/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/array-crafted/zero_sum_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:40:25,558 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:40:25,560 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:40:25,610 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:40:25,616 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:40:25,616 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:40:25,617 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:40:25,617 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:40:25,618 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:40:25,618 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:40:25,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:40:25,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:40:25,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:40:25,638 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:40:25,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:40:25,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:40:25,641 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:40:25,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:40:25,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:40:25,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:40:25,647 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 19:40:25,652 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:40:25,653 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:40:25,653 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:40:25,653 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:40:25,654 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:40:25,655 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:40:25,655 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:40:25,655 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:40:25,658 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:40:25,658 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:40:25,658 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:40:25,658 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:40:25,658 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:40:25,658 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:40:25,658 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:40:25,659 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:40:25,659 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:40:25,854 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:40:25,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:40:25,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:40:25,878 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:40:25,879 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:40:25,880 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2022-01-31 19:40:25,942 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5a2ecb0/407e0e3fdcd2430ca5d69a7715623440/FLAGb32da52ce [2022-01-31 19:40:26,305 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:40:26,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2022-01-31 19:40:26,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5a2ecb0/407e0e3fdcd2430ca5d69a7715623440/FLAGb32da52ce [2022-01-31 19:40:26,317 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a5a2ecb0/407e0e3fdcd2430ca5d69a7715623440 [2022-01-31 19:40:26,319 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:40:26,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:40:26,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:40:26,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:40:26,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:40:26,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,326 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b1acd22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26, skipping insertion in model container [2022-01-31 19:40:26,326 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:40:26,341 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:40:26,452 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m2.c[402,415] [2022-01-31 19:40:26,465 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:40:26,471 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:40:26,478 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m2.c[402,415] [2022-01-31 19:40:26,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:40:26,503 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:40:26,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26 WrapperNode [2022-01-31 19:40:26,503 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:40:26,504 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:40:26,504 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:40:26,504 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:40:26,512 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,516 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,516 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,520 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,523 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,524 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,525 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:40:26,526 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:40:26,526 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:40:26,526 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:40:26,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (1/1) ... [2022-01-31 19:40:26,531 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:40:26,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:40:26,546 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 19:40:26,553 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 19:40:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:40:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:40:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:40:26,576 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:40:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:40:26,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:40:26,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:40:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:40:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:40:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:40:26,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:40:26,630 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:40:26,631 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:40:26,742 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:40:26,746 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:40:26,746 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-31 19:40:26,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:40:26 BoogieIcfgContainer [2022-01-31 19:40:26,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:40:26,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:40:26,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:40:26,751 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:40:26,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:40:26" (1/3) ... [2022-01-31 19:40:26,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117e7f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:40:26, skipping insertion in model container [2022-01-31 19:40:26,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:40:26" (2/3) ... [2022-01-31 19:40:26,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117e7f9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:40:26, skipping insertion in model container [2022-01-31 19:40:26,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:40:26" (3/3) ... [2022-01-31 19:40:26,752 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2022-01-31 19:40:26,755 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:40:26,756 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:40:26,798 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:40:26,803 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 19:40:26,803 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:40:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 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 19:40:26,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-31 19:40:26,838 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:26,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:26,838 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:26,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1566444996, now seen corresponding path program 1 times [2022-01-31 19:40:26,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:26,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [207665931] [2022-01-31 19:40:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:26,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:26,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,075 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 19:40:27,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:27,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [207665931] [2022-01-31 19:40:27,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [207665931] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:27,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:27,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 19:40:27,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952140686] [2022-01-31 19:40:27,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:27,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 19:40:27,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:27,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 19:40:27,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:40:27,108 INFO L87 Difference]: Start difference. First operand has 34 states, 26 states have (on average 1.5) internal successors, (39), 27 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 19:40:27,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:27,199 INFO L93 Difference]: Finished difference Result 61 states and 83 transitions. [2022-01-31 19:40:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 19:40:27,202 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 19:40:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:27,210 INFO L225 Difference]: With dead ends: 61 [2022-01-31 19:40:27,210 INFO L226 Difference]: Without dead ends: 28 [2022-01-31 19:40:27,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 19:40:27,218 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:27,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 59 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-31 19:40:27,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-01-31 19:40:27,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-01-31 19:40:27,256 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 20 [2022-01-31 19:40:27,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:27,256 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-01-31 19:40:27,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 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 19:40:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-01-31 19:40:27,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 19:40:27,257 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:27,258 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:27,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:40:27,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:27,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:27,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1884388400, now seen corresponding path program 1 times [2022-01-31 19:40:27,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:27,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138226245] [2022-01-31 19:40:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:27,271 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:27,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:27,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:27,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,354 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 19:40:27,354 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:27,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138226245] [2022-01-31 19:40:27,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [138226245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:27,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:27,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:40:27,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181208304] [2022-01-31 19:40:27,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:27,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:40:27,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:27,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:40:27,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:40:27,356 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 19:40:27,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:27,439 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-01-31 19:40:27,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 19:40:27,440 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 19:40:27,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:27,441 INFO L225 Difference]: With dead ends: 49 [2022-01-31 19:40:27,441 INFO L226 Difference]: Without dead ends: 35 [2022-01-31 19:40:27,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:40:27,442 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:27,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 23 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-01-31 19:40:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2022-01-31 19:40:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 19:40:27,449 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 19:40:27,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:27,450 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 19:40:27,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 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 19:40:27,450 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 19:40:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-01-31 19:40:27,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:27,451 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:27,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:40:27,451 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:27,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:27,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1423722696, now seen corresponding path program 1 times [2022-01-31 19:40:27,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:27,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585149929] [2022-01-31 19:40:27,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:27,456 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:27,457 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:27,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:27,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,538 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 19:40:27,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:27,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585149929] [2022-01-31 19:40:27,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1585149929] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:27,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:27,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 19:40:27,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109458704] [2022-01-31 19:40:27,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:27,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 19:40:27,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:27,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 19:40:27,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:40:27,541 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 19:40:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:27,584 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2022-01-31 19:40:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:40:27,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 19:40:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:27,585 INFO L225 Difference]: With dead ends: 54 [2022-01-31 19:40:27,585 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 19:40:27,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 19:40:27,586 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 5 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:27,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:40:27,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 19:40:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-01-31 19:40:27,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:27,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 19:40:27,593 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 30 [2022-01-31 19:40:27,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:27,593 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 19:40:27,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 19:40:27,593 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 19:40:27,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-01-31 19:40:27,594 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:27,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:27,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:40:27,594 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:27,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:27,594 INFO L85 PathProgramCache]: Analyzing trace with hash 426220518, now seen corresponding path program 2 times [2022-01-31 19:40:27,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:27,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101300221] [2022-01-31 19:40:27,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:27,597 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:27,597 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:27,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:27,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:27,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:27,665 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 19:40:27,666 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:27,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101300221] [2022-01-31 19:40:27,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2101300221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:27,666 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:27,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:40:27,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299324512] [2022-01-31 19:40:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:27,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:40:27,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:40:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:40:27,679 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 19:40:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:27,770 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-01-31 19:40:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 19:40:27,770 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-01-31 19:40:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:27,771 INFO L225 Difference]: With dead ends: 58 [2022-01-31 19:40:27,771 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 19:40:27,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:40:27,772 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:27,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 27 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 19:40:27,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-01-31 19:40:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:27,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-01-31 19:40:27,781 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2022-01-31 19:40:27,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:27,781 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-01-31 19:40:27,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 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 19:40:27,781 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-01-31 19:40:27,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 19:40:27,782 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:27,782 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:27,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:40:27,782 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:27,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1736985310, now seen corresponding path program 3 times [2022-01-31 19:40:27,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:27,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1836019297] [2022-01-31 19:40:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:27,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:27,785 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:27,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:27,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:28,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:28,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:28,748 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 19:40:28,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:28,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1836019297] [2022-01-31 19:40:28,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1836019297] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:28,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:28,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:40:28,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029513777] [2022-01-31 19:40:28,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:28,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:40:28,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:28,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:40:28,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=496, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:40:28,752 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 22 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 19:40:29,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:29,103 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-01-31 19:40:29,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:40:29,105 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 22 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 19:40:29,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:29,106 INFO L225 Difference]: With dead ends: 67 [2022-01-31 19:40:29,106 INFO L226 Difference]: Without dead ends: 62 [2022-01-31 19:40:29,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:40:29,107 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:29,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 183 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:40:29,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-01-31 19:40:29,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 