difference. First operand 627 states and 789 transitions. Second operand has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:59,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:06:59,408 INFO L93 Difference]: Finished difference Result 639 states and 803 transitions. [2022-01-31 21:06:59,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 21:06:59,408 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:06:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:06:59,409 INFO L225 Difference]: With dead ends: 639 [2022-01-31 21:06:59,410 INFO L226 Difference]: Without dead ends: 630 [2022-01-31 21:06:59,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=537, Invalid=11673, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 21:06:59,411 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 3069 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 3096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:06:59,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 275 Invalid, 3096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3069 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:06:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-01-31 21:06:59,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 629. [2022-01-31 21:06:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 624 states have (on average 1.2612179487179487) internal successors, (787), 624 states have internal predecessors, (787), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 791 transitions. [2022-01-31 21:06:59,667 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 791 transitions. Word has length 65 [2022-01-31 21:06:59,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:06:59,667 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 791 transitions. [2022-01-31 21:06:59,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 55 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:06:59,667 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 791 transitions. [2022-01-31 21:06:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:06:59,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:06:59,668 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:06:59,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 21:06:59,668 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:06:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:06:59,668 INFO L85 PathProgramCache]: Analyzing trace with hash 837375626, now seen corresponding path program 64 times [2022-01-31 21:06:59,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:06:59,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902221523] [2022-01-31 21:06:59,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:06:59,761 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:59,807 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:59,854 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:59,899 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:06:59,900 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:06:59,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:06:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:59,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:06:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:06:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:01,829 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:01,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902221523] [2022-01-31 21:07:01,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [902221523] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:01,829 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:01,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:07:01,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744112436] [2022-01-31 21:07:01,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:01,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:07:01,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:01,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:07:01,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=3527, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:07:01,832 INFO L87 Difference]: Start difference. First operand 629 states and 791 transitions. Second operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:04,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:04,007 INFO L93 Difference]: Finished difference Result 638 states and 801 transitions. [2022-01-31 21:07:04,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:07:04,007 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:07:04,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:04,009 INFO L225 Difference]: With dead ends: 638 [2022-01-31 21:07:04,009 INFO L226 Difference]: Without dead ends: 629 [2022-01-31 21:07:04,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3398 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=631, Invalid=12479, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:07:04,011 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:04,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 235 Invalid, 2757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:07:04,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-01-31 21:07:04,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 629. [2022-01-31 21:07:04,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 624 states have (on average 1.2596153846153846) internal successors, (786), 624 states have internal predecessors, (786), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 790 transitions. [2022-01-31 21:07:04,321 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 790 transitions. Word has length 65 [2022-01-31 21:07:04,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:04,321 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 790 transitions. [2022-01-31 21:07:04,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:04,321 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 790 transitions. [2022-01-31 21:07:04,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:07:04,322 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:04,322 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:04,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 21:07:04,322 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:04,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:04,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2107126706, now seen corresponding path program 65 times [2022-01-31 21:07:04,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:04,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2075716093] [2022-01-31 21:07:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:04,468 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:04,541 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:04,615 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:04,667 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:04,668 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:04,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:04,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:06,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:06,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2075716093] [2022-01-31 21:07:06,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2075716093] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:06,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:06,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:07:06,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202205906] [2022-01-31 21:07:06,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:06,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:07:06,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:06,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:07:06,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=3551, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 21:07:06,366 INFO L87 Difference]: Start difference. First operand 629 states and 790 transitions. Second operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:08,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:08,775 INFO L93 Difference]: Finished difference Result 662 states and 825 transitions. [2022-01-31 21:07:08,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:07:08,775 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:07:08,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:08,777 INFO L225 Difference]: With dead ends: 662 [2022-01-31 21:07:08,777 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 21:07:08,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1967 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=561, Invalid=12549, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 21:07:08,778 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 3583 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:08,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 295 Invalid, 3614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:07:08,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 21:07:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 652. [2022-01-31 21:07:09,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 647 states have (on average 1.250386398763524) internal successors, (809), 647 states have internal predecessors, (809), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 813 transitions. [2022-01-31 21:07:09,061 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 813 transitions. Word has length 65 [2022-01-31 21:07:09,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:09,062 INFO L470 AbstractCegarLoop]: Abstraction has 652 states and 813 transitions. [2022-01-31 21:07:09,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:09,062 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 813 transitions. [2022-01-31 21:07:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:07:09,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:09,062 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:09,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 21:07:09,062 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash 726966442, now seen corresponding path program 66 times [2022-01-31 21:07:09,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:09,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550893062] [2022-01-31 21:07:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:09,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:09,185 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:09,233 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:09,279 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:09,279 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:09,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:09,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:10,352 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550893062] [2022-01-31 21:07:10,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550893062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:10,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:10,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:07:10,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918074391] [2022-01-31 21:07:10,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:10,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:07:10,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:10,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:07:10,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=3439, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:07:10,354 INFO L87 Difference]: Start difference. First operand 652 states and 813 transitions. Second operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:12,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:12,275 INFO L93 Difference]: Finished difference Result 670 states and 833 transitions. [2022-01-31 21:07:12,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:07:12,276 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:07:12,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:12,278 INFO L225 Difference]: With dead ends: 670 [2022-01-31 21:07:12,278 INFO L226 Difference]: Without dead ends: 661 [2022-01-31 21:07:12,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2626 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=541, Invalid=12341, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 21:07:12,280 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 4072 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 4110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:12,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 275 Invalid, 4110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4072 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 21:07:12,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 661 states. [2022-01-31 21:07:12,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 661 to 654. [2022-01-31 21:07:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 654 states, 649 states have (on average 1.2496147919876734) internal successors, (811), 649 states have internal predecessors, (811), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:12,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 815 transitions. [2022-01-31 21:07:12,575 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 815 transitions. Word has length 65 [2022-01-31 21:07:12,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:12,575 INFO L470 AbstractCegarLoop]: Abstraction has 654 states and 815 transitions. [2022-01-31 21:07:12,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:12,575 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 815 transitions. [2022-01-31 21:07:12,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-01-31 21:07:12,575 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:12,575 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:12,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 21:07:12,576 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:12,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:12,576 INFO L85 PathProgramCache]: Analyzing trace with hash 655244534, now seen corresponding path program 67 times [2022-01-31 21:07:12,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:12,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108663325] [2022-01-31 21:07:12,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:12,617 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:12,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:12,692 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:12,692 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:12,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:12,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:12,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:13,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:13,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108663325] [2022-01-31 21:07:13,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108663325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:13,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:13,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 21:07:13,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380446928] [2022-01-31 21:07:13,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:13,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 21:07:13,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:13,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 21:07:13,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3478, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 21:07:13,857 INFO L87 Difference]: Start difference. First operand 654 states and 815 transitions. Second operand has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:15,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:15,869 INFO L93 Difference]: Finished difference Result 675 states and 838 transitions. [2022-01-31 21:07:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 21:07:15,869 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-01-31 21:07:15,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:15,871 INFO L225 Difference]: With dead ends: 675 [2022-01-31 21:07:15,871 INFO L226 Difference]: Without dead ends: 666 [2022-01-31 21:07:15,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=461, Invalid=12421, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 21:07:15,872 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 4549 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 4590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:15,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 285 Invalid, 4590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:07:15,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-01-31 21:07:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 657. [2022-01-31 21:07:16,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 652 states have (on average 1.2484662576687116) internal successors, (814), 652 states have internal predecessors, (814), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 818 transitions. [2022-01-31 21:07:16,141 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 818 transitions. Word has length 65 [2022-01-31 21:07:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:16,141 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 818 transitions. [2022-01-31 21:07:16,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 57 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 818 transitions. [2022-01-31 21:07:16,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 21:07:16,142 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:16,142 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:16,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 21:07:16,142 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:16,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:16,142 INFO L85 PathProgramCache]: Analyzing trace with hash -956285337, now seen corresponding path program 68 times [2022-01-31 21:07:16,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:16,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968951396] [2022-01-31 21:07:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:16,181 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:16,243 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:16,243 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:07:16,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:16,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:16,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:19,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:19,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968951396] [2022-01-31 21:07:19,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968951396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:19,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:19,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 21:07:19,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925897264] [2022-01-31 21:07:19,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:19,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 21:07:19,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:19,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 21:07:19,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3846, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:07:19,251 INFO L87 Difference]: Start difference. First operand 657 states and 818 transitions. Second operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:24,544 INFO L93 Difference]: Finished difference Result 756 states and 946 transitions. [2022-01-31 21:07:24,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 21:07:24,545 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-01-31 21:07:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:24,547 INFO L225 Difference]: With dead ends: 756 [2022-01-31 21:07:24,547 INFO L226 Difference]: Without dead ends: 751 [2022-01-31 21:07:24,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2425 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=505, Invalid=14747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 21:07:24,548 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 6635 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 6681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:24,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 300 Invalid, 6681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6635 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 21:07:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2022-01-31 21:07:24,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 712. [2022-01-31 21:07:24,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 707 states have (on average 1.2673267326732673) internal successors, (896), 707 states have internal predecessors, (896), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 900 transitions. [2022-01-31 21:07:24,845 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 900 transitions. Word has length 66 [2022-01-31 21:07:24,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:24,845 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 900 transitions. [2022-01-31 21:07:24,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 60 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:24,845 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 900 transitions. [2022-01-31 21:07:24,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:07:24,845 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:24,845 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:24,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 21:07:24,846 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:24,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:24,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1894415188, now seen corresponding path program 69 times [2022-01-31 21:07:24,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:24,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305469942] [2022-01-31 21:07:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:24,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:25,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:25,108 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:25,142 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:25,142 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:25,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:25,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:27,168 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:27,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305469942] [2022-01-31 21:07:27,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [305469942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:27,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:27,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:07:27,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709965340] [2022-01-31 21:07:27,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:27,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:07:27,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:27,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:07:27,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=3769, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:07:27,170 INFO L87 Difference]: Start difference. First operand 712 states and 900 transitions. Second operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:29,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:29,766 INFO L93 Difference]: Finished difference Result 723 states and 912 transitions. [2022-01-31 21:07:29,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:07:29,767 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:07:29,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:29,768 INFO L225 Difference]: With dead ends: 723 [2022-01-31 21:07:29,768 INFO L226 Difference]: Without dead ends: 714 [2022-01-31 21:07:29,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3575 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=651, Invalid=13391, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 21:07:29,769 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 2908 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:29,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 235 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2908 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:07:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-31 21:07:30,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 689. [2022-01-31 21:07:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 684 states have (on average 1.273391812865497) internal successors, (871), 684 states have internal predecessors, (871), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:30,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 875 transitions. [2022-01-31 21:07:30,069 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 875 transitions. Word has length 67 [2022-01-31 21:07:30,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:30,069 INFO L470 AbstractCegarLoop]: Abstraction has 689 states and 875 transitions. [2022-01-31 21:07:30,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:30,069 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 875 transitions. [2022-01-31 21:07:30,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:07:30,070 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:30,070 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:30,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 21:07:30,070 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:30,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:30,070 INFO L85 PathProgramCache]: Analyzing trace with hash -543950224, now seen corresponding path program 70 times [2022-01-31 21:07:30,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:30,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308302979] [2022-01-31 21:07:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:30,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:30,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:30,365 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:30,414 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:30,414 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:30,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:30,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:30,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:32,518 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308302979] [2022-01-31 21:07:32,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1308302979] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:32,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:32,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:07:32,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937395666] [2022-01-31 21:07:32,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:32,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:07:32,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:07:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=3815, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:07:32,519 INFO L87 Difference]: Start difference. First operand 689 states and 875 transitions. Second operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:35,606 INFO L93 Difference]: Finished difference Result 723 states and 911 transitions. [2022-01-31 21:07:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:07:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:07:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:35,608 INFO L225 Difference]: With dead ends: 723 [2022-01-31 21:07:35,608 INFO L226 Difference]: Without dead ends: 714 [2022-01-31 21:07:35,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=537, Invalid=13505, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 21:07:35,609 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 3813 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 3845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:35,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 295 Invalid, 3845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3813 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:07:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-31 21:07:35,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 712. [2022-01-31 21:07:35,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 707 states have (on average 1.2644978783592644) internal successors, (894), 707 states have internal predecessors, (894), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 898 transitions. [2022-01-31 21:07:35,914 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 898 transitions. Word has length 67 [2022-01-31 21:07:35,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:35,914 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 898 transitions. [2022-01-31 21:07:35,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:35,914 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 898 transitions. [2022-01-31 21:07:35,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:07:35,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:35,915 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:35,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 21:07:35,915 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:35,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:35,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1340165624, now seen corresponding path program 71 times [2022-01-31 21:07:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:35,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101618405] [2022-01-31 21:07:35,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:36,010 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:36,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:36,179 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:36,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:36,256 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:36,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:36,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:36,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:36,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:37,441 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:37,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101618405] [2022-01-31 21:07:37,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1101618405] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:37,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:37,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:07:37,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101077919] [2022-01-31 21:07:37,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:37,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:07:37,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:37,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:07:37,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3718, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:07:37,443 INFO L87 Difference]: Start difference. First operand 712 states and 898 transitions. Second operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:39,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:39,562 INFO L93 Difference]: Finished difference Result 730 states and 918 transitions. [2022-01-31 21:07:39,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:07:39,562 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:07:39,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:39,564 INFO L225 Difference]: With dead ends: 730 [2022-01-31 21:07:39,564 INFO L226 Difference]: Without dead ends: 721 [2022-01-31 21:07:39,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2182 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=477, Invalid=13329, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 21:07:39,569 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4490 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:39,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 295 Invalid, 4528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4490 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 21:07:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-31 21:07:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 714. [2022-01-31 21:07:39,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 709 states have (on average 1.2637517630465445) internal successors, (896), 709 states have internal predecessors, (896), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 900 transitions. [2022-01-31 21:07:39,862 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 900 transitions. Word has length 67 [2022-01-31 21:07:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:39,862 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 900 transitions. [2022-01-31 21:07:39,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 900 transitions. [2022-01-31 21:07:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:07:39,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:39,863 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:39,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 21:07:39,863 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:39,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:39,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1545442476, now seen corresponding path program 72 times [2022-01-31 21:07:39,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:39,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53289012] [2022-01-31 21:07:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:39,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:39,971 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:40,034 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:40,069 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:40,069 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:40,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:40,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:40,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:41,356 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:41,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53289012] [2022-01-31 21:07:41,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [53289012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:41,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:41,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:07:41,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966393609] [2022-01-31 21:07:41,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:41,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:07:41,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:41,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:07:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3718, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:07:41,358 INFO L87 Difference]: Start difference. First operand 714 states and 900 transitions. Second operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:43,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:43,888 INFO L93 Difference]: Finished difference Result 734 states and 922 transitions. [2022-01-31 21:07:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:07:43,889 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:07:43,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:43,891 INFO L225 Difference]: With dead ends: 734 [2022-01-31 21:07:43,891 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 21:07:43,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2176 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=477, Invalid=13329, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 21:07:43,892 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 4662 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 4703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:43,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 285 Invalid, 4703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4662 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:07:43,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 21:07:44,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 716. [2022-01-31 21:07:44,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 711 states have (on average 1.2630098452883263) internal successors, (898), 711 states have internal predecessors, (898), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:44,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 902 transitions. [2022-01-31 21:07:44,241 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 902 transitions. Word has length 67 [2022-01-31 21:07:44,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:44,241 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 902 transitions. [2022-01-31 21:07:44,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:44,241 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 902 transitions. [2022-01-31 21:07:44,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 21:07:44,242 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:44,242 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:44,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 21:07:44,242 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:44,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -2076546280, now seen corresponding path program 73 times [2022-01-31 21:07:44,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:44,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78435073] [2022-01-31 21:07:44,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:44,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:44,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:44,393 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:44,394 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:44,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:44,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:44,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:44,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:44,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:45,639 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:45,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78435073] [2022-01-31 21:07:45,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [78435073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:45,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:45,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:07:45,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781315825] [2022-01-31 21:07:45,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:45,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:07:45,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:07:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3718, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 21:07:45,641 INFO L87 Difference]: Start difference. First operand 716 states and 902 transitions. Second operand has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:48,027 INFO L93 Difference]: Finished difference Result 737 states and 925 transitions. [2022-01-31 21:07:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:07:48,027 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 21:07:48,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:48,032 INFO L225 Difference]: With dead ends: 737 [2022-01-31 21:07:48,032 INFO L226 Difference]: Without dead ends: 728 [2022-01-31 21:07:48,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2174 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=477, Invalid=13329, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 21:07:48,033 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 5028 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 5028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:48,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 300 Invalid, 5069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 5028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:07:48,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-01-31 21:07:48,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 719. [2022-01-31 21:07:48,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 719 states, 714 states have (on average 1.2619047619047619) internal successors, (901), 714 states have internal predecessors, (901), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:48,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 719 states to 719 states and 905 transitions. [2022-01-31 21:07:48,351 INFO L78 Accepts]: Start accepts. Automaton has 719 states and 905 transitions. Word has length 67 [2022-01-31 21:07:48,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:48,351 INFO L470 AbstractCegarLoop]: Abstraction has 719 states and 905 transitions. [2022-01-31 21:07:48,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.05) internal successors, (63), 59 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:48,351 INFO L276 IsEmpty]: Start isEmpty. Operand 719 states and 905 transitions. [2022-01-31 21:07:48,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-01-31 21:07:48,352 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:48,352 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:48,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 21:07:48,352 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:48,352 INFO L85 PathProgramCache]: Analyzing trace with hash 257545349, now seen corresponding path program 74 times [2022-01-31 21:07:48,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:48,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690214994] [2022-01-31 21:07:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:48,419 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:48,508 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:48,508 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:07:48,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:48,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:48,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:48,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:51,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:51,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690214994] [2022-01-31 21:07:51,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [690214994] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:51,021 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:51,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 21:07:51,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699508215] [2022-01-31 21:07:51,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:51,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 21:07:51,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 21:07:51,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:07:51,022 INFO L87 Difference]: Start difference. First operand 719 states and 905 transitions. Second operand has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:07:55,853 INFO L93 Difference]: Finished difference Result 821 states and 1037 transitions. [2022-01-31 21:07:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 21:07:55,853 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-01-31 21:07:55,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:07:55,858 INFO L225 Difference]: With dead ends: 821 [2022-01-31 21:07:55,859 INFO L226 Difference]: Without dead ends: 816 [2022-01-31 21:07:55,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2570 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=521, Invalid=15735, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 21:07:55,860 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 6991 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 7039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:07:55,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 305 Invalid, 7039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6991 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:07:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-31 21:07:56,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 776. [2022-01-31 21:07:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 771 states have (on average 1.278858625162127) internal successors, (986), 771 states have internal predecessors, (986), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:56,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 990 transitions. [2022-01-31 21:07:56,211 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 990 transitions. Word has length 68 [2022-01-31 21:07:56,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:07:56,212 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 990 transitions. [2022-01-31 21:07:56,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 62 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:07:56,212 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 990 transitions. [2022-01-31 21:07:56,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:07:56,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:07:56,212 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:07:56,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 21:07:56,212 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:07:56,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:07:56,213 INFO L85 PathProgramCache]: Analyzing trace with hash -902780474, now seen corresponding path program 75 times [2022-01-31 21:07:56,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:07:56,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094346318] [2022-01-31 21:07:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:07:56,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:56,421 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:56,493 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:56,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:07:56,563 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:07:56,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:07:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:56,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:07:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:07:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:07:59,301 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:07:59,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094346318] [2022-01-31 21:07:59,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094346318] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:07:59,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:07:59,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 21:07:59,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547200470] [2022-01-31 21:07:59,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:07:59,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 21:07:59,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:07:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 21:07:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=3790, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 21:07:59,303 INFO L87 Difference]: Start difference. First operand 776 states and 990 transitions. Second operand has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:02,069 INFO L93 Difference]: Finished difference Result 786 states and 1001 transitions. [2022-01-31 21:08:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 21:08:02,069 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:02,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:02,074 INFO L225 Difference]: With dead ends: 786 [2022-01-31 21:08:02,074 INFO L226 Difference]: Without dead ends: 749 [2022-01-31 21:08:02,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3819 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=612, Invalid=13430, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 21:08:02,075 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 3046 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 3077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 3046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:02,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 250 Invalid, 3077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 3046 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:08:02,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-01-31 21:08:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 749. [2022-01-31 21:08:02,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 744 states have (on average 1.2862903225806452) internal successors, (957), 744 states have internal predecessors, (957), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:02,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 961 transitions. [2022-01-31 21:08:02,418 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 961 transitions. Word has length 69 [2022-01-31 21:08:02,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:02,419 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 961 transitions. [2022-01-31 21:08:02,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 59 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:02,419 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 961 transitions. [2022-01-31 21:08:02,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:08:02,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:02,419 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:02,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 21:08:02,419 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:02,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:02,420 INFO L85 PathProgramCache]: Analyzing trace with hash 657890698, now seen corresponding path program 76 times [2022-01-31 21:08:02,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:02,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028028248] [2022-01-31 21:08:02,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:02,528 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:02,577 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:02,644 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:02,682 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:02,683 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:02,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:02,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:02,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:04,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:04,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028028248] [2022-01-31 21:08:04,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2028028248] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:04,656 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:04,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:08:04,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684571134] [2022-01-31 21:08:04,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:04,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:08:04,656 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:04,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:08:04,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4096, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:08:04,657 INFO L87 Difference]: Start difference. First operand 749 states and 961 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:07,601 INFO L93 Difference]: Finished difference Result 785 states and 999 transitions. [2022-01-31 21:08:07,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:07,601 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:07,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:07,602 INFO L225 Difference]: With dead ends: 785 [2022-01-31 21:08:07,603 INFO L226 Difference]: Without dead ends: 776 [2022-01-31 21:08:07,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=495, Invalid=14511, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:08:07,615 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 3958 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 3988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:07,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 315 Invalid, 3988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3958 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:08:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-31 21:08:07,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-01-31 21:08:07,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 771 states have (on average 1.2762645914396886) internal successors, (984), 771 states have internal predecessors, (984), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:07,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 988 transitions. [2022-01-31 21:08:07,978 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 988 transitions. Word has length 69 [2022-01-31 21:08:07,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:07,979 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 988 transitions. [2022-01-31 21:08:07,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:07,979 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 988 transitions. [2022-01-31 21:08:07,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:08:07,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:07,983 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:07,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 21:08:07,983 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:07,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:07,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1374597710, now seen corresponding path program 77 times [2022-01-31 21:08:07,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:07,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592040813] [2022-01-31 21:08:07,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:08,067 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:08,111 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:08,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:08,222 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:08,223 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:08,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:08,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:10,527 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:10,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592040813] [2022-01-31 21:08:10,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [592040813] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:10,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:10,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:08:10,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808199134] [2022-01-31 21:08:10,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:10,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:08:10,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:10,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:08:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4044, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:08:10,529 INFO L87 Difference]: Start difference. First operand 776 states and 988 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:13,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:13,363 INFO L93 Difference]: Finished difference Result 787 states and 1000 transitions. [2022-01-31 21:08:13,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:13,363 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:13,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:13,364 INFO L225 Difference]: With dead ends: 787 [2022-01-31 21:08:13,364 INFO L226 Difference]: Without dead ends: 778 [2022-01-31 21:08:13,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3913 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=620, Invalid=14386, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:08:13,365 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 3496 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 3529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:13,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 265 Invalid, 3529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3496 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:08:13,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-01-31 21:08:13,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 753. [2022-01-31 21:08:13,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 748 states have (on average 1.282085561497326) internal successors, (959), 748 states have internal predecessors, (959), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 963 transitions. [2022-01-31 21:08:13,720 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 963 transitions. Word has length 69 [2022-01-31 21:08:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:13,720 INFO L470 AbstractCegarLoop]: Abstraction has 753 states and 963 transitions. [2022-01-31 21:08:13,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 963 transitions. [2022-01-31 21:08:13,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:08:13,721 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:13,721 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:13,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 21:08:13,721 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:13,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:13,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1569904622, now seen corresponding path program 78 times [2022-01-31 21:08:13,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:13,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027874768] [2022-01-31 21:08:13,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:13,820 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:13,859 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:13,919 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:13,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:13,952 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:13,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:13,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:14,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:14,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:15,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:15,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027874768] [2022-01-31 21:08:15,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027874768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:15,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:15,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:08:15,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887148254] [2022-01-31 21:08:15,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:15,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:08:15,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:08:15,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=4095, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:08:15,838 INFO L87 Difference]: Start difference. First operand 753 states and 963 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:18,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:18,674 INFO L93 Difference]: Finished difference Result 786 states and 998 transitions. [2022-01-31 21:08:18,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:18,675 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:18,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:18,676 INFO L225 Difference]: With dead ends: 786 [2022-01-31 21:08:18,676 INFO L226 Difference]: Without dead ends: 777 [2022-01-31 21:08:18,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2393 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=496, Invalid=14510, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:08:18,677 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4132 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 4164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:18,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 310 Invalid, 4164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:08:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-31 21:08:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 776. [2022-01-31 21:08:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 771 states have (on average 1.2736705577172502) internal successors, (982), 771 states have internal predecessors, (982), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:19,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 986 transitions. [2022-01-31 21:08:19,027 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 986 transitions. Word has length 69 [2022-01-31 21:08:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:19,027 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 986 transitions. [2022-01-31 21:08:19,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 986 transitions. [2022-01-31 21:08:19,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:08:19,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:19,028 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:19,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 21:08:19,028 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:19,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:19,028 INFO L85 PathProgramCache]: Analyzing trace with hash 715776998, now seen corresponding path program 79 times [2022-01-31 21:08:19,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:19,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016529220] [2022-01-31 21:08:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:19,130 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:19,177 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:19,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:19,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:19,271 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:19,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:19,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:19,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:20,736 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:20,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016529220] [2022-01-31 21:08:20,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016529220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:20,736 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:20,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:08:20,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968596112] [2022-01-31 21:08:20,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:20,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:08:20,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:20,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:08:20,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=3927, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:08:20,738 INFO L87 Difference]: Start difference. First operand 776 states and 986 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:23,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:23,135 INFO L93 Difference]: Finished difference Result 792 states and 1004 transitions. [2022-01-31 21:08:23,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:23,135 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:23,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:23,136 INFO L225 Difference]: With dead ends: 792 [2022-01-31 21:08:23,136 INFO L226 Difference]: Without dead ends: 783 [2022-01-31 21:08:23,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3212 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=573, Invalid=14189, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 21:08:23,137 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4493 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:23,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 295 Invalid, 4530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4493 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 21:08:23,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-31 21:08:23,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 778. [2022-01-31 21:08:23,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 773 states have (on average 1.2729624838292368) internal successors, (984), 773 states have internal predecessors, (984), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:23,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 988 transitions. [2022-01-31 21:08:23,478 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 988 transitions. Word has length 69 [2022-01-31 21:08:23,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:23,478 INFO L470 AbstractCegarLoop]: Abstraction has 778 states and 988 transitions. [2022-01-31 21:08:23,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:23,478 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 988 transitions. [2022-01-31 21:08:23,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:08:23,479 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:23,479 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:23,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 21:08:23,480 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:23,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:23,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1013217842, now seen corresponding path program 80 times [2022-01-31 21:08:23,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:23,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530914286] [2022-01-31 21:08:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:23,576 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:23,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:23,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:23,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:23,708 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:23,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:23,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:25,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:25,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530914286] [2022-01-31 21:08:25,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [530914286] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:25,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:25,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:08:25,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731156797] [2022-01-31 21:08:25,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:25,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:08:25,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:25,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:08:25,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3966, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:08:25,674 INFO L87 Difference]: Start difference. First operand 778 states and 988 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:29,150 INFO L93 Difference]: Finished difference Result 796 states and 1008 transitions. [2022-01-31 21:08:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:29,151 INFO L225 Difference]: With dead ends: 796 [2022-01-31 21:08:29,151 INFO L226 Difference]: Without dead ends: 787 [2022-01-31 21:08:29,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=493, Invalid=14269, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 21:08:29,152 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 4915 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 4955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:29,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 300 Invalid, 4955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4915 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:08:29,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2022-01-31 21:08:29,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 780. [2022-01-31 21:08:29,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 775 states have (on average 1.272258064516129) internal successors, (986), 775 states have internal predecessors, (986), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:29,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 990 transitions. [2022-01-31 21:08:29,501 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 990 transitions. Word has length 69 [2022-01-31 21:08:29,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:29,501 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 990 transitions. [2022-01-31 21:08:29,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 990 transitions. [2022-01-31 21:08:29,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:08:29,502 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:29,502 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:29,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 21:08:29,502 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1723570422, now seen corresponding path program 81 times [2022-01-31 21:08:29,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:29,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705514064] [2022-01-31 21:08:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:29,585 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:29,645 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:29,741 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:29,812 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:29,812 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:29,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:29,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:29,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:29,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:31,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:31,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705514064] [2022-01-31 21:08:31,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1705514064] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:31,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:31,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:08:31,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3192714] [2022-01-31 21:08:31,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:31,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:08:31,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:31,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:08:31,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=3966, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 21:08:31,735 INFO L87 Difference]: Start difference. First operand 780 states and 990 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:34,389 INFO L93 Difference]: Finished difference Result 798 states and 1010 transitions. [2022-01-31 21:08:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:34,391 INFO L225 Difference]: With dead ends: 798 [2022-01-31 21:08:34,391 INFO L226 Difference]: Without dead ends: 789 [2022-01-31 21:08:34,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2313 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=493, Invalid=14269, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 21:08:34,392 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 5031 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:34,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 300 Invalid, 5071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5031 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:08:34,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-01-31 21:08:34,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 782. [2022-01-31 21:08:34,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 777 states have (on average 1.2715572715572716) internal successors, (988), 777 states have internal predecessors, (988), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:34,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 992 transitions. [2022-01-31 21:08:34,735 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 992 transitions. Word has length 69 [2022-01-31 21:08:34,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:34,735 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 992 transitions. [2022-01-31 21:08:34,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:34,735 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 992 transitions. [2022-01-31 21:08:34,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-01-31 21:08:34,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:34,736 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:34,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 21:08:34,736 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:34,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:34,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1192466618, now seen corresponding path program 82 times [2022-01-31 21:08:34,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:34,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051930999] [2022-01-31 21:08:34,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:34,795 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:34,891 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:34,937 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:34,938 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:34,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:35,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:38,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051930999] [2022-01-31 21:08:38,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1051930999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:38,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:38,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 21:08:38,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024023481] [2022-01-31 21:08:38,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:38,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 21:08:38,009 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:38,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 21:08:38,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=4040, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 21:08:38,009 INFO L87 Difference]: Start difference. First operand 782 states and 992 transitions. Second operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:42,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:42,222 INFO L93 Difference]: Finished difference Result 813 states and 1024 transitions. [2022-01-31 21:08:42,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 21:08:42,222 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-01-31 21:08:42,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:42,223 INFO L225 Difference]: With dead ends: 813 [2022-01-31 21:08:42,223 INFO L226 Difference]: Without dead ends: 804 [2022-01-31 21:08:42,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2320 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=606, Invalid=14400, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 21:08:42,224 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 5557 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 5607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 5557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:42,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 310 Invalid, 5607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 5557 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:08:42,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2022-01-31 21:08:42,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 782. [2022-01-31 21:08:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 777 states have (on average 1.2586872586872586) internal successors, (978), 777 states have internal predecessors, (978), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 982 transitions. [2022-01-31 21:08:42,567 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 982 transitions. Word has length 69 [2022-01-31 21:08:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:42,567 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 982 transitions. [2022-01-31 21:08:42,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 61 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:42,567 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 982 transitions. [2022-01-31 21:08:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 21:08:42,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:42,568 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:42,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 21:08:42,568 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1482269917, now seen corresponding path program 83 times [2022-01-31 21:08:42,568 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:42,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657417238] [2022-01-31 21:08:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:42,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:42,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:42,660 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:08:42,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:46,071 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:46,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657417238] [2022-01-31 21:08:46,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1657417238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:46,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:46,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 21:08:46,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588582417] [2022-01-31 21:08:46,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:46,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 21:08:46,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:46,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 21:08:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4358, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:08:46,072 INFO L87 Difference]: Start difference. First operand 782 states and 982 transitions. Second operand has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:52,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:52,995 INFO L93 Difference]: Finished difference Result 886 states and 1117 transitions. [2022-01-31 21:08:52,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 21:08:52,996 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-01-31 21:08:52,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:52,997 INFO L225 Difference]: With dead ends: 886 [2022-01-31 21:08:52,997 INFO L226 Difference]: Without dead ends: 881 [2022-01-31 21:08:52,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=537, Invalid=16755, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 21:08:52,998 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 7831 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 7876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 7831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:52,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 