58. [2022-01-31 19:40:29,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:29,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 65 transitions. [2022-01-31 19:40:29,134 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 65 transitions. Word has length 40 [2022-01-31 19:40:29,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:29,134 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 65 transitions. [2022-01-31 19:40:29,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 22 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 19:40:29,134 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 65 transitions. [2022-01-31 19:40:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 19:40:29,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:29,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:29,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:40:29,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:29,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:29,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1964441596, now seen corresponding path program 4 times [2022-01-31 19:40:29,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:29,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405761282] [2022-01-31 19:40:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:29,137 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:29,138 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:29,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:29,138 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:29,233 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 19:40:29,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:29,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405761282] [2022-01-31 19:40:29,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405761282] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:29,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:29,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:40:29,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812966449] [2022-01-31 19:40:29,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:29,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:40:29,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:29,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:40:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:40:29,235 INFO L87 Difference]: Start difference. First operand 58 states and 65 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 19:40:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:29,385 INFO L93 Difference]: Finished difference Result 110 states and 124 transitions. [2022-01-31 19:40:29,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:40:29,385 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 42 [2022-01-31 19:40:29,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:29,386 INFO L225 Difference]: With dead ends: 110 [2022-01-31 19:40:29,386 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:40:29,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:40:29,388 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:29,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 58 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:29,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:40:29,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-01-31 19:40:29,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:29,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-01-31 19:40:29,398 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 42 [2022-01-31 19:40:29,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:29,398 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-01-31 19:40:29,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 19:40:29,398 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-01-31 19:40:29,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 19:40:29,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:29,399 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:29,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:40:29,399 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:29,399 INFO L85 PathProgramCache]: Analyzing trace with hash 798529050, now seen corresponding path program 5 times [2022-01-31 19:40:29,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:29,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1562126770] [2022-01-31 19:40:29,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:29,401 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:29,401 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:29,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:29,402 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:29,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:29,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:29,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:29,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:29,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1562126770] [2022-01-31 19:40:29,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1562126770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:29,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:29,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:40:29,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508931705] [2022-01-31 19:40:29,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:29,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:40:29,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:29,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:40:29,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:40:29,458 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 19:40:29,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:29,582 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-01-31 19:40:29,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:40:29,583 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 44 [2022-01-31 19:40:29,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:29,583 INFO L225 Difference]: With dead ends: 85 [2022-01-31 19:40:29,583 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 19:40:29,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:40:29,584 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 93 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:29,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 45 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:29,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 19:40:29,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-01-31 19:40:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2022-01-31 19:40:29,592 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 44 [2022-01-31 19:40:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:29,592 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2022-01-31 19:40:29,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 19:40:29,592 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2022-01-31 19:40:29,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-01-31 19:40:29,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:29,593 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:29,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:40:29,593 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash -506205836, now seen corresponding path program 6 times [2022-01-31 19:40:29,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:29,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677594893] [2022-01-31 19:40:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:29,595 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:29,595 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:29,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:29,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:29,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:30,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:30,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:30,888 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 19:40:30,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:30,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677594893] [2022-01-31 19:40:30,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [677594893] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:30,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:30,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:40:30,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526513348] [2022-01-31 19:40:30,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:30,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:40:30,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:30,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:40:30,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1250, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:40:30,890 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 36 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 19:40:32,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:32,021 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-01-31 19:40:32,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:40:32,022 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 36 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 19:40:32,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:32,023 INFO L225 Difference]: With dead ends: 86 [2022-01-31 19:40:32,023 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 19:40:32,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 732 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=318, Invalid=2544, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:40:32,024 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:32,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 146 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:40:32,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 19:40:32,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-01-31 19:40:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:32,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-01-31 19:40:32,036 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 50 [2022-01-31 19:40:32,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:32,036 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-01-31 19:40:32,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 36 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 19:40:32,037 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-01-31 19:40:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 19:40:32,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:32,037 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:32,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:40:32,038 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:32,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1834213102, now seen corresponding path program 7 times [2022-01-31 19:40:32,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:32,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381029602] [2022-01-31 19:40:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:32,039 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:32,040 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:32,040 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:32,040 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:32,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,116 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 19:40:32,117 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381029602] [2022-01-31 19:40:32,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381029602] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:32,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:32,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:40:32,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022427874] [2022-01-31 19:40:32,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:32,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:40:32,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:32,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:40:32,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:40:32,118 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 19:40:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:32,323 INFO L93 Difference]: Finished difference Result 138 states and 152 transitions. [2022-01-31 19:40:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:40:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 52 [2022-01-31 19:40:32,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:32,325 INFO L225 Difference]: With dead ends: 138 [2022-01-31 19:40:32,325 INFO L226 Difference]: Without dead ends: 75 [2022-01-31 19:40:32,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:40:32,326 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:32,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 71 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-01-31 19:40:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-01-31 19:40:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:32,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-01-31 19:40:32,352 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 52 [2022-01-31 19:40:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:32,352 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-01-31 19:40:32,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 19:40:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-01-31 19:40:32,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:40:32,355 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:32,355 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:32,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:40:32,356 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:32,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:32,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1400318384, now seen corresponding path program 8 times [2022-01-31 19:40:32,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:32,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744884774] [2022-01-31 19:40:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:32,359 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:32,359 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:32,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:32,360 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:32,430 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:32,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744884774] [2022-01-31 19:40:32,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744884774] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:32,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:32,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:40:32,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246295838] [2022-01-31 19:40:32,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:32,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:40:32,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:32,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:40:32,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:40:32,432 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 19:40:32,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:32,585 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2022-01-31 19:40:32,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 19:40:32,586 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 54 [2022-01-31 19:40:32,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:32,586 INFO L225 Difference]: With dead ends: 103 [2022-01-31 19:40:32,586 INFO L226 Difference]: Without dead ends: 61 [2022-01-31 19:40:32,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:40:32,587 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 112 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:32,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 55 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:32,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-01-31 19:40:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-01-31 19:40:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0892857142857142) internal successors, (61), 56 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2022-01-31 19:40:32,596 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 54 [2022-01-31 19:40:32,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:32,596 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2022-01-31 19:40:32,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 19:40:32,596 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2022-01-31 19:40:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-01-31 19:40:32,597 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:32,597 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:32,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:40:32,597 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:32,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:32,597 INFO L85 PathProgramCache]: Analyzing trace with hash 420316298, now seen corresponding path program 9 times [2022-01-31 19:40:32,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:32,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593407302] [2022-01-31 19:40:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:32,598 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:32,599 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:32,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:32,599 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:32,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:34,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:34,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:34,715 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 19:40:34,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:34,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593407302] [2022-01-31 19:40:34,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [593407302] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:34,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:34,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 19:40:34,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249898263] [2022-01-31 19:40:34,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:34,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 19:40:34,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:34,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 19:40:34,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=2132, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 19:40:34,717 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 47 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 19:40:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:36,731 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2022-01-31 19:40:36,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:40:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 47 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 19:40:36,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:36,732 INFO L225 Difference]: With dead ends: 112 [2022-01-31 19:40:36,732 INFO L226 Difference]: Without dead ends: 107 [2022-01-31 19:40:36,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=537, Invalid=5469, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:40:36,735 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 1267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:36,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 195 Invalid, 1267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:40:36,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-01-31 19:40:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2022-01-31 19:40:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.098901098901099) internal successors, (100), 91 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-01-31 19:40:36,774 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 60 [2022-01-31 19:40:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:36,774 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-01-31 19:40:36,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 47 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 19:40:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-01-31 19:40:36,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:40:36,775 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:36,775 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:36,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:40:36,776 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:36,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:36,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1094065832, now seen corresponding path program 10 times [2022-01-31 19:40:36,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:36,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51954923] [2022-01-31 19:40:36,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:36,779 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:36,779 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:36,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:36,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:36,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:36,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:36,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:36,870 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 19:40:36,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:36,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51954923] [2022-01-31 19:40:36,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [51954923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:36,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:36,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:40:36,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808990065] [2022-01-31 19:40:36,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:36,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:40:36,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:36,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:40:36,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:40:36,872 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 19:40:37,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:37,061 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2022-01-31 19:40:37,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:40:37,062 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 62 [2022-01-31 19:40:37,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:37,062 INFO L225 Difference]: With dead ends: 141 [2022-01-31 19:40:37,063 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 19:40:37,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:40:37,063 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 52 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:37,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 63 