330 Invalid, 7876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 7831 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 21:08:52,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-01-31 21:08:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 841. [2022-01-31 21:08:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 836 states have (on average 1.2751196172248804) internal successors, (1066), 836 states have internal predecessors, (1066), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:53,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1070 transitions. [2022-01-31 21:08:53,385 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1070 transitions. Word has length 70 [2022-01-31 21:08:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:53,385 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1070 transitions. [2022-01-31 21:08:53,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1070 transitions. [2022-01-31 21:08:53,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:08:53,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:53,387 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:53,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 21:08:53,387 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:53,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:53,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1736774996, now seen corresponding path program 84 times [2022-01-31 21:08:53,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:53,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516595403] [2022-01-31 21:08:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:53,514 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:53,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:53,679 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:53,725 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:08:53,726 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:08:53,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:08:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:53,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:08:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:08:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:08:55,851 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:08:55,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516595403] [2022-01-31 21:08:55,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [516595403] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:08:55,851 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:08:55,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:08:55,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829746554] [2022-01-31 21:08:55,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:08:55,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:08:55,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:08:55,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:08:55,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=4327, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:08:55,853 INFO L87 Difference]: Start difference. First operand 841 states and 1070 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:59,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:08:59,489 INFO L93 Difference]: Finished difference Result 877 states and 1108 transitions. [2022-01-31 21:08:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:08:59,489 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:08:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:08:59,491 INFO L225 Difference]: With dead ends: 877 [2022-01-31 21:08:59,491 INFO L226 Difference]: Without dead ends: 868 [2022-01-31 21:08:59,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3904 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=569, Invalid=15433, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:08:59,492 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 4339 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 4370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 4339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:08:59,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 325 Invalid, 4370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 4339 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:08:59,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2022-01-31 21:08:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 868. [2022-01-31 21:08:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 863 states have (on average 1.2665121668597914) internal successors, (1093), 863 states have internal predecessors, (1093), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:59,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1097 transitions. [2022-01-31 21:08:59,901 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1097 transitions. Word has length 71 [2022-01-31 21:08:59,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:08:59,901 INFO L470 AbstractCegarLoop]: Abstraction has 868 states and 1097 transitions. [2022-01-31 21:08:59,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:08:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1097 transitions. [2022-01-31 21:08:59,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:08:59,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:08:59,902 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:08:59,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 21:08:59,902 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:08:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:08:59,902 INFO L85 PathProgramCache]: Analyzing trace with hash -1020067984, now seen corresponding path program 85 times [2022-01-31 21:08:59,903 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:08:59,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883196075] [2022-01-31 21:08:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:08:59,999 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:00,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:00,110 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:00,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:00,144 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:00,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:00,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:00,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:00,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:02,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:02,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883196075] [2022-01-31 21:09:02,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883196075] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:02,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:02,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:02,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464939875] [2022-01-31 21:09:02,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:02,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:02,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:02,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:02,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=4355, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:09:02,157 INFO L87 Difference]: Start difference. First operand 868 states and 1097 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:05,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:05,249 INFO L93 Difference]: Finished difference Result 879 states and 1110 transitions. [2022-01-31 21:09:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:09:05,250 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:09:05,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:05,251 INFO L225 Difference]: With dead ends: 879 [2022-01-31 21:09:05,251 INFO L226 Difference]: Without dead ends: 870 [2022-01-31 21:09:05,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=512, Invalid=15490, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:09:05,252 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4394 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 4426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:05,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 320 Invalid, 4426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4394 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 21:09:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-01-31 21:09:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 870. [2022-01-31 21:09:05,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 865 states have (on average 1.2658959537572254) internal successors, (1095), 865 states have internal predecessors, (1095), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:05,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 1099 transitions. [2022-01-31 21:09:05,646 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 1099 transitions. Word has length 71 [2022-01-31 21:09:05,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:05,647 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 1099 transitions. [2022-01-31 21:09:05,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 1099 transitions. [2022-01-31 21:09:05,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:09:05,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:05,647 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:05,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 21:09:05,648 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:05,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:05,648 INFO L85 PathProgramCache]: Analyzing trace with hash 330396980, now seen corresponding path program 86 times [2022-01-31 21:09:05,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:05,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071352888] [2022-01-31 21:09:05,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:05,734 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:05,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:05,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:05,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:05,875 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:05,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:05,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:08,586 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:08,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071352888] [2022-01-31 21:09:08,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071352888] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:08,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:08,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:08,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560347915] [2022-01-31 21:09:08,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:08,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:08,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:08,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:08,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4356, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:09:08,588 INFO L87 Difference]: Start difference. First operand 870 states and 1099 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:12,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:12,025 INFO L93 Difference]: Finished difference Result 902 states and 1133 transitions. [2022-01-31 21:09:12,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:09:12,025 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:09:12,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:12,027 INFO L225 Difference]: With dead ends: 902 [2022-01-31 21:09:12,027 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 21:09:12,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2531 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=511, Invalid=15491, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:09:12,028 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4518 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:12,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 320 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4518 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:09:12,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 21:09:12,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 893. [2022-01-31 21:09:12,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 888 states have (on average 1.259009009009009) internal successors, (1118), 888 states have internal predecessors, (1118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1122 transitions. [2022-01-31 21:09:12,450 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1122 transitions. Word has length 71 [2022-01-31 21:09:12,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:12,450 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1122 transitions. [2022-01-31 21:09:12,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:12,450 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1122 transitions. [2022-01-31 21:09:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:09:12,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:12,450 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:12,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 21:09:12,451 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash 791680580, now seen corresponding path program 87 times [2022-01-31 21:09:12,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067029095] [2022-01-31 21:09:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:12,546 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:12,624 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:12,693 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:12,770 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:12,771 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:12,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:12,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:12,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:14,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:14,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067029095] [2022-01-31 21:09:14,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067029095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:14,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:14,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:14,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433164650] [2022-01-31 21:09:14,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:14,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:14,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:14,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:14,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=4183, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:09:14,686 INFO L87 Difference]: Start difference. First operand 893 states and 1122 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:17,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:17,968 INFO L93 Difference]: Finished difference Result 907 states and 1138 transitions. [2022-01-31 21:09:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:09:17,969 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:09:17,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:17,970 INFO L225 Difference]: With dead ends: 907 [2022-01-31 21:09:17,970 INFO L226 Difference]: Without dead ends: 898 [2022-01-31 21:09:17,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3511 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=589, Invalid=15161, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 21:09:17,971 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 37 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 4850 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 4850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:17,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 310 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 4850 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:09:17,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-01-31 21:09:18,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 895. [2022-01-31 21:09:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 890 states have (on average 1.2584269662921348) internal successors, (1120), 890 states have internal predecessors, (1120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:18,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1124 transitions. [2022-01-31 21:09:18,391 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1124 transitions. Word has length 71 [2022-01-31 21:09:18,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:18,391 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 1124 transitions. [2022-01-31 21:09:18,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:18,391 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1124 transitions. [2022-01-31 21:09:18,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:09:18,392 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:18,392 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:18,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 21:09:18,392 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:18,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:18,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1130477168, now seen corresponding path program 88 times [2022-01-31 21:09:18,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1466499337] [2022-01-31 21:09:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:18,539 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:18,604 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:18,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:18,763 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:18,763 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:18,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:18,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:18,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:21,599 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:21,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1466499337] [2022-01-31 21:09:21,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1466499337] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:21,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:21,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:21,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627626931] [2022-01-31 21:09:21,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:21,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:21,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:21,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:21,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=4292, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:09:21,601 INFO L87 Difference]: Start difference. First operand 895 states and 1124 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:26,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:26,330 INFO L93 Difference]: Finished difference Result 922 states and 1152 transitions. [2022-01-31 21:09:26,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:09:26,331 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:09:26,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:26,332 INFO L225 Difference]: With dead ends: 922 [2022-01-31 21:09:26,332 INFO L226 Difference]: Without dead ends: 913 [2022-01-31 21:09:26,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2818 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=644, Invalid=15358, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:09:26,333 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 5256 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 5256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:26,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 300 Invalid, 5306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 5256 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:09:26,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-31 21:09:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 888. [2022-01-31 21:09:26,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 883 states have (on average 1.2491506228765572) internal successors, (1103), 883 states have internal predecessors, (1103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1107 transitions. [2022-01-31 21:09:26,732 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1107 transitions. Word has length 71 [2022-01-31 21:09:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:26,733 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 1107 transitions. [2022-01-31 21:09:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1107 transitions. [2022-01-31 21:09:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:09:26,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:26,733 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:26,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 21:09:26,734 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:26,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1381447852, now seen corresponding path program 89 times [2022-01-31 21:09:26,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:26,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182475552] [2022-01-31 21:09:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:26,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:26,918 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:26,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:27,044 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:27,044 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:27,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:27,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:27,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:29,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:29,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182475552] [2022-01-31 21:09:29,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1182475552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:29,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:29,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:29,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866016372] [2022-01-31 21:09:29,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:29,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:29,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:29,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:29,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=4295, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:09:29,766 INFO L87 Difference]: Start difference. First operand 888 states and 1107 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:33,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:33,907 INFO L93 Difference]: Finished difference Result 917 states and 1137 transitions. [2022-01-31 21:09:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:09:33,907 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:09:33,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:33,908 INFO L225 Difference]: With dead ends: 917 [2022-01-31 21:09:33,908 INFO L226 Difference]: Without dead ends: 908 [2022-01-31 21:09:33,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2690 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=637, Invalid=15365, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:09:33,910 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 5373 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 5423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 5373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:33,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 300 Invalid, 5423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 5373 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:09:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2022-01-31 21:09:34,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 883. [2022-01-31 21:09:34,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 878 states have (on average 1.2391799544419135) internal successors, (1088), 878 states have internal predecessors, (1088), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:34,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 1092 transitions. [2022-01-31 21:09:34,305 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 1092 transitions. Word has length 71 [2022-01-31 21:09:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:34,305 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 1092 transitions. [2022-01-31 21:09:34,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 1092 transitions. [2022-01-31 21:09:34,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 21:09:34,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:34,306 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:34,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 21:09:34,306 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:34,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:34,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1202199076, now seen corresponding path program 90 times [2022-01-31 21:09:34,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:34,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [760610859] [2022-01-31 21:09:34,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:34,351 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:34,388 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:34,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:34,425 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:34,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:34,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:36,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:36,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [760610859] [2022-01-31 21:09:36,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [760610859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:36,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:36,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:36,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351890297] [2022-01-31 21:09:36,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:36,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:36,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:36,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:36,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4222, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 21:09:36,089 INFO L87 Difference]: Start difference. First operand 883 states and 1092 transitions. Second operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:39,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:39,306 INFO L93 Difference]: Finished difference Result 903 states and 1114 transitions. [2022-01-31 21:09:39,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:09:39,307 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 21:09:39,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:39,308 INFO L225 Difference]: With dead ends: 903 [2022-01-31 21:09:39,308 INFO L226 Difference]: Without dead ends: 894 [2022-01-31 21:09:39,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2452 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=509, Invalid=15241, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 21:09:39,309 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 5655 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 5695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 5655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:39,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 315 Invalid, 5695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 5655 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:09:39,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2022-01-31 21:09:39,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 886. [2022-01-31 21:09:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 881 states have (on average 1.2383654937570943) internal successors, (1091), 881 states have internal predecessors, (1091), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:39,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1095 transitions. [2022-01-31 21:09:39,712 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1095 transitions. Word has length 71 [2022-01-31 21:09:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:39,713 INFO L470 AbstractCegarLoop]: Abstraction has 886 states and 1095 transitions. [2022-01-31 21:09:39,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.046875) internal successors, (67), 63 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1095 transitions. [2022-01-31 21:09:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 21:09:39,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:39,713 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:39,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 21:09:39,714 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1592504897, now seen corresponding path program 91 times [2022-01-31 21:09:39,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:39,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608471163] [2022-01-31 21:09:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:39,778 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:39,856 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:39,856 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:09:39,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:39,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:39,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:43,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:43,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608471163] [2022-01-31 21:09:43,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1608471163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:43,562 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:43,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 21:09:43,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319677779] [2022-01-31 21:09:43,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:43,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 21:09:43,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:43,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 21:09:43,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=4626, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:09:43,563 INFO L87 Difference]: Start difference. First operand 886 states and 1095 transitions. Second operand has 68 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:50,235 INFO L93 Difference]: Finished difference Result 993 states and 1234 transitions. [2022-01-31 21:09:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 21:09:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-01-31 21:09:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:50,236 INFO L225 Difference]: With dead ends: 993 [2022-01-31 21:09:50,236 INFO L226 Difference]: Without dead ends: 988 [2022-01-31 21:09:50,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2872 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=553, Invalid=17807, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 21:09:50,237 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 8090 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 8135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 8090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:50,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 330 Invalid, 8135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 8090 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 21:09:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-01-31 21:09:50,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 947. [2022-01-31 21:09:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 942 states have (on average 1.2547770700636942) internal successors, (1182), 942 states have internal predecessors, (1182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 1186 transitions. [2022-01-31 21:09:50,665 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 1186 transitions. Word has length 72 [2022-01-31 21:09:50,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:50,666 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 1186 transitions. [2022-01-31 21:09:50,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 66 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:50,666 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 1186 transitions. [2022-01-31 21:09:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:09:50,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:50,666 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:50,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 21:09:50,667 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:50,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:50,667 INFO L85 PathProgramCache]: Analyzing trace with hash 964849862, now seen corresponding path program 92 times [2022-01-31 21:09:50,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:50,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395531637] [2022-01-31 21:09:50,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:50,771 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:50,821 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:50,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:50,934 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:50,934 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:50,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:51,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:09:53,341 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:09:53,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395531637] [2022-01-31 21:09:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [395531637] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:09:53,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:09:53,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 21:09:53,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234051425] [2022-01-31 21:09:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:09:53,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 21:09:53,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:09:53,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 21:09:53,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=4329, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 21:09:53,343 INFO L87 Difference]: Start difference. First operand 947 states and 1186 transitions. Second operand has 65 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:57,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:09:57,091 INFO L93 Difference]: Finished difference Result 959 states and 1200 transitions. [2022-01-31 21:09:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 21:09:57,091 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:09:57,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:09:57,093 INFO L225 Difference]: With dead ends: 959 [2022-01-31 21:09:57,093 INFO L226 Difference]: Without dead ends: 950 [2022-01-31 21:09:57,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3912 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=565, Invalid=15437, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 21:09:57,094 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 4276 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 4306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 4276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:09:57,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 325 Invalid, 4306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 4276 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:09:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-01-31 21:09:57,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 949. [2022-01-31 21:09:57,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 944 states have (on average 1.2542372881355932) internal successors, (1184), 944 states have internal predecessors, (1184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:57,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1188 transitions. [2022-01-31 21:09:57,538 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1188 transitions. Word has length 73 [2022-01-31 21:09:57,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:09:57,538 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1188 transitions. [2022-01-31 21:09:57,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.078125) internal successors, (69), 63 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:09:57,539 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1188 transitions. [2022-01-31 21:09:57,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:09:57,539 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:09:57,539 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:09:57,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 21:09:57,539 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:09:57,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:09:57,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1826259850, now seen corresponding path program 93 times [2022-01-31 21:09:57,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:09:57,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022094201] [2022-01-31 21:09:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:09:57,623 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:57,674 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:57,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:57,769 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:09:57,769 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:09:57,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:09:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:57,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:09:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:09:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:00,590 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:00,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022094201] [2022-01-31 21:10:00,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022094201] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:00,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:00,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:10:00,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967530689] [2022-01-31 21:10:00,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:00,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:10:00,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:00,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:10:00,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=4539, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:10:00,592 INFO L87 Difference]: Start difference. First operand 949 states and 1188 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:04,153 INFO L93 Difference]: Finished difference Result 958 states and 1198 transitions. [2022-01-31 21:10:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:10:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:10:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:04,163 INFO L225 Difference]: With dead ends: 958 [2022-01-31 21:10:04,163 INFO L226 Difference]: Without dead ends: 949 [2022-01-31 21:10:04,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4460 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=723, Invalid=16307, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:10:04,165 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 3529 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 3562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 3529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:04,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 260 Invalid, 3562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 3529 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:10:04,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2022-01-31 21:10:04,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 922. [2022-01-31 21:10:04,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 917 states have (on average 1.2595419847328244) internal successors, (1155), 917 states have internal predecessors, (1155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:04,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1159 transitions. [2022-01-31 21:10:04,590 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1159 transitions. Word has length 73 [2022-01-31 21:10:04,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:04,590 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1159 transitions. [2022-01-31 21:10:04,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:04,590 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1159 transitions. [2022-01-31 21:10:04,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:10:04,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:04,591 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:04,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 21:10:04,591 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:04,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:04,592 INFO L85 PathProgramCache]: Analyzing trace with hash -908036274, now seen corresponding path program 94 times [2022-01-31 21:10:04,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:04,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204199276] [2022-01-31 21:10:04,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:04,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:04,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:04,847 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:04,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:04,904 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:04,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:04,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:05,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:05,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:05,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:11,286 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:11,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204199276] [2022-01-31 21:10:11,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [204199276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:11,286 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:11,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:10:11,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635700359] [2022-01-31 21:10:11,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:11,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:10:11,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:11,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:10:11,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4624, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:10:11,287 INFO L87 Difference]: Start difference. First operand 922 states and 1159 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:11,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:11,930 INFO L93 Difference]: Finished difference Result 933 states and 1172 transitions. [2022-01-31 21:10:11,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:10:11,931 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:10:11,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:11,944 INFO L225 Difference]: With dead ends: 933 [2022-01-31 21:10:11,944 INFO L226 Difference]: Without dead ends: 924 [2022-01-31 21:10:11,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=232, Invalid=5170, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:10:11,945 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 557 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:11,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 330 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 557 Unchecked, 0.0s Time] [2022-01-31 21:10:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2022-01-31 21:10:12,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 924. [2022-01-31 21:10:12,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 919 states have (on average 1.2589771490750816) internal successors, (1157), 919 states have internal predecessors, (1157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 1161 transitions. [2022-01-31 21:10:12,371 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 1161 transitions. Word has length 73 [2022-01-31 21:10:12,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:12,371 INFO L470 AbstractCegarLoop]: Abstraction has 924 states and 1161 transitions. [2022-01-31 21:10:12,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:12,371 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 1161 transitions. [2022-01-31 21:10:12,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:10:12,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:12,372 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:12,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 21:10:12,372 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:12,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:12,372 INFO L85 PathProgramCache]: Analyzing trace with hash -191329262, now seen corresponding path program 95 times [2022-01-31 21:10:12,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:12,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893566839] [2022-01-31 21:10:12,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:12,497 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:12,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:12,638 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:12,706 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:12,706 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:12,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:12,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:12,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:15,547 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:15,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893566839] [2022-01-31 21:10:15,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [893566839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:15,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:15,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:10:15,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369967446] [2022-01-31 21:10:15,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:15,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:10:15,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:10:15,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=4568, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:10:15,549 INFO L87 Difference]: Start difference. First operand 924 states and 1161 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:19,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:19,129 INFO L93 Difference]: Finished difference Result 936 states and 1175 transitions. [2022-01-31 21:10:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:10:19,130 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:10:19,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:19,131 INFO L225 Difference]: With dead ends: 936 [2022-01-31 21:10:19,131 INFO L226 Difference]: Without dead ends: 927 [2022-01-31 21:10:19,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2599 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=639, Invalid=16391, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:10:19,132 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 4792 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 4825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 4792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:19,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 330 Invalid, 4825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 4792 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:10:19,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2022-01-31 21:10:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 926. [2022-01-31 21:10:19,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 921 states have (on average 1.258414766558089) internal successors, (1159), 921 states have internal predecessors, (1159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1163 transitions. [2022-01-31 21:10:19,546 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1163 transitions. Word has length 73 [2022-01-31 21:10:19,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:19,546 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 1163 transitions. [2022-01-31 21:10:19,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1163 transitions. [2022-01-31 21:10:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:10:19,547 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:19,547 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:19,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 21:10:19,547 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1159135702, now seen corresponding path program 96 times [2022-01-31 21:10:19,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116158910] [2022-01-31 21:10:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:19,719 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:19,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:19,871 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:19,917 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:19,917 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:19,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:19,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:20,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:22,321 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:22,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116158910] [2022-01-31 21:10:22,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [116158910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:22,322 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:22,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:10:22,322 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309914576] [2022-01-31 21:10:22,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:22,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:10:22,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:22,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:10:22,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4624, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:10:22,323 INFO L87 Difference]: Start difference. First operand 926 states and 1163 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:26,362 INFO L93 Difference]: Finished difference Result 959 states and 1198 transitions. [2022-01-31 21:10:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:10:26,363 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:10:26,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:26,364 INFO L225 Difference]: With dead ends: 959 [2022-01-31 21:10:26,364 INFO L226 Difference]: Without dead ends: 950 [2022-01-31 21:10:26,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2678 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=527, Invalid=16503, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:10:26,365 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 4994 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 5028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:26,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 335 Invalid, 5028 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4994 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:10:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-01-31 21:10:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 949. [2022-01-31 21:10:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 949 states, 944 states have (on average 1.2521186440677967) internal successors, (1182), 944 states have internal predecessors, (1182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 949 states to 949 states and 1186 transitions. [2022-01-31 21:10:26,814 INFO L78 Accepts]: Start accepts. Automaton has 949 states and 1186 transitions. Word has length 73 [2022-01-31 21:10:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:26,814 INFO L470 AbstractCegarLoop]: Abstraction has 949 states and 1186 transitions. [2022-01-31 21:10:26,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 949 states and 1186 transitions. [2022-01-31 21:10:26,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:10:26,815 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:26,816 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:26,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 21:10:26,816 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:26,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash 720578850, now seen corresponding path program 97 times [2022-01-31 21:10:26,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:26,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307548244] [2022-01-31 21:10:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:26,933 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:26,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:27,043 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:27,094 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:27,094 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:27,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:27,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:27,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:29,818 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:29,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307548244] [2022-01-31 21:10:29,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307548244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:29,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:29,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:10:29,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100500544] [2022-01-31 21:10:29,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:29,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:10:29,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:29,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:10:29,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4550, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:10:29,820 INFO L87 Difference]: Start difference. First operand 949 states and 1186 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:34,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:34,251 INFO L93 Difference]: Finished difference Result 971 states and 1209 transitions. [2022-01-31 21:10:34,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:10:34,251 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:10:34,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:34,252 INFO L225 Difference]: With dead ends: 971 [2022-01-31 21:10:34,252 INFO L226 Difference]: Without dead ends: 962 [2022-01-31 21:10:34,253 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3523 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=688, Invalid=16342, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:10:34,253 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 4850 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 4897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 4850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:34,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 290 Invalid, 4897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 4850 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:10:34,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-31 21:10:34,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 934. [2022-01-31 21:10:34,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 929 states have (on average 1.2454251883745964) internal successors, (1157), 929 states have internal predecessors, (1157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:34,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1161 transitions. [2022-01-31 21:10:34,684 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1161 transitions. Word has length 73 [2022-01-31 21:10:34,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:34,695 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 1161 transitions. [2022-01-31 21:10:34,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:34,695 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1161 transitions. [2022-01-31 21:10:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:10:34,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:34,697 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:34,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 21:10:34,697 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:34,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:34,698 INFO L85 PathProgramCache]: Analyzing trace with hash 157643450, now seen corresponding path program 98 times [2022-01-31 21:10:34,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:34,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144751485] [2022-01-31 21:10:34,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:34,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:34,841 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:34,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:34,964 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:34,964 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:34,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:35,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:37,178 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:37,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144751485] [2022-01-31 21:10:37,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144751485] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:37,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:37,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:10:37,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363997939] [2022-01-31 21:10:37,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:37,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:10:37,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:37,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:10:37,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4435, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 21:10:37,180 INFO L87 Difference]: Start difference. First operand 934 states and 1161 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:40,357 INFO L93 Difference]: Finished difference Result 954 states and 1183 transitions. [2022-01-31 21:10:40,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:10:40,357 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:10:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:40,372 INFO L225 Difference]: With dead ends: 954 [2022-01-31 21:10:40,372 INFO L226 Difference]: Without dead ends: 945 [2022-01-31 21:10:40,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2950 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=629, Invalid=16141, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 21:10:40,373 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 6155 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 6195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 6155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:40,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 335 Invalid, 6195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 6155 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:10:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-01-31 21:10:40,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 936. [2022-01-31 21:10:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 931 states have (on average 1.2448979591836735) internal successors, (1159), 931 states have internal predecessors, (1159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:40,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1163 transitions. [2022-01-31 21:10:40,803 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1163 transitions. Word has length 73 [2022-01-31 21:10:40,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:40,804 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1163 transitions. [2022-01-31 21:10:40,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:40,804 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1163 transitions. [2022-01-31 21:10:40,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-01-31 21:10:40,804 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:40,804 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:40,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 21:10:40,805 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:40,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:40,805 INFO L85 PathProgramCache]: Analyzing trace with hash -373460354, now seen corresponding path program 99 times [2022-01-31 21:10:40,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:40,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170319584] [2022-01-31 21:10:40,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:40,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:40,979 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:41,011 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:41,011 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:10:41,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:41,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:41,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:44,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:44,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170319584] [2022-01-31 21:10:44,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1170319584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:44,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:44,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 21:10:44,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521166969] [2022-01-31 21:10:44,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:44,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 21:10:44,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 21:10:44,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=4565, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 21:10:44,457 INFO L87 Difference]: Start difference. First operand 936 states and 1163 transitions. Second operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:10:50,324 INFO L93 Difference]: Finished difference Result 971 states and 1199 transitions. [2022-01-31 21:10:50,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 21:10:50,324 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-01-31 21:10:50,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:10:50,326 INFO L225 Difference]: With dead ends: 971 [2022-01-31 21:10:50,326 INFO L226 Difference]: Without dead ends: 962 [2022-01-31 21:10:50,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=645, Invalid=16385, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 21:10:50,327 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 6539 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 6589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 6539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:10:50,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 335 Invalid, 6589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 6539 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 21:10:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2022-01-31 21:10:50,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 936. [2022-01-31 21:10:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 931 states have (on average 1.234156820622986) internal successors, (1149), 931 states have internal predecessors, (1149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1153 transitions. [2022-01-31 21:10:50,747 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1153 transitions. Word has length 73 [2022-01-31 21:10:50,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:10:50,747 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 1153 transitions. [2022-01-31 21:10:50,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:10:50,747 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1153 transitions. [2022-01-31 21:10:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 21:10:50,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:10:50,748 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:10:50,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 21:10:50,748 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:10:50,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:10:50,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1513601503, now seen corresponding path program 100 times [2022-01-31 21:10:50,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:10:50,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942502440] [2022-01-31 21:10:50,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:10:50,800 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:50,915 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:10:50,916 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:10:50,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:10:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:50,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:10:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:10:50,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:10:54,615 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:10:54,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942502440] [2022-01-31 21:10:54,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [942502440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:10:54,616 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:10:54,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 21:10:54,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617415107] [2022-01-31 21:10:54,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:10:54,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 21:10:54,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:10:54,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 21:10:54,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4902, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:10:54,617 INFO L87 Difference]: Start difference. First operand 936 states and 1153 transitions. Second operand has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:01,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:01,163 INFO L93 Difference]: Finished difference Result 1048 states and 1298 transitions. [2022-01-31 21:11:01,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 21:11:01,163 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-01-31 21:11:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:01,164 INFO L225 Difference]: With dead ends: 1048 [2022-01-31 21:11:01,164 INFO L226 Difference]: Without dead ends: 1043 [2022-01-31 21:11:01,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3029 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=569, Invalid=18891, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 21:11:01,165 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 8865 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 8910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 8865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:01,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 350 Invalid, 8910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 8865 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 21:11:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1043 states. [2022-01-31 21:11:01,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1043 to 999. [2022-01-31 21:11:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 994 states have (on average 1.2505030181086518) internal successors, (1243), 994 states have internal predecessors, (1243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:01,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1247 transitions. [2022-01-31 21:11:01,662 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1247 transitions. Word has length 74 [2022-01-31 21:11:01,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:01,662 INFO L470 AbstractCegarLoop]: Abstraction has 999 states and 1247 transitions. [2022-01-31 21:11:01,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 68 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1247 transitions. [2022-01-31 21:11:01,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:11:01,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:01,663 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:01,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 21:11:01,663 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:01,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:01,663 INFO L85 PathProgramCache]: Analyzing trace with hash -619745364, now seen corresponding path program 101 times [2022-01-31 21:11:01,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:01,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955623419] [2022-01-31 21:11:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:01,791 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:01,864 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:01,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:02,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:02,006 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:02,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:02,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:02,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:02,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:04,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955623419] [2022-01-31 21:11:04,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [955623419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:04,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:04,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:11:04,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345234147] [2022-01-31 21:11:04,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:04,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:11:04,833 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:11:04,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:11:04,834 INFO L87 Difference]: Start difference. First operand 999 states and 1247 transitions. Second operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:08,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:08,329 INFO L93 Difference]: Finished difference Result 1011 states and 1261 transitions. [2022-01-31 21:11:08,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:11:08,330 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 21:11:08,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:08,331 INFO L225 Difference]: With dead ends: 1011 [2022-01-31 21:11:08,331 INFO L226 Difference]: Without dead ends: 1002 [2022-01-31 21:11:08,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2658 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=661, Invalid=17429, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:11:08,332 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 5016 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 5048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 5016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:08,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 345 Invalid, 5048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 5016 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 21:11:08,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2022-01-31 21:11:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 1001. [2022-01-31 21:11:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 996 states have (on average 1.25) internal successors, (1245), 996 states have internal predecessors, (1245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:08,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 1249 transitions. [2022-01-31 21:11:08,798 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 1249 transitions. Word has length 75 [2022-01-31 21:11:08,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:08,798 INFO L470 AbstractCegarLoop]: Abstraction has 1001 states and 1249 transitions. [2022-01-31 21:11:08,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:08,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 1249 transitions. [2022-01-31 21:11:08,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:11:08,798 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:08,798 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:08,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 21:11:08,799 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:08,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:08,799 INFO L85 PathProgramCache]: Analyzing trace with hash 940925808, now seen corresponding path program 102 times [2022-01-31 21:11:08,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:08,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159967726] [2022-01-31 21:11:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:08,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:08,969 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:09,030 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:09,072 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:09,072 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:09,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:09,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:09,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:11,543 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:11,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159967726] [2022-01-31 21:11:11,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159967726] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:11,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:11,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:11:11,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712462557] [2022-01-31 21:11:11,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:11,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:11:11,544 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:11,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:11:11,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=4867, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:11:11,545 INFO L87 Difference]: Start difference. First operand 1001 states and 1249 transitions. Second operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:15,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:15,520 INFO L93 Difference]: Finished difference Result 1013 states and 1263 transitions. [2022-01-31 21:11:15,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:11:15,520 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 21:11:15,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:15,521 INFO L225 Difference]: With dead ends: 1013 [2022-01-31 21:11:15,521 INFO L226 Difference]: Without dead ends: 1004 [2022-01-31 21:11:15,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4398 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=609, Invalid=17481, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:11:15,522 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 5074 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 5107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:15,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 340 Invalid, 5107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5074 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:11:15,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-01-31 21:11:15,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 1003. [2022-01-31 21:11:15,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 998 states have (on average 1.249498997995992) internal successors, (1247), 998 states have internal predecessors, (1247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:15,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1251 transitions. [2022-01-31 21:11:15,973 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1251 transitions. Word has length 75 [2022-01-31 21:11:15,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:15,973 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1251 transitions. [2022-01-31 21:11:15,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1251 transitions. [2022-01-31 21:11:15,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:11:15,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:15,974 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:15,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 21:11:15,974 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:15,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:15,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1657632820, now seen corresponding path program 103 times [2022-01-31 21:11:15,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:15,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935681611] [2022-01-31 21:11:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:16,132 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:16,191 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:16,258 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:16,304 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:16,304 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:16,304 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:16,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:16,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:19,240 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:19,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935681611] [2022-01-31 21:11:19,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935681611] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:19,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:19,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:11:19,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597929265] [2022-01-31 21:11:19,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:19,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:11:19,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:19,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:11:19,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=4817, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:11:19,241 INFO L87 Difference]: Start difference. First operand 1003 states and 1251 transitions. Second operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:23,432 INFO L93 Difference]: Finished difference Result 1018 states and 1267 transitions. [2022-01-31 