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:37,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 19:40:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-01-31 19:40:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 58 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-01-31 19:40:37,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 62 [2022-01-31 19:40:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:37,076 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-01-31 19:40:37,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 19:40:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-01-31 19:40:37,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:40:37,078 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:37,078 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:37,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:40:37,079 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash -2071130328, now seen corresponding path program 11 times [2022-01-31 19:40:37,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:37,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849225826] [2022-01-31 19:40:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:37,081 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:37,081 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:37,081 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:37,082 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:37,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:37,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:37,166 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 19:40:37,166 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:37,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849225826] [2022-01-31 19:40:37,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [849225826] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:37,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:37,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:40:37,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61744917] [2022-01-31 19:40:37,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:37,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:40:37,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:37,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:40:37,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:40:37,167 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 19:40:37,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:37,355 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-01-31 19:40:37,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 19:40:37,355 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 62 [2022-01-31 19:40:37,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:37,356 INFO L225 Difference]: With dead ends: 106 [2022-01-31 19:40:37,356 INFO L226 Difference]: Without dead ends: 71 [2022-01-31 19:40:37,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:40:37,356 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:37,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 61 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-01-31 19:40:37,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-01-31 19:40:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0757575757575757) internal successors, (71), 66 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2022-01-31 19:40:37,369 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 62 [2022-01-31 19:40:37,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:37,369 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2022-01-31 19:40:37,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 19:40:37,370 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2022-01-31 19:40:37,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 19:40:37,370 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:37,370 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:37,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:40:37,370 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:37,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:37,371 INFO L85 PathProgramCache]: Analyzing trace with hash -368346080, now seen corresponding path program 12 times [2022-01-31 19:40:37,371 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:37,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995724103] [2022-01-31 19:40:37,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:37,372 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:37,372 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:37,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:37,374 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:40,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:40,077 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 19:40:40,078 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:40,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995724103] [2022-01-31 19:40:40,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995724103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:40,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:40,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 19:40:40,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061941199] [2022-01-31 19:40:40,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:40,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 19:40:40,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:40,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 19:40:40,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=2816, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:40:40,079 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 54 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 19:40:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:42,771 INFO L93 Difference]: Finished difference Result 118 states and 125 transitions. [2022-01-31 19:40:42,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:40:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 54 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 19:40:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:42,772 INFO L225 Difference]: With dead ends: 118 [2022-01-31 19:40:42,772 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 19:40:42,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=715, Invalid=6595, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:40:42,774 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 1670 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:42,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 217 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1670 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:40:42,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 19:40:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 100. [2022-01-31 19:40:42,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:42,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 107 transitions. [2022-01-31 19:40:42,801 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 107 transitions. Word has length 70 [2022-01-31 19:40:42,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:42,802 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 107 transitions. [2022-01-31 19:40:42,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 54 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 19:40:42,802 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 107 transitions. [2022-01-31 19:40:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 19:40:42,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:42,802 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:42,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:40:42,803 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:42,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:42,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1468835650, now seen corresponding path program 13 times [2022-01-31 19:40:42,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:42,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270584072] [2022-01-31 19:40:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:42,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:42,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:42,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:42,805 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:42,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:42,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:42,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:42,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270584072] [2022-01-31 19:40:42,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [270584072] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:42,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:42,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:40:42,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187909171] [2022-01-31 19:40:42,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:42,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:40:42,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:42,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:40:42,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:40:42,906 INFO L87 Difference]: Start difference. First operand 100 states and 107 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 19:40:43,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:43,131 INFO L93 Difference]: Finished difference Result 194 states and 208 transitions. [2022-01-31 19:40:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:40:43,132 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 72 [2022-01-31 19:40:43,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:43,132 INFO L225 Difference]: With dead ends: 194 [2022-01-31 19:40:43,132 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 19:40:43,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:40:43,133 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:43,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 64 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 19:40:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-01-31 19:40:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0824742268041236) internal successors, (105), 97 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:43,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 109 transitions. [2022-01-31 19:40:43,151 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 109 transitions. Word has length 72 [2022-01-31 19:40:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:43,151 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 109 transitions. [2022-01-31 19:40:43,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 19:40:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 109 transitions. [2022-01-31 19:40:43,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 19:40:43,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:43,152 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:43,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:40:43,152 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:43,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1546525092, now seen corresponding path program 14 times [2022-01-31 19:40:43,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:43,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776663860] [2022-01-31 19:40:43,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:43,154 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:43,154 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:43,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:43,155 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:43,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:43,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:43,249 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 19:40:43,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:43,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776663860] [2022-01-31 19:40:43,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776663860] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:43,250 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:43,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:40:43,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788019631] [2022-01-31 19:40:43,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:43,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:40:43,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:40:43,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:40:43,251 INFO L87 Difference]: Start difference. First operand 102 states and 109 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 19:40:43,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:43,471 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2022-01-31 19:40:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:40:43,472 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 74 [2022-01-31 19:40:43,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:43,472 INFO L225 Difference]: With dead ends: 139 [2022-01-31 19:40:43,472 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 19:40:43,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=157, Invalid=395, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:40:43,473 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 147 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:43,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 65 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:40:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 19:40:43,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-01-31 19:40:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 76 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:43,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-01-31 19:40:43,487 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 74 [2022-01-31 19:40:43,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:43,487 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-01-31 19:40:43,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 19:40:43,487 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-01-31 19:40:43,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:40:43,487 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:43,488 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:43,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:40:43,488 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:43,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1865166902, now seen corresponding path program 15 times [2022-01-31 19:40:43,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:43,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367841449] [2022-01-31 19:40:43,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:43,489 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:43,489 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:43,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:43,490 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:43,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:46,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:46,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:40:46,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:46,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367841449] [2022-01-31 19:40:46,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [367841449] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:46,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:46,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 19:40:46,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317026123] [2022-01-31 19:40:46,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:46,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 19:40:46,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:46,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 19:40:46,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=3954, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:40:46,980 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 64 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 19:40:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:50,975 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2022-01-31 19:40:50,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 19:40:50,975 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 64 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 19:40:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:50,976 INFO L225 Difference]: With dead ends: 133 [2022-01-31 19:40:50,976 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 19:40:50,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2817 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=999, Invalid=10557, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 19:40:50,979 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 2206 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 2206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:50,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 261 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 2206 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:40:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 19:40:51,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2022-01-31 19:40:51,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.073394495412844) internal successors, (117), 109 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:51,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 121 transitions. [2022-01-31 19:40:51,004 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 121 transitions. Word has length 80 [2022-01-31 19:40:51,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:51,005 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 121 transitions. [2022-01-31 19:40:51,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 64 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 19:40:51,005 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 121 transitions. [2022-01-31 19:40:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:40:51,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:51,005 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:51,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:40:51,005 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash 732573524, now seen corresponding path program 16 times [2022-01-31 19:40:51,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626600954] [2022-01-31 19:40:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:51,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:51,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:51,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:51,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:51,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:51,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:51,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:51,119 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 19:40:51,119 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:51,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626600954] [2022-01-31 19:40:51,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1626600954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:51,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:51,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:40:51,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922909534] [2022-01-31 19:40:51,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:51,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:40:51,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:51,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:40:51,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:40:51,120 INFO L87 Difference]: Start difference. First operand 114 states and 121 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 19:40:51,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:51,432 INFO L93 Difference]: Finished difference Result 222 states and 236 transitions. [2022-01-31 19:40:51,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:40:51,432 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 82 [2022-01-31 19:40:51,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:51,433 INFO L225 Difference]: With dead ends: 222 [2022-01-31 19:40:51,433 INFO L226 Difference]: Without dead ends: 117 [2022-01-31 19:40:51,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:40:51,434 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 64 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:51,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 79 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:40:51,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-31 19:40:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-01-31 19:40:51,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.072072072072072) internal successors, (119), 111 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 123 transitions. [2022-01-31 19:40:51,459 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 123 transitions. Word has length 82 [2022-01-31 19:40:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 123 transitions. [2022-01-31 19:40:51,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 19:40:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 123 transitions. [2022-01-31 19:40:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:40:51,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:51,460 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:51,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:40:51,460 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:51,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash -450703502, now seen corresponding path program 17 times [2022-01-31 19:40:51,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:51,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217985456] [2022-01-31 19:40:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:51,462 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:51,462 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:51,462 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:51,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:51,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:51,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:51,587 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 19:40:51,587 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:51,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217985456] [2022-01-31 19:40:51,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1217985456] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:51,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:51,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:40:51,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077297029] [2022-01-31 19:40:51,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:51,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:40:51,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:51,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:40:51,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:40:51,589 