21:11:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:11:23,433 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 21:11:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:23,434 INFO L225 Difference]: With dead ends: 1018 [2022-01-31 21:11:23,434 INFO L226 Difference]: Without dead ends: 1009 [2022-01-31 21:11:23,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=731, Invalid=17359, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:11:23,435 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 4191 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 4227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:23,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 270 Invalid, 4227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4191 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:11:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-01-31 21:11:23,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 980. [2022-01-31 21:11:23,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 975 states have (on average 1.2533333333333334) internal successors, (1222), 975 states have internal predecessors, (1222), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1226 transitions. [2022-01-31 21:11:23,884 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1226 transitions. Word has length 75 [2022-01-31 21:11:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:23,884 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1226 transitions. [2022-01-31 21:11:23,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1226 transitions. [2022-01-31 21:11:23,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:11:23,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:23,885 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:23,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 21:11:23,885 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1286869512, now seen corresponding path program 104 times [2022-01-31 21:11:23,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:23,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868956475] [2022-01-31 21:11:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:23,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:24,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:24,129 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:24,194 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:24,194 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:24,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:24,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:27,345 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:27,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868956475] [2022-01-31 21:11:27,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [868956475] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:27,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:27,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:11:27,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233594867] [2022-01-31 21:11:27,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:27,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:11:27,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:11:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4853, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:11:27,347 INFO L87 Difference]: Start difference. First operand 980 states and 1226 transitions. Second operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:31,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:31,624 INFO L93 Difference]: Finished difference Result 998 states and 1245 transitions. [2022-01-31 21:11:31,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:11:31,624 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 21:11:31,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:31,625 INFO L225 Difference]: With dead ends: 998 [2022-01-31 21:11:31,626 INFO L226 Difference]: Without dead ends: 989 [2022-01-31 21:11:31,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4350 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=657, Invalid=17433, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 21:11:31,626 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 32 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4706 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:31,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 295 Invalid, 4742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4706 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:11:31,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 989 states. [2022-01-31 21:11:32,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 989 to 980. [2022-01-31 21:11:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 975 states have (on average 1.2523076923076923) internal successors, (1221), 975 states have internal predecessors, (1221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1225 transitions. [2022-01-31 21:11:32,085 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1225 transitions. Word has length 75 [2022-01-31 21:11:32,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:32,085 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1225 transitions. [2022-01-31 21:11:32,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1225 transitions. [2022-01-31 21:11:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:11:32,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:32,086 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:32,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 21:11:32,086 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:32,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:32,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1296252952, now seen corresponding path program 105 times [2022-01-31 21:11:32,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:32,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [225883032] [2022-01-31 21:11:32,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:32,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:32,249 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:32,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:32,352 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:32,352 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:32,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:32,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:32,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:34,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:34,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [225883032] [2022-01-31 21:11:34,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [225883032] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:34,344 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:34,344 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:11:34,344 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26563021] [2022-01-31 21:11:34,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:34,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:11:34,344 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:34,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:11:34,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=4707, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:11:34,345 INFO L87 Difference]: Start difference. First operand 980 states and 1225 transitions. Second operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:37,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:37,647 INFO L93 Difference]: Finished difference Result 1001 states and 1248 transitions. [2022-01-31 21:11:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:11:37,647 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 21:11:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:37,649 INFO L225 Difference]: With dead ends: 1001 [2022-01-31 21:11:37,649 INFO L226 Difference]: Without dead ends: 992 [2022-01-31 21:11:37,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3305 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=645, Invalid=17177, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 21:11:37,660 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 6382 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 6422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 6382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:37,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 340 Invalid, 6422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 6382 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:11:37,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-31 21:11:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 982. [2022-01-31 21:11:38,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 977 states have (on average 1.2517911975435005) internal successors, (1223), 977 states have internal predecessors, (1223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:38,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1227 transitions. [2022-01-31 21:11:38,129 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1227 transitions. Word has length 75 [2022-01-31 21:11:38,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:38,129 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1227 transitions. [2022-01-31 21:11:38,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:38,130 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1227 transitions. [2022-01-31 21:11:38,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 21:11:38,130 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:38,131 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:38,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 21:11:38,131 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:38,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:38,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1475501728, now seen corresponding path program 106 times [2022-01-31 21:11:38,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:38,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598506865] [2022-01-31 21:11:38,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:38,187 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:38,248 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:38,274 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:38,274 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:11:38,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:38,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:38,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:38,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:38,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:42,049 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598506865] [2022-01-31 21:11:42,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [598506865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:42,049 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:42,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:11:42,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394050767] [2022-01-31 21:11:42,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:42,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:11:42,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:42,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:11:42,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=4839, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 21:11:42,050 INFO L87 Difference]: Start difference. First operand 982 states and 1227 transitions. Second operand has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:47,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:47,716 INFO L93 Difference]: Finished difference Result 1021 states and 1268 transitions. [2022-01-31 21:11:47,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:11:47,716 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 21:11:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:47,717 INFO L225 Difference]: With dead ends: 1021 [2022-01-31 21:11:47,717 INFO L226 Difference]: Without dead ends: 1012 [2022-01-31 21:11:47,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2625 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=645, Invalid=16911, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 21:11:47,718 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 6672 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 6827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 6672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:47,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 340 Invalid, 6827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 6672 Invalid, 0 Unknown, 104 Unchecked, 2.2s Time] [2022-01-31 21:11:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-01-31 21:11:48,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 982. [2022-01-31 21:11:48,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 982 states, 977 states have (on average 1.2415557830092119) internal successors, (1213), 977 states have internal predecessors, (1213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1217 transitions. [2022-01-31 21:11:48,189 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1217 transitions. Word has length 75 [2022-01-31 21:11:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:11:48,189 INFO L470 AbstractCegarLoop]: Abstraction has 982 states and 1217 transitions. [2022-01-31 21:11:48,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 67 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1217 transitions. [2022-01-31 21:11:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 21:11:48,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:11:48,190 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:11:48,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 21:11:48,190 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:11:48,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:11:48,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1298116099, now seen corresponding path program 107 times [2022-01-31 21:11:48,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:11:48,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921156224] [2022-01-31 21:11:48,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:11:48,231 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:48,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:11:48,310 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:11:48,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:11:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:48,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:11:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:11:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:11:52,040 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:11:52,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921156224] [2022-01-31 21:11:52,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [921156224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:11:52,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:11:52,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 21:11:52,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234816095] [2022-01-31 21:11:52,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:11:52,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 21:11:52,040 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:11:52,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 21:11:52,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=5186, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:11:52,041 INFO L87 Difference]: Start difference. First operand 982 states and 1217 transitions. Second operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:11:59,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:11:59,600 INFO L93 Difference]: Finished difference Result 1099 states and 1368 transitions. [2022-01-31 21:11:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 21:11:59,601 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-01-31 21:11:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:11:59,602 INFO L225 Difference]: With dead ends: 1099 [2022-01-31 21:11:59,602 INFO L226 Difference]: Without dead ends: 1094 [2022-01-31 21:11:59,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3190 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=585, Invalid=20007, Unknown=0, NotChecked=0, Total=20592 [2022-01-31 21:11:59,603 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 9140 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 9185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 9140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:11:59,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 350 Invalid, 9185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 9140 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 21:11:59,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2022-01-31 21:12:00,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1047. [2022-01-31 21:12:00,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1042 states have (on average 1.2571976967370442) internal successors, (1310), 1042 states have internal predecessors, (1310), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:00,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1314 transitions. [2022-01-31 21:12:00,109 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1314 transitions. Word has length 76 [2022-01-31 21:12:00,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:00,109 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1314 transitions. [2022-01-31 21:12:00,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:00,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1314 transitions. [2022-01-31 21:12:00,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:00,110 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:00,110 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:00,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 21:12:00,123 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:00,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1631365434, now seen corresponding path program 108 times [2022-01-31 21:12:00,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:00,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752444618] [2022-01-31 21:12:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:00,251 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:00,324 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:00,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:00,464 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:00,464 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:00,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:00,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:00,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:05,438 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:05,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752444618] [2022-01-31 21:12:05,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [752444618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:05,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:05,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 21:12:05,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529044276] [2022-01-31 21:12:05,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:05,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 21:12:05,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:05,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 21:12:05,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=4733, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 21:12:05,439 INFO L87 Difference]: Start difference. First operand 1047 states and 1314 transitions. Second operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:06,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:06,130 INFO L93 Difference]: Finished difference Result 1056 states and 1324 transitions. [2022-01-31 21:12:06,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 21:12:06,130 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:12:06,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:06,131 INFO L225 Difference]: With dead ends: 1056 [2022-01-31 21:12:06,131 INFO L226 Difference]: Without dead ends: 1016 [2022-01-31 21:12:06,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=263, Invalid=5287, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 21:12:06,132 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 301 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:06,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 276 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 301 Unchecked, 0.1s Time] [2022-01-31 21:12:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-31 21:12:06,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1016. [2022-01-31 21:12:06,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1011 states have (on average 1.2631058358061324) internal successors, (1277), 1011 states have internal predecessors, (1277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:06,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1281 transitions. [2022-01-31 21:12:06,626 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1281 transitions. Word has length 77 [2022-01-31 21:12:06,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:06,626 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 1281 transitions. [2022-01-31 21:12:06,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 67 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:06,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1281 transitions. [2022-01-31 21:12:06,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:06,626 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:06,626 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:06,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 21:12:06,627 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:06,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1549912202, now seen corresponding path program 109 times [2022-01-31 21:12:06,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:06,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143534029] [2022-01-31 21:12:06,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:06,714 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:06,759 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:06,811 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:06,862 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:06,862 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:06,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:06,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:06,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:09,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:09,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143534029] [2022-01-31 21:12:09,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [143534029] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:09,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:09,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:12:09,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442697130] [2022-01-31 21:12:09,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:09,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:12:09,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:09,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:12:09,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=5123, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:12:09,559 INFO L87 Difference]: Start difference. First operand 1016 states and 1281 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:14,029 INFO L93 Difference]: Finished difference Result 1027 states and 1294 transitions. [2022-01-31 21:12:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:12:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:12:14,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:14,031 INFO L225 Difference]: With dead ends: 1027 [2022-01-31 21:12:14,031 INFO L226 Difference]: Without dead ends: 1018 [2022-01-31 21:12:14,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2809 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=681, Invalid=18501, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:12:14,032 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 5167 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 5198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 5167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:14,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 355 Invalid, 5198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 5167 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:12:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-01-31 21:12:14,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 1018. [2022-01-31 21:12:14,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1013 states have (on average 1.2625863770977295) internal successors, (1279), 1013 states have internal predecessors, (1279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 1283 transitions. [2022-01-31 21:12:14,533 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 1283 transitions. Word has length 77 [2022-01-31 21:12:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:14,533 INFO L470 AbstractCegarLoop]: Abstraction has 1018 states and 1283 transitions. [2022-01-31 21:12:14,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 1283 transitions. [2022-01-31 21:12:14,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:14,534 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:14,534 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:14,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 21:12:14,534 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1883645106, now seen corresponding path program 110 times [2022-01-31 21:12:14,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:14,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882774037] [2022-01-31 21:12:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:14,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:14,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:14,723 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:14,766 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:14,766 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:14,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:14,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:14,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:17,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882774037] [2022-01-31 21:12:17,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [882774037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:17,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:17,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:12:17,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374649612] [2022-01-31 21:12:17,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:17,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:12:17,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:17,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:12:17,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=5183, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:12:17,884 INFO L87 Difference]: Start difference. First operand 1018 states and 1283 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:22,592 INFO L93 Difference]: Finished difference Result 1029 states and 1296 transitions. [2022-01-31 21:12:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:12:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:12:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:22,593 INFO L225 Difference]: With dead ends: 1029 [2022-01-31 21:12:22,593 INFO L226 Difference]: Without dead ends: 1020 [2022-01-31 21:12:22,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2995 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=560, Invalid=18622, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:12:22,594 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 5304 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 5336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 5304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:22,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 355 Invalid, 5336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 5304 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:12:22,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2022-01-31 21:12:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 1020. [2022-01-31 21:12:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1020 states, 1015 states have (on average 1.2620689655172415) internal successors, (1281), 1015 states have internal predecessors, (1281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:23,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1020 states to 1020 states and 1285 transitions. [2022-01-31 21:12:23,091 INFO L78 Accepts]: Start accepts. Automaton has 1020 states and 1285 transitions. Word has length 77 [2022-01-31 21:12:23,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:23,091 INFO L470 AbstractCegarLoop]: Abstraction has 1020 states and 1285 transitions. [2022-01-31 21:12:23,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:23,091 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states and 1285 transitions. [2022-01-31 21:12:23,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:23,093 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:23,093 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:23,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 21:12:23,093 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:23,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash -322973934, now seen corresponding path program 111 times [2022-01-31 21:12:23,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:23,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590678047] [2022-01-31 21:12:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:23,225 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:23,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:23,374 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:23,442 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:23,443 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:23,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:23,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:25,964 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590678047] [2022-01-31 21:12:25,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [590678047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:25,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:25,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:12:25,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357433538] [2022-01-31 21:12:25,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:25,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:12:25,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:25,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:12:25,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=5123, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:12:25,965 INFO L87 Difference]: Start difference. First operand 1020 states and 1285 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:29,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:29,818 INFO L93 Difference]: Finished difference Result 1056 states and 1323 transitions. [2022-01-31 21:12:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:12:29,819 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:12:29,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:29,820 INFO L225 Difference]: With dead ends: 1056 [2022-01-31 21:12:29,820 INFO L226 Difference]: Without dead ends: 1047 [2022-01-31 21:12:29,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2805 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=681, Invalid=18501, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:12:29,821 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5363 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 5396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 5363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:29,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 350 Invalid, 5396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 5363 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:12:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2022-01-31 21:12:30,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1047. [2022-01-31 21:12:30,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1042 states have (on average 1.255278310940499) internal successors, (1308), 1042 states have internal predecessors, (1308), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1312 transitions. [2022-01-31 21:12:30,332 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1312 transitions. Word has length 77 [2022-01-31 21:12:30,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:30,332 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1312 transitions. [2022-01-31 21:12:30,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:30,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1312 transitions. [2022-01-31 21:12:30,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:30,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:30,333 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:30,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 21:12:30,333 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:30,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:30,333 INFO L85 PathProgramCache]: Analyzing trace with hash 393733078, now seen corresponding path program 112 times [2022-01-31 21:12:30,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:30,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565788470] [2022-01-31 21:12:30,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:30,439 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:30,500 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:30,581 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:30,625 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:30,625 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:30,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:30,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:33,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:33,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565788470] [2022-01-31 21:12:33,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [565788470] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:33,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:33,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:12:33,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586710845] [2022-01-31 21:12:33,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:33,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:12:33,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:33,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:12:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=5133, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:12:33,825 INFO L87 Difference]: Start difference. First operand 1047 states and 1312 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:37,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:37,763 INFO L93 Difference]: Finished difference Result 1062 states and 1328 transitions. [2022-01-31 21:12:37,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:12:37,763 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:12:37,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:37,764 INFO L225 Difference]: With dead ends: 1062 [2022-01-31 21:12:37,764 INFO L226 Difference]: Without dead ends: 1053 [2022-01-31 21:12:37,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4712 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=683, Invalid=18499, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:12:37,765 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 4988 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 5023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:37,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 305 Invalid, 5023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4988 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:12:37,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-01-31 21:12:38,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 1047. [2022-01-31 21:12:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1042 states have (on average 1.2543186180422266) internal successors, (1307), 1042 states have internal predecessors, (1307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 1311 transitions. [2022-01-31 21:12:38,262 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 1311 transitions. Word has length 77 [2022-01-31 21:12:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:38,263 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 1311 transitions. [2022-01-31 21:12:38,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:38,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 1311 transitions. [2022-01-31 21:12:38,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:38,263 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:38,263 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:38,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 21:12:38,264 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:38,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:38,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1744198042, now seen corresponding path program 113 times [2022-01-31 21:12:38,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:38,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263791901] [2022-01-31 21:12:38,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:38,345 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:38,387 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:38,434 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:38,478 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:38,478 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:38,478 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:38,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:38,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:40,837 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:40,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263791901] [2022-01-31 21:12:40,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [263791901] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:40,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:40,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:12:40,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980891282] [2022-01-31 21:12:40,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:40,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:12:40,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:40,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:12:40,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=5123, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:12:40,839 INFO L87 Difference]: Start difference. First operand 1047 states and 1311 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:44,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:44,425 INFO L93 Difference]: Finished difference Result 1080 states and 1346 transitions. [2022-01-31 21:12:44,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:12:44,425 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:12:44,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:44,426 INFO L225 Difference]: With dead ends: 1080 [2022-01-31 21:12:44,426 INFO L226 Difference]: Without dead ends: 1071 [2022-01-31 21:12:44,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=681, Invalid=18501, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:12:44,427 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 5634 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 5669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:44,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 350 Invalid, 5669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5634 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 21:12:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-01-31 21:12:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 1070. [2022-01-31 21:12:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 1065 states have (on average 1.2488262910798122) internal successors, (1330), 1065 states have internal predecessors, (1330), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:44,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1334 transitions. [2022-01-31 21:12:44,946 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1334 transitions. Word has length 77 [2022-01-31 21:12:44,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:44,946 INFO L470 AbstractCegarLoop]: Abstraction has 1070 states and 1334 transitions. [2022-01-31 21:12:44,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:44,947 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1334 transitions. [2022-01-31 21:12:44,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:44,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:44,947 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:44,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 21:12:44,947 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:44,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash 283323894, now seen corresponding path program 114 times [2022-01-31 21:12:44,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:44,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314910876] [2022-01-31 21:12:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:45,117 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:45,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:45,272 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:45,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:45,321 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:45,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:45,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:45,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:48,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:48,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314910876] [2022-01-31 21:12:48,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [314910876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:48,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:48,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:12:48,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690649970] [2022-01-31 21:12:48,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:48,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:12:48,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:48,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:12:48,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5115, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:12:48,896 INFO L87 Difference]: Start difference. First operand 1070 states and 1334 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:12:54,427 INFO L93 Difference]: Finished difference Result 1102 states and 1367 transitions. [2022-01-31 21:12:54,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:12:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:12:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:12:54,429 INFO L225 Difference]: With dead ends: 1102 [2022-01-31 21:12:54,429 INFO L226 Difference]: Without dead ends: 1093 [2022-01-31 21:12:54,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3296 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=703, Invalid=18479, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:12:54,430 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 6566 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 6615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 6566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:12:54,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 330 Invalid, 6615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 6566 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:12:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1093 states. [2022-01-31 21:12:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1093 to 1063. [2022-01-31 21:12:54,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1058 states have (on average 1.2410207939508506) internal successors, (1313), 1058 states have internal predecessors, (1313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:54,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1317 transitions. [2022-01-31 21:12:54,939 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1317 transitions. Word has length 77 [2022-01-31 21:12:54,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:12:54,940 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1317 transitions. [2022-01-31 21:12:54,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:12:54,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1317 transitions. [2022-01-31 21:12:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-01-31 21:12:54,940 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:12:54,940 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:12:54,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 21:12:54,940 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:12:54,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:12:54,941 INFO L85 PathProgramCache]: Analyzing trace with hash 211601986, now seen corresponding path program 115 times [2022-01-31 21:12:54,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:12:54,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607669090] [2022-01-31 21:12:54,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:12:54,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:55,080 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:55,121 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:12:55,122 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:12:55,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:12:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:55,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:12:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:12:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:12:58,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:12:58,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607669090] [2022-01-31 21:12:58,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1607669090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:12:58,846 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:12:58,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 21:12:58,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587780910] [2022-01-31 21:12:58,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:12:58,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 21:12:58,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:12:58,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 21:12:58,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=5121, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 21:12:58,848 INFO L87 Difference]: Start difference. First operand 1063 states and 1317 transitions. Second operand has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:05,181 INFO L93 Difference]: Finished difference Result 1101 states and 1356 transitions. [2022-01-31 21:13:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 21:13:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-01-31 21:13:05,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:05,183 INFO L225 Difference]: With dead ends: 1101 [2022-01-31 21:13:05,183 INFO L226 Difference]: Without dead ends: 1092 [2022-01-31 21:13:05,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2903 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=685, Invalid=18497, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 21:13:05,184 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 7277 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 7326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:05,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 345 Invalid, 7326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7277 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 21:13:05,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-01-31 21:13:05,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 1063. [2022-01-31 21:13:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1058 states have (on average 1.231568998109641) internal successors, (1303), 1058 states have internal predecessors, (1303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1307 transitions. [2022-01-31 21:13:05,682 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1307 transitions. Word has length 77 [2022-01-31 21:13:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:05,682 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 1307 transitions. [2022-01-31 21:13:05,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.042857142857143) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1307 transitions. [2022-01-31 21:13:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 21:13:05,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:05,683 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:05,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 21:13:05,683 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:05,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:05,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1824302437, now seen corresponding path program 116 times [2022-01-31 21:13:05,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:05,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [956029543] [2022-01-31 21:13:05,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:05,733 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:05,805 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:05,806 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:13:05,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:05,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:05,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:05,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:05,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:09,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:09,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [956029543] [2022-01-31 21:13:09,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [956029543] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:09,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:09,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 21:13:09,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489726023] [2022-01-31 21:13:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 21:13:09,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 21:13:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=5478, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:13:09,998 INFO L87 Difference]: Start difference. First operand 1063 states and 1307 transitions. Second operand has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:18,375 INFO L93 Difference]: Finished difference Result 1182 states and 1461 transitions. [2022-01-31 21:13:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 21:13:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-01-31 21:13:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:18,377 INFO L225 Difference]: With dead ends: 1182 [2022-01-31 21:13:18,377 INFO L226 Difference]: Without dead ends: 1177 [2022-01-31 21:13:18,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3355 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=601, Invalid=21155, Unknown=0, NotChecked=0, Total=21756 [2022-01-31 21:13:18,378 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 74 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 9692 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 9738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 9692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:18,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 360 Invalid, 9738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 9692 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 21:13:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-01-31 21:13:18,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1130. [2022-01-31 21:13:18,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1125 states have (on average 1.247111111111111) internal successors, (1403), 1125 states have internal predecessors, (1403), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1407 transitions. [2022-01-31 21:13:18,936 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1407 transitions. Word has length 78 [2022-01-31 21:13:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:18,936 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1407 transitions. [2022-01-31 21:13:18,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 72 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1407 transitions. [2022-01-31 21:13:18,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:13:18,937 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:18,937 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:18,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 21:13:18,937 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:18,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1876962388, now seen corresponding path program 117 times [2022-01-31 21:13:18,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:18,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168705378] [2022-01-31 21:13:18,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:19,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:19,165 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:19,230 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:19,275 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:19,276 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:13:19,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:19,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:19,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:22,458 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:22,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168705378] [2022-01-31 21:13:22,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1168705378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:22,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:22,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:13:22,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902485678] [2022-01-31 21:13:22,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:22,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:13:22,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:22,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:13:22,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5413, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:13:22,460 INFO L87 Difference]: Start difference. First operand 1130 states and 1407 transitions. Second operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:26,549 INFO L93 Difference]: Finished difference Result 1141 states and 1420 transitions. [2022-01-31 21:13:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:13:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:13:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:26,550 INFO L225 Difference]: With dead ends: 1141 [2022-01-31 21:13:26,550 INFO L226 Difference]: Without dead ends: 1132 [2022-01-31 21:13:26,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2962 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=701, Invalid=19605, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:13:26,551 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 5445 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 5477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 5445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:26,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 355 Invalid, 5477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 5445 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:13:26,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2022-01-31 21:13:27,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 1132. [2022-01-31 21:13:27,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1132 states, 1127 states have (on average 1.2466725820763087) internal successors, (1405), 1127 states have internal predecessors, (1405), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:27,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1409 transitions. [2022-01-31 21:13:27,099 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1409 transitions. Word has length 79 [2022-01-31 21:13:27,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:27,099 INFO L470 AbstractCegarLoop]: Abstraction has 1132 states and 1409 transitions. [2022-01-31 21:13:27,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:27,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1409 transitions. [2022-01-31 21:13:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:13:27,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:27,100 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:27,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 21:13:27,100 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:27,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:27,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1015552400, now seen corresponding path program 118 times [2022-01-31 21:13:27,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:27,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063780187] [2022-01-31 21:13:27,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:27,183 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:27,224 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:27,287 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:27,333 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:27,333 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:13:27,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:27,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:27,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:30,842 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063780187] [2022-01-31 21:13:30,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063780187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:30,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:30,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:13:30,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910300589] [2022-01-31 21:13:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:30,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:13:30,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:13:30,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=5417, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:13:30,843 INFO L87 Difference]: Start difference. First operand 1132 states and 1409 transitions. Second operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:35,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:35,375 INFO L93 Difference]: Finished difference Result 1144 states and 1422 transitions. [2022-01-31 21:13:35,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:13:35,375 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:13:35,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:35,376 INFO L225 Difference]: With dead ends: 1144 [2022-01-31 21:13:35,377 INFO L226 Difference]: Without dead ends: 1135 [2022-01-31 21:13:35,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5261 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=719, Invalid=19587, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:13:35,378 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 28 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4706 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:35,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 295 Invalid, 4741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4706 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:13:35,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1135 states. [2022-01-31 21:13:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1135 to 1105. [2022-01-31 21:13:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1100 states have (on average 1.250909090909091) internal successors, (1376), 1100 states have internal predecessors, (1376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1380 transitions. [2022-01-31 21:13:35,929 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1380 transitions. Word has length 79 [2022-01-31 21:13:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:35,929 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1380 transitions. [2022-01-31 21:13:35,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:35,930 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1380 transitions. [2022-01-31 21:13:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:13:35,930 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:35,930 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:35,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 21:13:35,930 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash 545118772, now seen corresponding path program 119 times [2022-01-31 21:13:35,931 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:35,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943825985] [2022-01-31 21:13:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:36,085 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:36,168 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:36,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:36,289 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:36,289 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:13:36,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:36,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:36,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:39,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:39,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943825985] [2022-01-31 21:13:39,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [943825985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:39,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:39,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:13:39,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458178423] [2022-01-31 21:13:39,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:39,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:13:39,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:13:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=5387, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:13:39,970 INFO L87 Difference]: Start difference. First operand 1105 states and 1380 transitions. Second operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:44,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:44,599 INFO L93 Difference]: Finished difference Result 1120 states and 1396 transitions. [2022-01-31 21:13:44,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:13:44,600 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:13:44,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:44,601 INFO L225 Difference]: With dead ends: 1120 [2022-01-31 21:13:44,601 INFO L226 Difference]: Without dead ends: 1111 [2022-01-31 21:13:44,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4896 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=777, Invalid=19529, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:13:44,602 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 5156 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 5191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:44,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 315 Invalid, 5191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5156 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:13:44,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-31 21:13:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1105. [2022-01-31 21:13:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 1100 states have (on average 1.25) internal successors, (1375), 1100 states have internal predecessors, (1375), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:45,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1379 transitions. [2022-01-31 21:13:45,137 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1379 transitions. Word has length 79 [2022-01-31 21:13:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:45,137 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1379 transitions. [2022-01-31 21:13:45,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1379 transitions. [2022-01-31 21:13:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:13:45,138 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:45,138 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:45,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 21:13:45,138 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:45,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1261825784, now seen corresponding path program 120 times [2022-01-31 21:13:45,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:45,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637519327] [2022-01-31 21:13:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:45,239 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:45,290 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:45,368 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:45,411 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:45,411 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:13:45,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:45,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:47,869 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:47,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637519327] [2022-01-31 21:13:47,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [637519327] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:47,869 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:47,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:13:47,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495535479] [2022-01-31 21:13:47,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:47,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:13:47,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:13:47,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=5437, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:13:47,871 INFO L87 Difference]: Start difference. First operand 1105 states and 1379 transitions. Second operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:51,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:13:51,519 INFO L93 Difference]: Finished difference Result 1118 states and 1394 transitions. [2022-01-31 21:13:51,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:13:51,520 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:13:51,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:13:51,521 INFO L225 Difference]: With dead ends: 1118 [2022-01-31 21:13:51,521 INFO L226 Difference]: Without dead ends: 1109 [2022-01-31 21:13:51,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4852 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=653, Invalid=19653, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:13:51,522 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 5939 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 5974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:13:51,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 360 Invalid, 5974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5939 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 21:13:51,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-01-31 21:13:52,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1107. [2022-01-31 21:13:52,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1107 states, 1102 states have (on average 1.249546279491833) internal successors, (1377), 1102 states have internal predecessors, (1377), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:52,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1107 states to 1107 states and 1381 transitions. [2022-01-31 21:13:52,073 INFO L78 Accepts]: Start accepts. Automaton has 1107 states and 1381 transitions. Word has length 79 [2022-01-31 21:13:52,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:13:52,073 INFO L470 AbstractCegarLoop]: Abstraction has 1107 states and 1381 transitions. [2022-01-31 21:13:52,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:13:52,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1107 states and 1381 transitions. [2022-01-31 21:13:52,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:13:52,074 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:13:52,074 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:13:52,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 21:13:52,074 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:13:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:13:52,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1682676548, now seen corresponding path program 121 times [2022-01-31 21:13:52,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:13:52,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200403769] [2022-01-31 21:13:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:13:52,184 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:52,246 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:52,338 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:52,409 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:13:52,410 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:13:52,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:13:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:52,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:13:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:13:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:13:59,483 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:13:59,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200403769] [2022-01-31 21:13:59,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1200403769] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:13:59,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:13:59,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:13:59,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525019410] [2022-01-31 21:13:59,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:13:59,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:13:59,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:13:59,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:13:59,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5476, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:13:59,484 INFO L87 Difference]: Start difference. First operand 1107 states and 1381 transitions. Second operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:14:00,274 INFO L93 Difference]: Finished difference Result 1139 states and 1415 transitions. [2022-01-31 21:14:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:14:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:14:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:14:00,276 INFO L225 Difference]: With dead ends: 1139 [2022-01-31 21:14:00,276 INFO L226 Difference]: Without dead ends: 1130 [2022-01-31 21:14:00,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=250, Invalid=6070, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:14:00,276 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 611 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:14:00,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 365 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 611 Unchecked, 0.0s Time] [2022-01-31 21:14:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-01-31 21:14:00,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 1130. [2022-01-31 21:14:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1125 states have (on average 1.2444444444444445) internal successors, (1400), 1125 states have internal predecessors, (1400), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1404 transitions. [2022-01-31 21:14:00,854 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1404 transitions. Word has length 79 [2022-01-31 21:14:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:14:00,854 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1404 transitions. [2022-01-31 21:14:00,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1404 transitions. [2022-01-31 21:14:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 21:14:00,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:14:00,855 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:14:00,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 21:14:00,855 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:14:00,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:14:00,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1079694692, now seen corresponding path program 122 times [2022-01-31 21:14:00,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:14:00,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695021451] [2022-01-31 21:14:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:14:00,920 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:00,995 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:01,026 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:01,026 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:14:01,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:14:01,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:01,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:14:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:14:05,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:14:05,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695021451] [2022-01-31 21:14:05,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1695021451] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:14:05,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:14:05,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:14:05,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236402127] [2022-01-31 21:14:05,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:14:05,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:14:05,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:14:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:14:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=5411, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:14:05,468 INFO L87 Difference]: Start difference. First operand 1130 states and 1404 transitions. Second operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:12,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:14:12,274 INFO L93 Difference]: Finished difference Result 1171 states and 1447 transitions. [2022-01-31 21:14:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:14:12,275 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 21:14:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:14:12,276 INFO L225 Difference]: With dead ends: 1171 [2022-01-31 21:14:12,276 INFO L226 Difference]: Without dead ends: 1162 [2022-01-31 21:14:12,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=685, Invalid=19055, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 21:14:12,277 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 7634 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 7796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 7634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:14:12,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 360 Invalid, 7796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 7634 Invalid, 0 Unknown, 112 Unchecked, 2.6s Time] [2022-01-31 21:14:12,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-01-31 21:14:12,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1130. [2022-01-31 21:14:12,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1125 states have (on average 1.2355555555555555) internal successors, (1390), 1125 states have internal predecessors, (1390), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1394 transitions. [2022-01-31 21:14:12,832 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1394 transitions. Word has length 79 [2022-01-31 21:14:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:14:12,832 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 1394 transitions. [2022-01-31 21:14:12,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 71 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:12,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1394 transitions. [2022-01-31 21:14:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 21:14:12,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:14:12,833 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:14:12,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 21:14:12,833 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:14:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:14:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -683232327, now seen corresponding path program 123 times [2022-01-31 21:14:12,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:14:12,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932514883] [2022-01-31 21:14:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:14:12,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:12,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:12,956 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:14:12,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:14:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:13,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:14:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:14:16,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:14:16,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932514883] [2022-01-31 21:14:16,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [932514883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:14:16,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:14:16,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 21:14:16,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406990243] [2022-01-31 21:14:16,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:14:16,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 21:14:16,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:14:16,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 21:14:16,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:14:16,794 INFO L87 Difference]: Start difference. First operand 1130 states and 1394 transitions. Second