INFO L87 Difference]: Start difference. First operand 116 states and 123 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 19:40:51,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:40:51,838 INFO L93 Difference]: Finished difference Result 157 states and 169 transitions. [2022-01-31 19:40:51,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 19:40:51,839 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 84 [2022-01-31 19:40:51,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:40:51,839 INFO L225 Difference]: With dead ends: 157 [2022-01-31 19:40:51,839 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 19:40:51,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:40:51,840 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 131 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:40:51,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 73 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:40:51,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 19:40:51,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-01-31 19:40:51,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:40:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-01-31 19:40:51,872 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 84 [2022-01-31 19:40:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:40:51,872 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-01-31 19:40:51,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 19:40:51,872 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-01-31 19:40:51,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 19:40:51,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:40:51,874 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:40:51,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:40:51,874 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:40:51,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:40:51,875 INFO L85 PathProgramCache]: Analyzing trace with hash 911605964, now seen corresponding path program 18 times [2022-01-31 19:40:51,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:40:51,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240054237] [2022-01-31 19:40:51,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:40:51,877 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:40:51,877 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:40:51,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:40:51,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:40:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:56,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:40:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:40:56,009 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 19:40:56,009 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:40:56,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240054237] [2022-01-31 19:40:56,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240054237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:40:56,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:40:56,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 19:40:56,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749726709] [2022-01-31 19:40:56,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:40:56,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 19:40:56,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:40:56,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 19:40:56,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=555, Invalid=4995, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:40:56,011 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 75 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 73 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:00,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:00,100 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2022-01-31 19:41:00,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 19:41:00,100 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 73 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2022-01-31 19:41:00,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:00,101 INFO L225 Difference]: With dead ends: 149 [2022-01-31 19:41:00,101 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 19:41:00,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3198 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1198, Invalid=11234, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 19:41:00,104 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 3074 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 3270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 3074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:00,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 311 Invalid, 3270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 3074 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:41:00,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 19:41:00,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2022-01-31 19:41:00,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.065040650406504) internal successors, (131), 123 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:00,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 135 transitions. [2022-01-31 19:41:00,143 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 135 transitions. Word has length 90 [2022-01-31 19:41:00,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:00,143 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 135 transitions. [2022-01-31 19:41:00,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1466666666666667) internal successors, (86), 73 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:00,144 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 135 transitions. [2022-01-31 19:41:00,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 19:41:00,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:00,144 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:00,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:41:00,145 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:00,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:00,145 INFO L85 PathProgramCache]: Analyzing trace with hash 531169898, now seen corresponding path program 19 times [2022-01-31 19:41:00,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:00,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698359012] [2022-01-31 19:41:00,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:00,148 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:00,148 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:00,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:00,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:00,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:00,294 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 19:41:00,294 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:00,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698359012] [2022-01-31 19:41:00,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [698359012] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:00,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:00,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:41:00,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556978922] [2022-01-31 19:41:00,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:00,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:41:00,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:00,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:41:00,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:41:00,296 INFO L87 Difference]: Start difference. First operand 128 states and 135 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 19:41:00,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:00,667 INFO L93 Difference]: Finished difference Result 250 states and 264 transitions. [2022-01-31 19:41:00,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:41:00,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 92 [2022-01-31 19:41:00,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:00,668 INFO L225 Difference]: With dead ends: 250 [2022-01-31 19:41:00,668 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 19:41:00,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:41:00,669 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 65 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:00,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 77 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:41:00,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 19:41:00,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-01-31 19:41:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.064) internal successors, (133), 125 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:00,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 137 transitions. [2022-01-31 19:41:00,704 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 137 transitions. Word has length 92 [2022-01-31 19:41:00,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:00,704 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 137 transitions. [2022-01-31 19:41:00,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 19:41:00,704 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 137 transitions. [2022-01-31 19:41:00,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 19:41:00,705 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:00,705 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:00,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:41:00,705 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:00,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash -978938616, now seen corresponding path program 20 times [2022-01-31 19:41:00,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:00,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598142789] [2022-01-31 19:41:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:00,706 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:00,706 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:00,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:00,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:00,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:00,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:00,869 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 19:41:00,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:00,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598142789] [2022-01-31 19:41:00,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [598142789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:00,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:00,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:41:00,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157154464] [2022-01-31 19:41:00,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:00,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:41:00,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:41:00,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:41:00,871 INFO L87 Difference]: Start difference. First operand 130 states and 137 transitions. Second operand has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 19:41:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:01,133 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2022-01-31 19:41:01,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:41:01,133 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 94 [2022-01-31 19:41:01,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:01,135 INFO L225 Difference]: With dead ends: 175 [2022-01-31 19:41:01,135 INFO L226 Difference]: Without dead ends: 101 [2022-01-31 19:41:01,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=617, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:41:01,136 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 212 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:01,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 53 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:41:01,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-01-31 19:41:01,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-01-31 19:41:01,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 96 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:01,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-01-31 19:41:01,162 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 94 [2022-01-31 19:41:01,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:01,162 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-01-31 19:41:01,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.6) internal successors, (52), 19 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 19:41:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-01-31 19:41:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:41:01,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:01,163 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:01,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:41:01,163 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash -151564830, now seen corresponding path program 21 times [2022-01-31 19:41:01,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:01,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359906845] [2022-01-31 19:41:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:01,164 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:01,164 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:01,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:01,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:06,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:06,451 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 19:41:06,451 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:06,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359906845] [2022-01-31 19:41:06,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [359906845] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:06,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:06,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 19:41:06,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861950389] [2022-01-31 19:41:06,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:06,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 19:41:06,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:06,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 19:41:06,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=6278, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:41:06,452 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 84 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:10,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:10,354 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2022-01-31 19:41:10,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 19:41:10,355 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-01-31 19:41:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:10,356 INFO L225 Difference]: With dead ends: 165 [2022-01-31 19:41:10,356 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 19:41:10,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1052, Invalid=11380, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 19:41:10,357 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 3266 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 3470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 3266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:10,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 308 Invalid, 3470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 3266 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:41:10,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 19:41:10,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 142. [2022-01-31 19:41:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0583941605839415) internal successors, (145), 137 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:10,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 149 transitions. [2022-01-31 19:41:10,401 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 149 transitions. Word has length 100 [2022-01-31 19:41:10,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:10,402 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 149 transitions. [2022-01-31 19:41:10,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:10,402 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 149 transitions. [2022-01-31 19:41:10,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:41:10,402 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:10,402 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:10,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:41:10,403 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:10,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:10,403 INFO L85 PathProgramCache]: Analyzing trace with hash 12988928, now seen corresponding path program 22 times [2022-01-31 19:41:10,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:10,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704448910] [2022-01-31 19:41:10,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:10,404 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:10,404 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:10,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:10,405 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:10,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:10,574 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 19:41:10,574 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:10,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704448910] [2022-01-31 19:41:10,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [704448910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:10,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:10,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:41:10,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032957986] [2022-01-31 19:41:10,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:10,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:41:10,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:41:10,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:41:10,575 INFO L87 Difference]: Start difference. First operand 142 states and 149 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 19:41:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:10,946 INFO L93 Difference]: Finished difference Result 278 states and 292 transitions. [2022-01-31 19:41:10,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:41:10,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 102 [2022-01-31 19:41:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:10,947 INFO L225 Difference]: With dead ends: 278 [2022-01-31 19:41:10,947 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 19:41:10,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=224, Invalid=832, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:41:10,948 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 71 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:10,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 65 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:41:10,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 19:41:10,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-01-31 19:41:10,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0575539568345325) internal successors, (147), 139 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:10,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 151 transitions. [2022-01-31 19:41:10,991 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 151 transitions. Word has length 102 [2022-01-31 19:41:10,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:10,991 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 151 transitions. [2022-01-31 19:41:10,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 19:41:10,991 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 151 transitions. [2022-01-31 19:41:10,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:41:10,992 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:10,992 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:10,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:41:10,992 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:10,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1637586718, now seen corresponding path program 23 times [2022-01-31 19:41:10,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:10,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329129582] [2022-01-31 19:41:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:10,993 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:10,994 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:10,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:10,994 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:11,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:11,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:11,175 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 19:41:11,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:11,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329129582] [2022-01-31 19:41:11,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [329129582] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:11,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:11,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:41:11,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16817948] [2022-01-31 19:41:11,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:11,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:41:11,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:11,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:41:11,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:41:11,176 INFO L87 Difference]: Start difference. First operand 144 states and 151 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 19:41:11,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:11,492 INFO L93 Difference]: Finished difference Result 193 states and 205 transitions. [2022-01-31 19:41:11,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:41:11,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 104 [2022-01-31 19:41:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:11,493 INFO L225 Difference]: With dead ends: 193 [2022-01-31 19:41:11,493 INFO L226 Difference]: Without dead ends: 111 [2022-01-31 19:41:11,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:41:11,496 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 262 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:11,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 67 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:41:11,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-31 19:41:11,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-01-31 19:41:11,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0471698113207548) internal successors, (111), 106 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:11,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 115 transitions. [2022-01-31 19:41:11,545 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 115 transitions. Word has length 104 [2022-01-31 19:41:11,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:11,546 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 115 transitions. [2022-01-31 19:41:11,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 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 19:41:11,546 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 115 transitions. [2022-01-31 19:41:11,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:41:11,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:11,546 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:11,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:41:11,547 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:11,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:11,547 INFO L85 PathProgramCache]: Analyzing trace with hash -939100296, now seen corresponding path program 24 times [2022-01-31 19:41:11,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:11,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671104648] [2022-01-31 19:41:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:11,548 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:11,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:11,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:11,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:11,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:18,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:18,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:18,448 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 19:41:18,448 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:18,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671104648] [2022-01-31 19:41:18,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1671104648] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:18,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:18,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 19:41:18,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567911657] [2022-01-31 19:41:18,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:18,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 19:41:18,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:18,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 19:41:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=7594, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 19:41:18,450 INFO L87 Difference]: Start difference. First operand 111 states and 115 transitions. Second operand has 92 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 90 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:25,076 INFO L93 Difference]: Finished difference Result 181 states and 188 transitions. [2022-01-31 19:41:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 19:41:25,077 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 90 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-01-31 19:41:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:25,077 INFO L225 Difference]: With dead ends: 181 [2022-01-31 19:41:25,077 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 19:41:25,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4869 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1911, Invalid=17271, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 19:41:25,083 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 3982 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 4242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 3982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:25,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 353 Invalid, 4242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 3982 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:41:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 19:41:25,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 156. [2022-01-31 19:41:25,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0529801324503312) internal successors, (159), 151 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:25,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 163 transitions. [2022-01-31 19:41:25,143 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 163 transitions. Word has length 110 [2022-01-31 19:41:25,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:25,143 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 163 transitions. [2022-01-31 19:41:25,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.1521739130434783) internal successors, (106), 90 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:25,143 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 163 transitions. [2022-01-31 19:41:25,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 19:41:25,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:25,144 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:25,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:41:25,144 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:25,145 INFO L85 PathProgramCache]: Analyzing trace with hash 685776406, now seen corresponding path program 25 times [2022-01-31 19:41:25,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:25,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9463497] [2022-01-31 19:41:25,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:25,146 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:25,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:25,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:25,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:25,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:25,343 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9463497] [2022-01-31 19:41:25,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [9463497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:25,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:25,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:41:25,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059295254] [2022-01-31 19:41:25,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:25,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:41:25,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:41:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:41:25,344 INFO L87 Difference]: Start difference. First operand 156 states and 163 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 19:41:25,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:25,845 INFO L93 Difference]: Finished difference Result 306 states and 320 transitions. [2022-01-31 19:41:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:41:25,845 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 112 [2022-01-31 19:41:25,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:25,846 INFO L225 Difference]: With dead ends: 306 [2022-01-31 19:41:25,846 INFO L226 Difference]: Without dead ends: 159 [2022-01-31 19:41:25,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=993, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:41:25,847 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:25,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 70 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:41:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-01-31 19:41:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2022-01-31 19:41:25,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0522875816993464) internal successors, (161), 153 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2022-01-31 19:41:25,902 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 112 [2022-01-31 19:41:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:25,902 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2022-01-31 19:41:25,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 19:41:25,903 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2022-01-31 19:41:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:41:25,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:25,903 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:25,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:41:25,904 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:25,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash -255314508, now seen corresponding path program 26 times [2022-01-31 19:41:25,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:25,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100123800] [2022-01-31 19:41:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:25,905 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:25,905 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:25,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:25,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:26,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:26,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100123800] [2022-01-31 19:41:26,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100123800] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:26,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:26,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:41:26,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042611951] [2022-01-31 19:41:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:26,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:41:26,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:41:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:41:26,086 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 19:41:26,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:26,438 INFO L93 Difference]: Finished difference Result 211 states and 223 transitions. [2022-01-31 19:41:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:41:26,439 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 114 [2022-01-31 19:41:26,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:26,439 INFO L225 Difference]: With dead ends: 211 [2022-01-31 19:41:26,439 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:41:26,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=373, Invalid=887, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:41:26,440 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 229 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:26,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 53 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:41:26,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:41:26,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-01-31 19:41:26,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.043103448275862) internal successors, (121), 116 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:26,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2022-01-31 19:41:26,482 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 114 [2022-01-31 19:41:26,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:26,482 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2022-01-31 19:41:26,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5) internal successors, (60), 23 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 19:41:26,482 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2022-01-31 19:41:26,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:41:26,483 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:26,483 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:26,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:41:26,483 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:26,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:26,483 INFO L85 PathProgramCache]: Analyzing trace with hash -704520818, now seen corresponding path program 27 times [2022-01-31 19:41:26,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:26,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858751102] [2022-01-31 19:41:26,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:26,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:26,485 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:26,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:26,485 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:35,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:35,233 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 19:41:35,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:35,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858751102] [2022-01-31 19:41:35,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [858751102] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:35,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:35,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 19:41:35,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324312555] [2022-01-31 19:41:35,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:35,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 19:41:35,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:35,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 19:41:35,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1022, Invalid=9280, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 19:41:35,236 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 100 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:42,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:42,523 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2022-01-31 19:41:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 19:41:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 100 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-01-31 19:41:42,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:42,524 INFO L225 Difference]: With dead ends: 197 [2022-01-31 19:41:42,524 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 19:41:42,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6490 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=2060, Invalid=20290, Unknown=0, NotChecked=0, Total=22350 [2022-01-31 19:41:42,525 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 4608 mSolverCounterSat, 277 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 4885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 277 IncrementalHoareTripleChecker+Valid, 4608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:42,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 375 Invalid, 4885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [277 Valid, 4608 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 19:41:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 19:41:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 170. [2022-01-31 19:41:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0484848484848486) internal successors, (173), 165 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2022-01-31 19:41:42,597 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 120 [2022-01-31 19:41:42,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:42,597 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2022-01-31 19:41:42,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 100 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:42,597 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2022-01-31 19:41:42,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:41:42,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:42,598 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:42,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:41:42,598 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:42,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:42,598 INFO L85 PathProgramCache]: Analyzing trace with hash 89990828, now seen corresponding path program 28 times [2022-01-31 19:41:42,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:42,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1394096331] [2022-01-31 19:41:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:42,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:42,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:42,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:42,600 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:42,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:42,812 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 19:41:42,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:42,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1394096331] [2022-01-31 19:41:42,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1394096331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:42,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:42,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:41:42,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602882488] [2022-01-31 19:41:42,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:42,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:41:42,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:41:42,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:41:42,814 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 19:41:43,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:43,337 INFO L93 Difference]: Finished difference Result 334 states and 348 transitions. [2022-01-31 19:41:43,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:41:43,337 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 122 [2022-01-31 19:41:43,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:43,338 INFO L225 Difference]: With dead ends: 334 [2022-01-31 19:41:43,338 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 19:41:43,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=1168, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:41:43,339 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 79 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:43,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 69 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:41:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 19:41:43,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-01-31 19:41:43,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0479041916167664) internal successors, (175), 167 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:43,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 179 transitions. [2022-01-31 19:41:43,412 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 179 transitions. Word has length 122 [2022-01-31 19:41:43,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:43,412 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 179 transitions. [2022-01-31 19:41:43,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 19:41:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 179 transitions. [2022-01-31 19:41:43,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:41:43,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:43,413 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:43,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:41:43,413 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:43,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:43,413 INFO L85 PathProgramCache]: Analyzing trace with hash 2088423626, now seen corresponding path program 29 times [2022-01-31 19:41:43,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:43,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430057921] [2022-01-31 19:41:43,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:43,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:43,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:43,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:43,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:43,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:43,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:43,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:41:43,634 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:43,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430057921] [2022-01-31 19:41:43,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [430057921] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:43,634 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:43,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:41:43,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541602034] [2022-01-31 19:41:43,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:43,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:41:43,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:43,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:41:43,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=500, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:41:43,635 INFO L87 Difference]: Start difference. First operand 172 states and 179 transitions. Second operand has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 19:41:44,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:41:44,037 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2022-01-31 19:41:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:41:44,037 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 124 [2022-01-31 19:41:44,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:41:44,038 INFO L225 Difference]: With dead ends: 229 [2022-01-31 19:41:44,038 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 19:41:44,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:41:44,038 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 242 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:41:44,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 59 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:41:44,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 19:41:44,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-31 19:41:44,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 126 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:41:44,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-01-31 19:41:44,103 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 124 [2022-01-31 19:41:44,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:41:44,103 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-01-31 19:41:44,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.4615384615384617) internal successors, (64), 25 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 19:41:44,103 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-01-31 19:41:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 19:41:44,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:41:44,104 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:41:44,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:41:44,104 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:41:44,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:41:44,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1729109980, now seen corresponding path program 30 times [2022-01-31 19:41:44,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:41:44,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286336411] [2022-01-31 19:41:44,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:41:44,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:41:44,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:41:44,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:41:44,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:41:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:54,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:41:54,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:41:54,174 