operand has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:14:24,376 INFO L93 Difference]: Finished difference Result 1253 states and 1553 transitions. [2022-01-31 21:14:24,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 21:14:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-01-31 21:14:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:14:24,378 INFO L225 Difference]: With dead ends: 1253 [2022-01-31 21:14:24,378 INFO L226 Difference]: Without dead ends: 1248 [2022-01-31 21:14:24,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3524 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=617, Invalid=22335, Unknown=0, NotChecked=0, Total=22952 [2022-01-31 21:14:24,379 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 10257 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 10303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 10257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:14:24,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 370 Invalid, 10303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 10257 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 21:14:24,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1248 states. [2022-01-31 21:14:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1248 to 1199. [2022-01-31 21:14:24,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1194 states have (on average 1.2504187604690118) internal successors, (1493), 1194 states have internal predecessors, (1493), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:24,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 1497 transitions. [2022-01-31 21:14:24,982 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 1497 transitions. Word has length 80 [2022-01-31 21:14:24,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:14:24,982 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 1497 transitions. [2022-01-31 21:14:24,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 74 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:24,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 1497 transitions. [2022-01-31 21:14:24,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:14:24,983 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:14:24,983 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:14:24,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 21:14:24,983 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:14:24,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:14:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1059068870, now seen corresponding path program 124 times [2022-01-31 21:14:24,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:14:24,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289094955] [2022-01-31 21:14:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:14:25,092 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:25,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:25,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:25,256 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:25,256 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:14:25,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:14:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:25,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:14:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:14:27,912 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:14:27,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289094955] [2022-01-31 21:14:27,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1289094955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:14:27,912 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:14:27,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 21:14:27,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10637770] [2022-01-31 21:14:27,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:14:27,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 21:14:27,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:14:27,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 21:14:27,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=5445, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 21:14:27,914 INFO L87 Difference]: Start difference. First operand 1199 states and 1497 transitions. Second operand has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:32,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:14:32,534 INFO L93 Difference]: Finished difference Result 1211 states and 1511 transitions. [2022-01-31 21:14:32,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 21:14:32,534 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:14:32,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:14:32,535 INFO L225 Difference]: With dead ends: 1211 [2022-01-31 21:14:32,535 INFO L226 Difference]: Without dead ends: 1202 [2022-01-31 21:14:32,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4980 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=637, Invalid=19669, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 21:14:32,536 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 5452 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 5483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 5452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:14:32,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 360 Invalid, 5483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 5452 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:14:32,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2022-01-31 21:14:33,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 1201. [2022-01-31 21:14:33,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1196 states have (on average 1.25) internal successors, (1495), 1196 states have internal predecessors, (1495), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 1499 transitions. [2022-01-31 21:14:33,151 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 1499 transitions. Word has length 81 [2022-01-31 21:14:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:14:33,151 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 1499 transitions. [2022-01-31 21:14:33,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.0694444444444444) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 1499 transitions. [2022-01-31 21:14:33,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:14:33,151 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:14:33,152 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:14:33,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 21:14:33,152 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:14:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:14:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 250162314, now seen corresponding path program 125 times [2022-01-31 21:14:33,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:14:33,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111064459] [2022-01-31 21:14:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:14:33,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:33,321 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:33,397 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:33,438 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:33,438 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:14:33,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:14:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:33,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:14:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:33,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:14:37,156 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:14:37,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111064459] [2022-01-31 21:14:37,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111064459] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:14:37,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:14:37,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:14:37,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475466776] [2022-01-31 21:14:37,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:14:37,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:14:37,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:14:37,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:14:37,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=5679, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:14:37,157 INFO L87 Difference]: Start difference. First operand 1201 states and 1499 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:41,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:14:41,218 INFO L93 Difference]: Finished difference Result 1210 states and 1509 transitions. [2022-01-31 21:14:41,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:14:41,218 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:14:41,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:14:41,220 INFO L225 Difference]: With dead ends: 1210 [2022-01-31 21:14:41,220 INFO L226 Difference]: Without dead ends: 1201 [2022-01-31 21:14:41,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5666 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=815, Invalid=20647, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:14:41,221 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 4513 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 4551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 21:14:41,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 290 Invalid, 4551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4513 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 21:14:41,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1201 states. [2022-01-31 21:14:41,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1201 to 1170. [2022-01-31 21:14:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1165 states have (on average 1.251502145922747) internal successors, (1458), 1165 states have internal predecessors, (1458), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1462 transitions. [2022-01-31 21:14:41,837 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1462 transitions. Word has length 81 [2022-01-31 21:14:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:14:41,837 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1462 transitions. [2022-01-31 21:14:41,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:41,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1462 transitions. [2022-01-31 21:14:41,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:14:41,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:14:41,838 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:14:41,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 21:14:41,839 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:14:41,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:14:41,839 INFO L85 PathProgramCache]: Analyzing trace with hash -863527346, now seen corresponding path program 126 times [2022-01-31 21:14:41,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:14:41,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411484680] [2022-01-31 21:14:41,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:14:41,940 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:42,000 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:42,082 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:42,124 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:42,124 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:14:42,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:14:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:42,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:14:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:14:45,853 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:14:45,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1411484680] [2022-01-31 21:14:45,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1411484680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:14:45,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:14:45,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:14:45,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462313675] [2022-01-31 21:14:45,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:14:45,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:14:45,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:14:45,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:14:45,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=5713, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:14:45,857 INFO L87 Difference]: Start difference. First operand 1170 states and 1462 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:50,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:14:50,056 INFO L93 Difference]: Finished difference Result 1182 states and 1475 transitions. [2022-01-31 21:14:50,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:14:50,057 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:14:50,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:14:50,058 INFO L225 Difference]: With dead ends: 1182 [2022-01-31 21:14:50,058 INFO L226 Difference]: Without dead ends: 1173 [2022-01-31 21:14:50,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5663 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=745, Invalid=20717, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:14:50,061 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 4626 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 4660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 4626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 21:14:50,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 290 Invalid, 4660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 4626 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 21:14:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2022-01-31 21:14:50,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 1170. [2022-01-31 21:14:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1165 states have (on average 1.2506437768240344) internal successors, (1457), 1165 states have internal predecessors, (1457), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1461 transitions. [2022-01-31 21:14:50,665 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1461 transitions. Word has length 81 [2022-01-31 21:14:50,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:14:50,665 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1461 transitions. [2022-01-31 21:14:50,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:50,665 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1461 transitions. [2022-01-31 21:14:50,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:14:50,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:14:50,666 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:14:50,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 21:14:50,666 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:14:50,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:14:50,666 INFO L85 PathProgramCache]: Analyzing trace with hash -2117358, now seen corresponding path program 127 times [2022-01-31 21:14:50,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:14:50,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914772457] [2022-01-31 21:14:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:14:50,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:50,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:50,922 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:50,988 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:14:50,989 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:14:50,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:14:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:51,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:14:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:14:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:14:54,834 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:14:54,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914772457] [2022-01-31 21:14:54,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1914772457] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:14:54,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:14:54,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:14:54,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773589037] [2022-01-31 21:14:54,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:14:54,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:14:54,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:14:54,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:14:54,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=5717, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:14:54,836 INFO L87 Difference]: Start difference. First operand 1170 states and 1461 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:14:59,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:14:59,514 INFO L93 Difference]: Finished difference Result 1185 states and 1477 transitions. [2022-01-31 21:14:59,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:14:59,515 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:14:59,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:14:59,516 INFO L225 Difference]: With dead ends: 1185 [2022-01-31 21:14:59,516 INFO L226 Difference]: Without dead ends: 1176 [2022-01-31 21:14:59,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5484 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=735, Invalid=20727, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:14:59,517 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 4936 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 4971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:14:59,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 295 Invalid, 4971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4936 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:14:59,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-01-31 21:15:00,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1170. [2022-01-31 21:15:00,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1165 states have (on average 1.2497854077253219) internal successors, (1456), 1165 states have internal predecessors, (1456), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1460 transitions. [2022-01-31 21:15:00,127 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1460 transitions. Word has length 81 [2022-01-31 21:15:00,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:15:00,127 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1460 transitions. [2022-01-31 21:15:00,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:00,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1460 transitions. [2022-01-31 21:15:00,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:15:00,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:15:00,128 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:15:00,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 21:15:00,128 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:15:00,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:15:00,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1558553814, now seen corresponding path program 128 times [2022-01-31 21:15:00,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:15:00,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560191923] [2022-01-31 21:15:00,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:15:00,252 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:00,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:00,385 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:00,429 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:00,430 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:15:00,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:15:00,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:00,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:15:00,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:00,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:15:03,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:15:03,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560191923] [2022-01-31 21:15:03,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [560191923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:15:03,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:15:03,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:15:03,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838394070] [2022-01-31 21:15:03,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:15:03,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:15:03,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:15:03,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:15:03,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5776, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:15:03,395 INFO L87 Difference]: Start difference. First operand 1170 states and 1460 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:08,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:15:08,117 INFO L93 Difference]: Finished difference Result 1184 states and 1476 transitions. [2022-01-31 21:15:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:15:08,118 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:15:08,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:15:08,119 INFO L225 Difference]: With dead ends: 1184 [2022-01-31 21:15:08,119 INFO L226 Difference]: Without dead ends: 1175 [2022-01-31 21:15:08,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3310 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=591, Invalid=20871, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:15:08,121 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 6339 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 6374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 6339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:15:08,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 375 Invalid, 6374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 6339 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 21:15:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1175 states. [2022-01-31 21:15:08,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1175 to 1172. [2022-01-31 21:15:08,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1172 states, 1167 states have (on average 1.249357326478149) internal successors, (1458), 1167 states have internal predecessors, (1458), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1462 transitions. [2022-01-31 21:15:08,753 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1462 transitions. Word has length 81 [2022-01-31 21:15:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:15:08,753 INFO L470 AbstractCegarLoop]: Abstraction has 1172 states and 1462 transitions. [2022-01-31 21:15:08,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:08,754 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1462 transitions. [2022-01-31 21:15:08,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:15:08,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:15:08,754 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:15:08,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 21:15:08,754 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:15:08,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:15:08,755 INFO L85 PathProgramCache]: Analyzing trace with hash -2019706470, now seen corresponding path program 129 times [2022-01-31 21:15:08,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:15:08,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88215887] [2022-01-31 21:15:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:15:08,866 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:08,929 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:09,012 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:09,062 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:09,063 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:15:09,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:15:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:09,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:15:09,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:15:12,470 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:15:12,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88215887] [2022-01-31 21:15:12,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [88215887] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:15:12,470 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:15:12,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:15:12,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277571377] [2022-01-31 21:15:12,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:15:12,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:15:12,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:15:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:15:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5776, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:15:12,471 INFO L87 Difference]: Start difference. First operand 1172 states and 1462 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:17,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:15:17,927 INFO L93 Difference]: Finished difference Result 1186 states and 1478 transitions. [2022-01-31 21:15:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:15:17,927 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:15:17,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:15:17,928 INFO L225 Difference]: With dead ends: 1186 [2022-01-31 21:15:17,929 INFO L226 Difference]: Without dead ends: 1177 [2022-01-31 21:15:17,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3308 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=591, Invalid=20871, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:15:17,929 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 6397 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 6433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 6397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:15:17,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 370 Invalid, 6433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 6397 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:15:17,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-01-31 21:15:18,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1174. [2022-01-31 21:15:18,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1169 states have (on average 1.2489307100085543) internal successors, (1460), 1169 states have internal predecessors, (1460), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:18,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1464 transitions. [2022-01-31 21:15:18,540 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1464 transitions. Word has length 81 [2022-01-31 21:15:18,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:15:18,540 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1464 transitions. [2022-01-31 21:15:18,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:18,540 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1464 transitions. [2022-01-31 21:15:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:15:18,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:15:18,541 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:15:18,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 21:15:18,542 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:15:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:15:18,542 INFO L85 PathProgramCache]: Analyzing trace with hash -669241506, now seen corresponding path program 130 times [2022-01-31 21:15:18,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:15:18,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67458583] [2022-01-31 21:15:18,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:15:18,649 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:18,716 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:18,809 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:18,879 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:18,879 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:15:18,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:15:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:18,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:15:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:15:22,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:15:22,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67458583] [2022-01-31 21:15:22,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [67458583] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:15:22,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:15:22,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:15:22,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796154955] [2022-01-31 21:15:22,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:15:22,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:15:22,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:15:22,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:15:22,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=5775, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:15:22,193 INFO L87 Difference]: Start difference. First operand 1174 states and 1464 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:27,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:15:27,232 INFO L93 Difference]: Finished difference Result 1209 states and 1501 transitions. [2022-01-31 21:15:27,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:15:27,232 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:15:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:15:27,233 INFO L225 Difference]: With dead ends: 1209 [2022-01-31 21:15:27,233 INFO L226 Difference]: Without dead ends: 1200 [2022-01-31 21:15:27,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3311 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=592, Invalid=20870, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:15:27,235 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 6629 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 6666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 6629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:15:27,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 375 Invalid, 6666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 6629 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:15:27,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2022-01-31 21:15:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 1197. [2022-01-31 21:15:27,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1192 states have (on average 1.2441275167785235) internal successors, (1483), 1192 states have internal predecessors, (1483), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:27,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1487 transitions. [2022-01-31 21:15:27,855 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1487 transitions. Word has length 81 [2022-01-31 21:15:27,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:15:27,855 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1487 transitions. [2022-01-31 21:15:27,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1487 transitions. [2022-01-31 21:15:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-01-31 21:15:27,856 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:15:27,856 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:15:27,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 21:15:27,856 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:15:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:15:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash 2093129734, now seen corresponding path program 131 times [2022-01-31 21:15:27,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:15:27,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [507014303] [2022-01-31 21:15:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:15:27,904 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:27,955 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:27,985 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:27,985 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:15:27,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:15:27,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:28,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:15:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:28,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:15:32,404 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:15:32,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [507014303] [2022-01-31 21:15:32,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [507014303] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:15:32,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:15:32,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 21:15:32,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655538289] [2022-01-31 21:15:32,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:15:32,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 21:15:32,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:15:32,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 21:15:32,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=5709, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 21:15:32,406 INFO L87 Difference]: Start difference. First operand 1197 states and 1487 transitions. Second operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:15:40,030 INFO L93 Difference]: Finished difference Result 1239 states and 1530 transitions. [2022-01-31 21:15:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 21:15:40,030 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-01-31 21:15:40,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:15:40,032 INFO L225 Difference]: With dead ends: 1239 [2022-01-31 21:15:40,032 INFO L226 Difference]: Without dead ends: 1230 [2022-01-31 21:15:40,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3221 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=725, Invalid=20737, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 21:15:40,033 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 50 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 8395 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 8444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 8395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:15:40,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 370 Invalid, 8444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 8395 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 21:15:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2022-01-31 21:15:40,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1197. [2022-01-31 21:15:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1192 states have (on average 1.235738255033557) internal successors, (1473), 1192 states have internal predecessors, (1473), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 1477 transitions. [2022-01-31 21:15:40,700 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 1477 transitions. Word has length 81 [2022-01-31 21:15:40,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:15:40,700 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 1477 transitions. [2022-01-31 21:15:40,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 73 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:40,700 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 1477 transitions. [2022-01-31 21:15:40,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 21:15:40,701 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:15:40,701 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:15:40,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 21:15:40,701 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:15:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:15:40,701 INFO L85 PathProgramCache]: Analyzing trace with hash 668482903, now seen corresponding path program 132 times [2022-01-31 21:15:40,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:15:40,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891578621] [2022-01-31 21:15:40,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:15:40,757 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:40,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:40,838 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:15:40,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:15:40,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:40,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:15:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:40,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:15:45,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:15:45,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891578621] [2022-01-31 21:15:45,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1891578621] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:15:45,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:15:45,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 21:15:45,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856197929] [2022-01-31 21:15:45,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:15:45,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 21:15:45,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:15:45,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 21:15:45,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=6086, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:15:45,028 INFO L87 Difference]: Start difference. First operand 1197 states and 1477 transitions. Second operand has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:53,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:15:53,398 INFO L93 Difference]: Finished difference Result 1324 states and 1641 transitions. [2022-01-31 21:15:53,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 21:15:53,398 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-01-31 21:15:53,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:15:53,400 INFO L225 Difference]: With dead ends: 1324 [2022-01-31 21:15:53,400 INFO L226 Difference]: Without dead ends: 1319 [2022-01-31 21:15:53,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3697 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=633, Invalid=23547, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 21:15:53,401 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 76 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 10838 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 10884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 10838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 21:15:53,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 380 Invalid, 10884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 10838 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 21:15:53,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-01-31 21:15:54,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1268. [2022-01-31 21:15:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1263 states have (on average 1.250197941409343) internal successors, (1579), 1263 states have internal predecessors, (1579), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:54,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1583 transitions. [2022-01-31 21:15:54,088 