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 19:41:54,175 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:41:54,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286336411] [2022-01-31 19:41:54,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1286336411] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:41:54,175 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:41:54,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 19:41:54,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575209029] [2022-01-31 19:41:54,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:41:54,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 19:41:54,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:41:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 19:41:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1107, Invalid=10883, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 19:41:54,177 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 110 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 108 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:05,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:05,435 INFO L93 Difference]: Finished difference Result 213 states and 220 transitions. [2022-01-31 19:42:05,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 19:42:05,435 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 108 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-01-31 19:42:05,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:05,436 INFO L225 Difference]: With dead ends: 213 [2022-01-31 19:42:05,436 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 19:42:05,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7634 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=2942, Invalid=26128, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 19:42:05,438 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 5229 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 5521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 5229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:05,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 356 Invalid, 5521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 5229 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 19:42:05,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 19:42:05,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 184. [2022-01-31 19:42:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.0446927374301676) internal successors, (187), 179 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:05,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2022-01-31 19:42:05,548 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 130 [2022-01-31 19:42:05,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:05,548 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2022-01-31 19:42:05,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.1454545454545455) internal successors, (126), 108 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:05,548 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2022-01-31 19:42:05,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:42:05,549 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:05,549 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:05,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:42:05,549 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:05,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:05,549 INFO L85 PathProgramCache]: Analyzing trace with hash -852775998, now seen corresponding path program 31 times [2022-01-31 19:42:05,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:05,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [377781576] [2022-01-31 19:42:05,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:05,550 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:05,550 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:05,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:05,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:05,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:05,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:05,792 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 19:42:05,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:05,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [377781576] [2022-01-31 19:42:05,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [377781576] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:05,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:05,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:42:05,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131901665] [2022-01-31 19:42:05,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:05,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:42:05,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:42:05,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:42:05,793 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:42:06,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:06,464 INFO L93 Difference]: Finished difference Result 362 states and 376 transitions. [2022-01-31 19:42:06,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:42:06,464 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 132 [2022-01-31 19:42:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:06,465 INFO L225 Difference]: With dead ends: 362 [2022-01-31 19:42:06,465 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 19:42:06,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=365, Invalid=1357, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:42:06,466 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:06,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 99 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:42:06,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 19:42:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-01-31 19:42:06,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.0441988950276244) internal successors, (189), 181 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:06,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 193 transitions. [2022-01-31 19:42:06,562 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 193 transitions. Word has length 132 [2022-01-31 19:42:06,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:06,562 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 193 transitions. [2022-01-31 19:42:06,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:42:06,562 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 193 transitions. [2022-01-31 19:42:06,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:42:06,562 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:06,563 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:06,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:42:06,563 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash 361351264, now seen corresponding path program 32 times [2022-01-31 19:42:06,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:06,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009743126] [2022-01-31 19:42:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:06,564 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:06,564 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:06,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:06,565 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:06,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:06,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:06,815 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 19:42:06,815 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:06,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009743126] [2022-01-31 19:42:06,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1009743126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:06,815 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:06,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:42:06,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97012299] [2022-01-31 19:42:06,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:06,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:42:06,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:06,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:42:06,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=581, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:42:06,816 INFO L87 Difference]: Start difference. First operand 186 states and 193 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:42:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:07,295 INFO L93 Difference]: Finished difference Result 247 states and 259 transitions. [2022-01-31 19:42:07,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:42:07,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 134 [2022-01-31 19:42:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:07,296 INFO L225 Difference]: With dead ends: 247 [2022-01-31 19:42:07,296 INFO L226 Difference]: Without dead ends: 141 [2022-01-31 19:42:07,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=517, Invalid=1205, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:42:07,297 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 441 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:07,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [441 Valid, 73 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:42:07,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-31 19:42:07,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-01-31 19:42:07,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.036764705882353) internal successors, (141), 136 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:07,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 145 transitions. [2022-01-31 19:42:07,369 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 145 transitions. Word has length 134 [2022-01-31 19:42:07,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:07,369 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 145 transitions. [2022-01-31 19:42:07,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 27 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 19:42:07,369 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 145 transitions. [2022-01-31 19:42:07,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:42:07,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:07,370 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:07,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:42:07,370 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:07,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:07,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1973493958, now seen corresponding path program 33 times [2022-01-31 19:42:07,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:07,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389714949] [2022-01-31 19:42:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:07,371 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:07,371 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:07,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:07,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:07,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:18,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:18,644 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 19:42:18,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:18,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389714949] [2022-01-31 19:42:18,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [389714949] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:18,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:18,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 19:42:18,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974778855] [2022-01-31 19:42:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:18,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 19:42:18,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 19:42:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1398, Invalid=12644, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 19:42:18,646 INFO L87 Difference]: Start difference. First operand 141 states and 145 transitions. Second operand has 119 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 117 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:30,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:30,688 INFO L93 Difference]: Finished difference Result 226 states and 233 transitions. [2022-01-31 19:42:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 19:42:30,688 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 117 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-01-31 19:42:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:30,689 INFO L225 Difference]: With dead ends: 226 [2022-01-31 19:42:30,689 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 19:42:30,690 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9733 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=3105, Invalid=29837, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 19:42:30,690 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 6036 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 6334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 6036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:30,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 418 Invalid, 6334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 6036 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 19:42:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 19:42:30,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 198. [2022-01-31 19:42:30,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0414507772020725) internal successors, (201), 193 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 205 transitions. [2022-01-31 19:42:30,811 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 205 transitions. Word has length 140 [2022-01-31 19:42:30,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:30,811 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 205 transitions. [2022-01-31 19:42:30,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.1428571428571428) internal successors, (136), 117 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:30,811 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 205 transitions. [2022-01-31 19:42:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:42:30,811 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:30,812 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:30,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:42:30,812 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1228796584, now seen corresponding path program 34 times [2022-01-31 19:42:30,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:30,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399064799] [2022-01-31 19:42:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:30,813 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:30,813 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:30,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:30,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:30,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:31,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:31,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:31,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:31,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399064799] [2022-01-31 19:42:31,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399064799] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:31,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:31,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:42:31,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745620327] [2022-01-31 19:42:31,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:31,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:42:31,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:31,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:42:31,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:42:31,089 INFO L87 Difference]: Start difference. First operand 198 states and 205 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 19:42:31,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:31,790 INFO L93 Difference]: Finished difference Result 390 states and 404 transitions. [2022-01-31 19:42:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:42:31,791 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 142 [2022-01-31 19:42:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:31,791 INFO L225 Difference]: With dead ends: 390 [2022-01-31 19:42:31,791 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 19:42:31,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=420, Invalid=1560, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:42:31,792 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 94 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:31,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 73 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:42:31,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 19:42:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2022-01-31 19:42:31,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.041025641025641) internal successors, (203), 195 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 207 transitions. [2022-01-31 19:42:31,918 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 207 transitions. Word has length 142 [2022-01-31 19:42:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:31,918 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 207 transitions. [2022-01-31 19:42:31,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 19:42:31,918 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 207 transitions. [2022-01-31 19:42:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:42:31,919 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:31,919 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:31,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:42:31,919 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:31,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:31,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1974240138, now seen corresponding path program 35 times [2022-01-31 19:42:31,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:31,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184420350] [2022-01-31 19:42:31,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:31,921 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:31,921 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:31,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:31,922 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:31,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:32,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:32,191 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 19:42:32,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184420350] [2022-01-31 19:42:32,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [184420350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:32,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:32,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:42:32,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277794452] [2022-01-31 19:42:32,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:32,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:42:32,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:32,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:42:32,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:42:32,192 INFO L87 Difference]: Start difference. First operand 200 states and 207 transitions. Second operand has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 19:42:32,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:32,786 INFO L93 Difference]: Finished difference Result 265 states and 277 transitions. [2022-01-31 19:42:32,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:42:32,787 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 144 [2022-01-31 19:42:32,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:32,787 INFO L225 Difference]: With dead ends: 265 [2022-01-31 19:42:32,787 INFO L226 Difference]: Without dead ends: 151 [2022-01-31 19:42:32,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=598, Invalid=1382, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:42:32,788 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 416 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 353 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 416 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:32,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [416 Valid, 65 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [353 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:42:32,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-01-31 19:42:32,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-01-31 19:42:32,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 146 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:32,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2022-01-31 19:42:32,895 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 144 [2022-01-31 19:42:32,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:32,896 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2022-01-31 19:42:32,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.4) internal successors, (72), 29 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 19:42:32,896 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2022-01-31 19:42:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:42:32,896 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:32,896 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:32,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:42:32,896 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:32,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:32,897 INFO L85 PathProgramCache]: Analyzing trace with hash 1533360848, now seen corresponding path program 36 times [2022-01-31 19:42:32,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:32,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [206595101] [2022-01-31 19:42:32,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:32,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:32,898 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:32,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:32,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:46,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:46,110 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 19:42:46,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:46,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [206595101] [2022-01-31 19:42:46,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [206595101] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:46,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:46,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 19:42:46,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711440809] [2022-01-31 19:42:46,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:46,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 19:42:46,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:46,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 19:42:46,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1288, Invalid=14968, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 19:42:46,112 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand has 128 states, 128 states have (on average 1.140625) internal successors, (146), 126 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:58,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:58,084 INFO L93 Difference]: Finished difference Result 244 states and 251 transitions. [2022-01-31 19:42:58,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 19:42:58,084 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.140625) internal successors, (146), 126 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2022-01-31 19:42:58,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:58,085 INFO L225 Difference]: With dead ends: 244 [2022-01-31 19:42:58,085 INFO L226 Difference]: Without dead ends: 239 [2022-01-31 19:42:58,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8223 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1796, Invalid=26934, Unknown=0, NotChecked=0, Total=28730 [2022-01-31 19:42:58,086 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 7318 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 7564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 7318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:58,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 478 Invalid, 7564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [246 Valid, 7318 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-01-31 19:42:58,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-01-31 19:42:58,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 212. [2022-01-31 19:42:58,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.038647342995169) internal successors, (215), 207 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:58,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 219 transitions. [2022-01-31 19:42:58,247 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 219 transitions. Word has length 150 [2022-01-31 19:42:58,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:58,248 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 219 transitions. [2022-01-31 19:42:58,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.140625) internal successors, (146), 126 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 219 transitions. [2022-01-31 19:42:58,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:42:58,248 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:58,249 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:58,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:42:58,249 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:58,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:58,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1373721746, now seen corresponding path program 37 times [2022-01-31 19:42:58,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:58,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373093524] [2022-01-31 19:42:58,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:58,250 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:58,250 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:58,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:58,251 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:58,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:58,554 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 19:42:58,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:58,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373093524] [2022-01-31 19:42:58,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1373093524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:58,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:58,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:42:58,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737729713] [2022-01-31 19:42:58,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:58,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:42:58,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:58,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:42:58,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:42:58,555 INFO L87 Difference]: Start difference. First operand 212 states and 219 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 19:42:59,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:42:59,449 INFO L93 Difference]: Finished difference Result 418 states and 432 transitions. [2022-01-31 19:42:59,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:42:59,450 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 152 [2022-01-31 19:42:59,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:42:59,450 INFO L225 Difference]: With dead ends: 418 [2022-01-31 19:42:59,450 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 19:42:59,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=479, Invalid=1777, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:42:59,451 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 95 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:42:59,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 77 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:42:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 19:42:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-01-31 19:42:59,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0382775119617225) internal successors, (217), 209 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:42:59,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 221 transitions. [2022-01-31 19:42:59,609 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 221 transitions. Word has length 152 [2022-01-31 19:42:59,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:42:59,610 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 221 transitions. [2022-01-31 19:42:59,610 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 19:42:59,610 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 221 transitions. [2022-01-31 19:42:59,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:42:59,610 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:42:59,610 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:42:59,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:42:59,611 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:42:59,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:42:59,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1665250036, now seen corresponding path program 38 times [2022-01-31 19:42:59,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:42:59,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919338511] [2022-01-31 19:42:59,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:42:59,613 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:42:59,613 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:42:59,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:42:59,614 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:42:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:59,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:42:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:42:59,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:42:59,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:42:59,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919338511] [2022-01-31 19:42:59,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919338511] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:42:59,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:42:59,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:42:59,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614457817] [2022-01-31 19:42:59,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:42:59,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:42:59,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:42:59,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:42:59,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=761, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:42:59,926 INFO L87 Difference]: Start difference. First operand 214 states and 221 transitions. Second operand has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 19:43:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:00,514 INFO L93 Difference]: Finished difference Result 283 states and 295 transitions. [2022-01-31 19:43:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:43:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 154 [2022-01-31 19:43:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:00,515 INFO L225 Difference]: With dead ends: 283 [2022-01-31 19:43:00,515 INFO L226 Difference]: Without dead ends: 161 [2022-01-31 19:43:00,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=685, Invalid=1571, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:43:00,515 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 377 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:00,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 59 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:43:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-01-31 19:43:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-01-31 19:43:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-01-31 19:43:00,630 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 154 [2022-01-31 19:43:00,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:00,631 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-01-31 19:43:00,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.375) internal successors, (76), 31 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 19:43:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-01-31 19:43:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 19:43:00,631 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:00,631 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:00,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:43:00,632 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:00,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1432268058, now seen corresponding path program 39 times [2022-01-31 19:43:00,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:00,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097676280] [2022-01-31 19:43:00,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:00,633 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:00,633 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:00,633 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:00,634 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:18,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:18,838 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 19:43:18,838 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:18,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2097676280] [2022-01-31 19:43:18,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2097676280] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:18,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:18,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 19:43:18,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166529545] [2022-01-31 19:43:18,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:18,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 19:43:18,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:18,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 19:43:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1602, Invalid=17030, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 19:43:18,840 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 137 states, 137 states have (on average 1.1386861313868613) internal successors, (156), 135 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:39,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:39,681 INFO L93 Difference]: Finished difference Result 261 states and 268 transitions. [2022-01-31 19:43:39,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-01-31 19:43:39,681 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.1386861313868613) internal successors, (156), 135 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-01-31 19:43:39,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:39,682 INFO L225 Difference]: With dead ends: 261 [2022-01-31 19:43:39,682 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 19:43:39,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 11 SyntacticMatches, 5 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11798 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=5020, Invalid=46282, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 19:43:39,684 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 7866 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 8270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 7866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:39,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 437 Invalid, 8270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 7866 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-01-31 19:43:39,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 19:43:39,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 226. [2022-01-31 19:43:39,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.0361990950226245) internal successors, (229), 221 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:39,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 233 transitions. [2022-01-31 19:43:39,881 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 233 transitions. Word has length 160 [2022-01-31 19:43:39,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:39,881 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 233 transitions. [2022-01-31 19:43:39,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.1386861313868613) internal successors, (156), 135 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:39,882 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 233 transitions. [2022-01-31 19:43:39,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:43:39,882 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:39,882 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:39,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:43:39,882 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:39,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:39,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1966610940, now seen corresponding path program 40 times [2022-01-31 19:43:39,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:39,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098108734] [2022-01-31 19:43:39,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:39,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:39,884 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:39,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:39,885 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:39,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:40,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:40,220 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 19:43:40,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:40,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098108734] [2022-01-31 19:43:40,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098108734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:40,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:40,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:43:40,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044359176] [2022-01-31 19:43:40,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:40,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:43:40,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:43:40,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:43:40,222 INFO L87 Difference]: Start difference. First operand 226 states and 233 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 19:43:41,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:41,318 INFO L93 Difference]: Finished difference Result 446 states and 460 transitions. [2022-01-31 19:43:41,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:43:41,318 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 162 [2022-01-31 19:43:41,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:41,335 INFO L225 Difference]: With dead ends: 446 [2022-01-31 19:43:41,335 INFO L226 Difference]: Without dead ends: 229 [2022-01-31 19:43:41,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=542, Invalid=2008, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:43:41,336 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:41,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 128 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:43:41,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-01-31 19:43:41,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-01-31 19:43:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0358744394618835) internal successors, (231), 223 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 19:43:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 235 transitions. [2022-01-31 19:43:41,523 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 235 transitions. Word has length 162 [2022-01-31 19:43:41,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:41,523 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 235 transitions. [2022-01-31 19:43:41,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 19:43:41,523 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 235 transitions. [2022-01-31 19:43:41,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:43:41,524 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:41,524 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:41,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:43:41,524 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:41,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1204250078, now seen corresponding path program 41 times [2022-01-31 19:43:41,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:41,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570911424] [2022-01-31 19:43:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:41,526 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:41,526 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:41,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:41,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:41,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:43:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:43:41,876 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 19:43:41,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:43:41,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570911424] [2022-01-31 19:43:41,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [570911424] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:43:41,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:43:41,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:43:41,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335473096] [2022-01-31 19:43:41,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:43:41,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:43:41,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:43:41,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:43:41,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=860, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:43:41,877 INFO L87 Difference]: Start difference. First operand 228 states and 235 transitions. Second operand has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 19:43:42,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:43:42,500 INFO L93 Difference]: Finished difference Result 301 states and 313 transitions. [2022-01-31 19:43:42,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:43:42,500 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 164 [2022-01-31 19:43:42,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:43:42,501 INFO L225 Difference]: With dead ends: 301 [2022-01-31 19:43:42,501 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:43:42,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=778, Invalid=1772, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:43:42,502 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 372 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:43:42,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 47 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:43:42,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:43:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-01-31 19:43:42,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0301204819277108) internal successors, (171), 166 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:43:42,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-01-31 19:43:42,639 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 164 [2022-01-31 19:43:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:43:42,639 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-01-31 19:43:42,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.3529411764705883) internal successors, (80), 33 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 19:43:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-01-31 19:43:42,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:43:42,640 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:43:42,640 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:43:42,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:43:42,640 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:43:42,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:43:42,640 INFO L85 PathProgramCache]: Analyzing trace with hash 976848764, now seen corresponding path program 42 times [2022-01-31 19:43:42,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:43:42,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100430820] [2022-01-31 19:43:42,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:43:42,642 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:43:42,642 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:43:42,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:43:42,643 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:43:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:01,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:01,341 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 19:44:01,341 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:01,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100430820] [2022-01-31 19:44:01,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [100430820] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:01,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:01,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-01-31 