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1583 transitions. Word has length 82 [2022-01-31 21:15:54,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:15:54,088 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 1583 transitions. [2022-01-31 21:15:54,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:15:54,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1583 transitions. [2022-01-31 21:15:54,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:15:54,088 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:15:54,089 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:15:54,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 21:15:54,089 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:15:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:15:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -796338516, now seen corresponding path program 133 times [2022-01-31 21:15:54,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:15:54,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864308068] [2022-01-31 21:15:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:15:54,195 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:54,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:54,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:54,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:15:54,405 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:15:54,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:15:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:54,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:15:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:15:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:15:58,669 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:15:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864308068] [2022-01-31 21:15:58,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864308068] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:15:58,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:15:58,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:15:58,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431986041] [2022-01-31 21:15:58,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:15:58,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:15:58,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:15:58,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:15:58,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=6017, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:15:58,671 INFO L87 Difference]: Start difference. First operand 1268 states and 1583 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:03,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:16:03,444 INFO L93 Difference]: Finished difference Result 1279 states and 1595 transitions. [2022-01-31 21:16:03,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:16:03,445 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:16:03,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:16:03,446 INFO L225 Difference]: With dead ends: 1279 [2022-01-31 21:16:03,446 INFO L226 Difference]: Without dead ends: 1270 [2022-01-31 21:16:03,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6081 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=771, Invalid=21879, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:16:03,447 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 5075 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 5109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 5075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:16:03,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 310 Invalid, 5109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 5075 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:16:03,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-01-31 21:16:04,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1268. [2022-01-31 21:16:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1263 states have (on average 1.2494061757719714) internal successors, (1578), 1263 states have internal predecessors, (1578), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1582 transitions. [2022-01-31 21:16:04,140 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1582 transitions. Word has length 83 [2022-01-31 21:16:04,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:16:04,140 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 1582 transitions. [2022-01-31 21:16:04,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:04,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1582 transitions. [2022-01-31 21:16:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:16:04,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:16:04,141 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:16:04,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 21:16:04,141 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:16:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:16:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1910028176, now seen corresponding path program 134 times [2022-01-31 21:16:04,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:16:04,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436759927] [2022-01-31 21:16:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:16:04,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:04,300 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:04,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:04,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:04,445 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:16:04,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:16:04,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:04,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:16:04,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:16:08,793 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:16:08,793 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436759927] [2022-01-31 21:16:08,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1436759927] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:16:08,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:16:08,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:16:08,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971807611] [2022-01-31 21:16:08,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:16:08,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:16:08,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:16:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:16:08,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=6021, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:16:08,795 INFO L87 Difference]: Start difference. First operand 1268 states and 1582 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:16:13,953 INFO L93 Difference]: Finished difference Result 1282 states and 1597 transitions. [2022-01-31 21:16:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:16:13,953 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:16:13,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:16:13,956 INFO L225 Difference]: With dead ends: 1282 [2022-01-31 21:16:13,956 INFO L226 Difference]: Without dead ends: 1273 [2022-01-31 21:16:13,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5894 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=761, Invalid=21889, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:16:13,958 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 4852 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 4887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 4852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 21:16:13,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 290 Invalid, 4887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 4852 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 21:16:13,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-31 21:16:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1268. [2022-01-31 21:16:14,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1268 states, 1263 states have (on average 1.2486144101346002) internal successors, (1577), 1263 states have internal predecessors, (1577), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1268 states to 1268 states and 1581 transitions. [2022-01-31 21:16:14,674 INFO L78 Accepts]: Start accepts. Automaton has 1268 states and 1581 transitions. Word has length 83 [2022-01-31 21:16:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:16:14,674 INFO L470 AbstractCegarLoop]: Abstraction has 1268 states and 1581 transitions. [2022-01-31 21:16:14,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1268 states and 1581 transitions. [2022-01-31 21:16:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:16:14,675 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:16:14,675 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:16:14,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 21:16:14,675 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:16:14,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:16:14,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1048618188, now seen corresponding path program 135 times [2022-01-31 21:16:14,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:16:14,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653064434] [2022-01-31 21:16:14,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:16:14,855 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:14,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:15,041 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:15,115 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:15,115 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:16:15,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:16:15,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:15,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:16:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:16:18,385 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:16:18,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653064434] [2022-01-31 21:16:18,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653064434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:16:18,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:16:18,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:16:18,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177435336] [2022-01-31 21:16:18,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:16:18,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:16:18,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:16:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:16:18,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=6045, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:16:18,387 INFO L87 Difference]: Start difference. First operand 1268 states and 1581 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:23,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:16:23,612 INFO L93 Difference]: Finished difference Result 1282 states and 1597 transitions. [2022-01-31 21:16:23,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:16:23,613 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:16:23,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:16:23,614 INFO L225 Difference]: With dead ends: 1282 [2022-01-31 21:16:23,614 INFO L226 Difference]: Without dead ends: 1273 [2022-01-31 21:16:23,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5490 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=685, Invalid=21965, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:16:23,615 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 6575 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 6610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 6575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:16:23,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 380 Invalid, 6610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 6575 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:16:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-01-31 21:16:24,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 1270. [2022-01-31 21:16:24,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1270 states, 1265 states have (on average 1.2482213438735177) internal successors, (1579), 1265 states have internal predecessors, (1579), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:24,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1583 transitions. [2022-01-31 21:16:24,291 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1583 transitions. Word has length 83 [2022-01-31 21:16:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:16:24,291 INFO L470 AbstractCegarLoop]: Abstraction has 1270 states and 1583 transitions. [2022-01-31 21:16:24,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1583 transitions. [2022-01-31 21:16:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:16:24,292 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:16:24,292 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:16:24,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 21:16:24,292 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:16:24,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:16:24,292 INFO L85 PathProgramCache]: Analyzing trace with hash 512052984, now seen corresponding path program 136 times [2022-01-31 21:16:24,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:16:24,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319033786] [2022-01-31 21:16:24,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:16:24,425 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:24,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:24,540 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:24,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:24,600 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:16:24,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:16:24,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:24,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:16:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:16:33,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:16:33,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319033786] [2022-01-31 21:16:33,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319033786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:16:33,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:16:33,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:16:33,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258328797] [2022-01-31 21:16:33,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:16:33,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:16:33,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:16:33,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:16:33,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6084, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:16:33,304 INFO L87 Difference]: Start difference. First operand 1270 states and 1583 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:34,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:16:34,267 INFO L93 Difference]: Finished difference Result 1281 states and 1596 transitions. [2022-01-31 21:16:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:16:34,267 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:16:34,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:16:34,268 INFO L225 Difference]: With dead ends: 1281 [2022-01-31 21:16:34,268 INFO L226 Difference]: Without dead ends: 1272 [2022-01-31 21:16:34,269 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=262, Invalid=6710, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 21:16:34,269 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:16:34,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 385 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 654 Unchecked, 0.0s Time] [2022-01-31 21:16:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2022-01-31 21:16:34,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 1272. [2022-01-31 21:16:34,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1272 states, 1267 states have (on average 1.2478295185477506) internal successors, (1581), 1267 states have internal predecessors, (1581), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1272 states to 1272 states and 1585 transitions. [2022-01-31 21:16:34,980 INFO L78 Accepts]: Start accepts. Automaton has 1272 states and 1585 transitions. Word has length 83 [2022-01-31 21:16:34,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:16:34,980 INFO L470 AbstractCegarLoop]: Abstraction has 1272 states and 1585 transitions. [2022-01-31 21:16:34,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 1272 states and 1585 transitions. [2022-01-31 21:16:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:16:34,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:16:34,981 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:16:34,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 21:16:34,981 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:16:34,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:16:34,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1228759996, now seen corresponding path program 137 times [2022-01-31 21:16:34,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:16:34,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112186761] [2022-01-31 21:16:34,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:16:35,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:35,214 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:35,315 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:35,370 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:35,370 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:16:35,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:16:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:35,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:16:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:35,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:16:39,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:16:39,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112186761] [2022-01-31 21:16:39,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [112186761] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:16:39,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:16:39,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:16:39,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714857618] [2022-01-31 21:16:39,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:16:39,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:16:39,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:16:39,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:16:39,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=5993, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:16:39,501 INFO L87 Difference]: Start difference. First operand 1272 states and 1585 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:45,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:16:45,363 INFO L93 Difference]: Finished difference Result 1293 states and 1607 transitions. [2022-01-31 21:16:45,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:16:45,364 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:16:45,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:16:45,365 INFO L225 Difference]: With dead ends: 1293 [2022-01-31 21:16:45,365 INFO L226 Difference]: Without dead ends: 1284 [2022-01-31 21:16:45,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5135 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=811, Invalid=21839, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:16:45,366 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 5795 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 5834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 5795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 21:16:45,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 310 Invalid, 5834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 5795 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 21:16:45,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2022-01-31 21:16:46,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1249. [2022-01-31 21:16:46,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1244 states have (on average 1.2508038585209003) internal successors, (1556), 1244 states have internal predecessors, (1556), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:46,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1560 transitions. [2022-01-31 21:16:46,085 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1560 transitions. Word has length 83 [2022-01-31 21:16:46,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:16:46,085 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1560 transitions. [2022-01-31 21:16:46,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:46,085 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1560 transitions. [2022-01-31 21:16:46,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:16:46,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:16:46,086 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:16:46,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 21:16:46,086 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:16:46,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:16:46,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1715742336, now seen corresponding path program 138 times [2022-01-31 21:16:46,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:16:46,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302520616] [2022-01-31 21:16:46,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:16:46,173 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:46,216 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:46,269 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:46,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:46,318 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:16:46,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:16:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:46,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:16:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:46,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:16:50,810 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:16:50,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302520616] [2022-01-31 21:16:50,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302520616] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:16:50,827 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:16:50,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:16:50,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921112860] [2022-01-31 21:16:50,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:16:50,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:16:50,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:16:50,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:16:50,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6036, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:16:50,829 INFO L87 Difference]: Start difference. First operand 1249 states and 1560 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:16:56,275 INFO L93 Difference]: Finished difference Result 1273 states and 1585 transitions. [2022-01-31 21:16:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:16:56,275 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:16:56,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:16:56,277 INFO L225 Difference]: With dead ends: 1273 [2022-01-31 21:16:56,277 INFO L226 Difference]: Without dead ends: 1264 [2022-01-31 21:16:56,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5191 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=722, Invalid=21928, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:16:56,278 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 6113 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 6152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 6113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 21:16:56,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 320 Invalid, 6152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 6113 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 21:16:56,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1264 states. [2022-01-31 21:16:56,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1264 to 1249. [2022-01-31 21:16:56,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1249 states, 1244 states have (on average 1.25) internal successors, (1555), 1244 states have internal predecessors, (1555), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:56,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1249 states to 1249 states and 1559 transitions. [2022-01-31 21:16:56,981 INFO L78 Accepts]: Start accepts. Automaton has 1249 states and 1559 transitions. Word has length 83 [2022-01-31 21:16:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:16:56,981 INFO L470 AbstractCegarLoop]: Abstraction has 1249 states and 1559 transitions. [2022-01-31 21:16:56,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:16:56,981 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states and 1559 transitions. [2022-01-31 21:16:56,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 21:16:56,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:16:56,982 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:16:56,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 21:16:56,982 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:16:56,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:16:56,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1046628904, now seen corresponding path program 139 times [2022-01-31 21:16:56,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:16:56,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185658417] [2022-01-31 21:16:56,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:16:57,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:57,113 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:57,157 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:16:57,157 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:16:57,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:16:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:57,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:16:57,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:16:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:16:59,934 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:16:59,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185658417] [2022-01-31 21:16:59,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185658417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:16:59,935 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:16:59,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:16:59,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030769034] [2022-01-31 21:16:59,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:16:59,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:16:59,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:16:59,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:16:59,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=5926, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 21:16:59,936 INFO L87 Difference]: Start difference. First operand 1249 states and 1559 transitions. Second operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:04,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:04,985 INFO L93 Difference]: Finished difference Result 1275 states and 1587 transitions. [2022-01-31 21:17:04,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:17:04,985 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 21:17:04,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:04,986 INFO L225 Difference]: With dead ends: 1275 [2022-01-31 21:17:04,986 INFO L226 Difference]: Without dead ends: 1266 [2022-01-31 21:17:04,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3382 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=605, Invalid=21745, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 21:17:04,987 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 8372 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 8411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 8372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:04,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 375 Invalid, 8411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 8372 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 21:17:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2022-01-31 21:17:05,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 1252. [2022-01-31 21:17:05,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1247 states have (on average 1.2493985565356855) internal successors, (1558), 1247 states have internal predecessors, (1558), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:05,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1562 transitions. [2022-01-31 21:17:05,741 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1562 transitions. Word has length 83 [2022-01-31 21:17:05,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:05,741 INFO L470 AbstractCegarLoop]: Abstraction has 1252 states and 1562 transitions. [2022-01-31 21:17:05,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 75 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:05,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1562 transitions. [2022-01-31 21:17:05,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 21:17:05,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:05,742 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:05,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 21:17:05,742 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:05,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:05,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1708271755, now seen corresponding path program 140 times [2022-01-31 21:17:05,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:05,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1083668228] [2022-01-31 21:17:05,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:05,782 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:05,851 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:05,852 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-01-31 21:17:05,852 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:05,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:05,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:05,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:10,246 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:10,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1083668228] [2022-01-31 21:17:10,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1083668228] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:10,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:10,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 21:17:10,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728067843] [2022-01-31 21:17:10,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:10,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 21:17:10,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:10,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 21:17:10,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=6402, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 21:17:10,247 INFO L87 Difference]: Start difference. First operand 1252 states and 1562 transitions. Second operand has 80 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:18,929 INFO L93 Difference]: Finished difference Result 1383 states and 1731 transitions. [2022-01-31 21:17:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 21:17:18,929 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-01-31 21:17:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:18,931 INFO L225 Difference]: With dead ends: 1383 [2022-01-31 21:17:18,931 INFO L226 Difference]: Without dead ends: 1378 [2022-01-31 21:17:18,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3874 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=649, Invalid=24791, Unknown=0, NotChecked=0, Total=25440 [2022-01-31 21:17:18,932 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 71 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 11580 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 11624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 11580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:18,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 395 Invalid, 11624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 11580 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 21:17:18,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1378 states. [2022-01-31 21:17:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1378 to 1325. [2022-01-31 21:17:19,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1320 states have (on average 1.262878787878788) internal successors, (1667), 1320 states have internal predecessors, (1667), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:19,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 1671 transitions. [2022-01-31 21:17:19,659 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 1671 transitions. Word has length 84 [2022-01-31 21:17:19,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:19,659 INFO L470 AbstractCegarLoop]: Abstraction has 1325 states and 1671 transitions. [2022-01-31 21:17:19,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 78 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:19,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 1671 transitions. [2022-01-31 21:17:19,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 21:17:19,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:19,659 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:19,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 21:17:19,660 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:19,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash -682262586, now seen corresponding path program 141 times [2022-01-31 21:17:19,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:19,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758745114] [2022-01-31 21:17:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:19,806 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:19,882 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:19,954 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:20,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:20,024 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:17:20,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:20,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:20,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 21:17:23,879 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 21:17:23,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758745114] [2022-01-31 21:17:23,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [758745114] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 21:17:23,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 21:17:23,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 21:17:23,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909518765] [2022-01-31 21:17:23,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 21:17:23,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 21:17:23,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 21:17:23,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 21:17:23,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=6085, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 21:17:23,881 INFO L87 Difference]: Start difference. First operand 1325 states and 1671 transitions. Second operand has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 21:17:29,038 INFO L93 Difference]: Finished difference Result 1370 states and 1718 transitions. [2022-01-31 21:17:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 21:17:29,039 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-01-31 21:17:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 21:17:29,040 INFO L225 Difference]: With dead ends: 1370 [2022-01-31 21:17:29,040 INFO L226 Difference]: Without dead ends: 1361 [2022-01-31 21:17:29,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3351 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=606, Invalid=22044, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 21:17:29,041 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 6207 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 6239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 6207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 21:17:29,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 380 Invalid, 6239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 6207 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 21:17:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1361 states. [2022-01-31 21:17:29,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1361 to 1360. [2022-01-31 21:17:29,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1355 states have (on average 1.256088560885609) internal successors, (1702), 1355 states have internal predecessors, (1702), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 1706 transitions. [2022-01-31 21:17:29,788 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 1706 transitions. Word has length 85 [2022-01-31 21:17:29,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 21:17:29,788 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 1706 transitions. [2022-01-31 21:17:29,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 75 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 21:17:29,788 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 1706 transitions. [2022-01-31 21:17:29,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-01-31 21:17:29,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 21:17:29,789 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 21:17:29,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 21:17:29,789 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 21:17:29,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 21:17:29,789 INFO L85 PathProgramCache]: Analyzing trace with hash -652382326, now seen corresponding path program 142 times [2022-01-31 21:17:29,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 21:17:29,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112412543] [2022-01-31 21:17:29,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 21:17:29,931 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:30,003 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:30,075 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:30,144 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 3 HavocedVariables, 3 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {0={1=1}, 1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-01-31 21:17:30,144 INFO L236 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-01-31 21:17:30,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 21:17:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:30,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 21:17:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 21:17:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.