19:44:01,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642894127] [2022-01-31 19:44:01,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:01,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-01-31 19:44:01,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-01-31 19:44:01,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1660, Invalid=19510, Unknown=0, NotChecked=0, Total=21170 [2022-01-31 19:44:01,344 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 146 states, 146 states have (on average 1.1369863013698631) internal successors, (166), 144 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:23,097 INFO L93 Difference]: Finished difference Result 276 states and 283 transitions. [2022-01-31 19:44:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-01-31 19:44:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.1369863013698631) internal successors, (166), 144 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-01-31 19:44:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:23,098 INFO L225 Difference]: With dead ends: 276 [2022-01-31 19:44:23,099 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 19:44:23,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12687 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=3917, Invalid=42523, Unknown=0, NotChecked=0, Total=46440 [2022-01-31 19:44:23,101 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 9764 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 10173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 9764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:23,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 567 Invalid, 10173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 9764 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-01-31 19:44:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 19:44:23,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 240. [2022-01-31 19:44:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0340425531914894) internal successors, (243), 235 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 247 transitions. [2022-01-31 19:44:23,337 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 247 transitions. Word has length 170 [2022-01-31 19:44:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:23,338 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 247 transitions. [2022-01-31 19:44:23,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.1369863013698631) internal successors, (166), 144 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:23,338 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 247 transitions. [2022-01-31 19:44:23,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:44:23,338 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:23,339 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:23,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:44:23,339 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:23,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:23,339 INFO L85 PathProgramCache]: Analyzing trace with hash -976478950, now seen corresponding path program 43 times [2022-01-31 19:44:23,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:23,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477302097] [2022-01-31 19:44:23,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:23,340 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:23,340 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:23,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:23,341 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:23,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:23,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:23,719 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 19:44:23,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:23,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477302097] [2022-01-31 19:44:23,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477302097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:23,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:23,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:44:23,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621516949] [2022-01-31 19:44:23,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:23,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:44:23,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:23,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:44:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:44:23,721 INFO L87 Difference]: Start difference. First operand 240 states and 247 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:24,790 INFO L93 Difference]: Finished difference Result 474 states and 488 transitions. [2022-01-31 19:44:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:44:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-01-31 19:44:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:24,792 INFO L225 Difference]: With dead ends: 474 [2022-01-31 19:44:24,792 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 19:44:24,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=609, Invalid=2253, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:44:24,792 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 102 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:24,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 80 Invalid, 1143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:44:24,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 19:44:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 242. [2022-01-31 19:44:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.0337552742616034) internal successors, (245), 237 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 249 transitions. [2022-01-31 19:44:25,043 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 249 transitions. Word has length 172 [2022-01-31 19:44:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:25,043 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 249 transitions. [2022-01-31 19:44:25,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 249 transitions. [2022-01-31 19:44:25,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:44:25,044 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:25,044 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:25,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:44:25,044 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:25,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:25,045 INFO L85 PathProgramCache]: Analyzing trace with hash 666420152, now seen corresponding path program 44 times [2022-01-31 19:44:25,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:25,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872179346] [2022-01-31 19:44:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:25,046 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:25,046 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:25,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:25,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:25,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:25,434 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 19:44:25,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:25,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872179346] [2022-01-31 19:44:25,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [872179346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:25,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:44:25,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981610962] [2022-01-31 19:44:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:25,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:44:25,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:44:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=965, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:44:25,435 INFO L87 Difference]: Start difference. First operand 242 states and 249 transitions. Second operand has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:26,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:44:26,151 INFO L93 Difference]: Finished difference Result 319 states and 331 transitions. [2022-01-31 19:44:26,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:44:26,152 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-01-31 19:44:26,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:44:26,152 INFO L225 Difference]: With dead ends: 319 [2022-01-31 19:44:26,152 INFO L226 Difference]: Without dead ends: 181 [2022-01-31 19:44:26,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=877, Invalid=1985, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:44:26,153 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 456 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:44:26,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 77 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:44:26,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-31 19:44:26,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-01-31 19:44:26,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0284090909090908) internal successors, (181), 176 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2022-01-31 19:44:26,333 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 174 [2022-01-31 19:44:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:44:26,334 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2022-01-31 19:44:26,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:44:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2022-01-31 19:44:26,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 19:44:26,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:44:26,334 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:44:26,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:44:26,335 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:44:26,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:44:26,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1512294254, now seen corresponding path program 45 times [2022-01-31 19:44:26,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:44:26,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [831421952] [2022-01-31 19:44:26,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:44:26,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:44:26,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:44:26,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:44:26,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:44:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:44:48,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:44:48,096 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 19:44:48,096 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:44:48,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [831421952] [2022-01-31 19:44:48,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [831421952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:44:48,096 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:44:48,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-01-31 19:44:48,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659978359] [2022-01-31 19:44:48,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:44:48,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-01-31 19:44:48,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:44:48,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-01-31 19:44:48,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1915, Invalid=22265, Unknown=0, NotChecked=0, Total=24180 [2022-01-31 19:44:48,099 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand has 156 states, 156 states have (on average 1.1282051282051282) internal successors, (176), 154 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:08,846 INFO L93 Difference]: Finished difference Result 292 states and 299 transitions. [2022-01-31 19:45:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-01-31 19:45:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.1282051282051282) internal successors, (176), 154 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-01-31 19:45:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:08,848 INFO L225 Difference]: With dead ends: 292 [2022-01-31 19:45:08,848 INFO L226 Difference]: Without dead ends: 287 [2022-01-31 19:45:08,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15497 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=3370, Invalid=48386, Unknown=0, NotChecked=0, Total=51756 [2022-01-31 19:45:08,850 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 498 mSDsCounter, 0 mSdLazyCounter, 9853 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 10245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 9853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:08,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 514 Invalid, 10245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 9853 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-01-31 19:45:08,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-01-31 19:45:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 254. [2022-01-31 19:45:09,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.0321285140562249) internal successors, (257), 249 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:09,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 261 transitions. [2022-01-31 19:45:09,148 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 261 transitions. Word has length 180 [2022-01-31 19:45:09,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:09,148 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 261 transitions. [2022-01-31 19:45:09,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.1282051282051282) internal successors, (176), 154 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:09,149 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 261 transitions. [2022-01-31 19:45:09,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 19:45:09,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:09,149 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:09,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:45:09,149 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:09,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1346260816, now seen corresponding path program 46 times [2022-01-31 19:45:09,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:09,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1044209682] [2022-01-31 19:45:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:09,151 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:09,151 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:09,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:09,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:09,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:09,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:09,520 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 19:45:09,520 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:09,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1044209682] [2022-01-31 19:45:09,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1044209682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:09,520 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:09,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:45:09,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935758872] [2022-01-31 19:45:09,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:09,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:45:09,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:45:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:45:09,521 INFO L87 Difference]: Start difference. First operand 254 states and 261 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:10,659 INFO L93 Difference]: Finished difference Result 502 states and 516 transitions. [2022-01-31 19:45:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:45:10,659 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-01-31 19:45:10,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:10,660 INFO L225 Difference]: With dead ends: 502 [2022-01-31 19:45:10,660 INFO L226 Difference]: Without dead ends: 257 [2022-01-31 19:45:10,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=680, Invalid=2512, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:45:10,661 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 113 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:10,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 83 Invalid, 1261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:45:10,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-01-31 19:45:10,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-01-31 19:45:10,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0318725099601593) internal successors, (259), 251 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:10,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 263 transitions. [2022-01-31 19:45:10,932 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 263 transitions. Word has length 182 [2022-01-31 19:45:10,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:10,932 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 263 transitions. [2022-01-31 19:45:10,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:10,932 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 263 transitions. [2022-01-31 19:45:10,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 19:45:10,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:10,933 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:10,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:45:10,933 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:10,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:10,934 INFO L85 PathProgramCache]: Analyzing trace with hash -876795442, now seen corresponding path program 47 times [2022-01-31 19:45:10,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:10,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870513319] [2022-01-31 19:45:10,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:10,935 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:10,935 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:10,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:10,936 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:11,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:11,326 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 19:45:11,327 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:11,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870513319] [2022-01-31 19:45:11,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870513319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:11,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:11,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:45:11,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222094254] [2022-01-31 19:45:11,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:11,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:45:11,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:11,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:45:11,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=1076, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:45:11,328 INFO L87 Difference]: Start difference. First operand 256 states and 263 transitions. Second operand has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:12,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:12,136 INFO L93 Difference]: Finished difference Result 337 states and 349 transitions. [2022-01-31 19:45:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 19:45:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-01-31 19:45:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:12,137 INFO L225 Difference]: With dead ends: 337 [2022-01-31 19:45:12,137 INFO L226 Difference]: Without dead ends: 191 [2022-01-31 19:45:12,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=982, Invalid=2210, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:45:12,138 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 380 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:12,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [380 Valid, 87 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:45:12,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-01-31 19:45:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-01-31 19:45:12,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 195 transitions. [2022-01-31 19:45:12,343 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 195 transitions. Word has length 184 [2022-01-31 19:45:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:12,343 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 195 transitions. [2022-01-31 19:45:12,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:12,343 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 195 transitions. [2022-01-31 19:45:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 19:45:12,344 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:12,344 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:12,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:45:12,346 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:12,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1732262360, now seen corresponding path program 48 times [2022-01-31 19:45:12,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:12,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715202718] [2022-01-31 19:45:12,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:12,347 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:12,347 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:12,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:12,349 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:12,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:36,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:36,116 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 19:45:36,116 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:36,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715202718] [2022-01-31 19:45:36,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [715202718] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:36,117 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:36,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-01-31 19:45:36,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943586938] [2022-01-31 19:45:36,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:36,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-01-31 19:45:36,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:36,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-01-31 19:45:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2084, Invalid=24648, Unknown=0, NotChecked=0, Total=26732 [2022-01-31 19:45:36,119 INFO L87 Difference]: Start difference. First operand 191 states and 195 transitions. Second operand has 164 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 162 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:58,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:45:58,630 INFO L93 Difference]: Finished difference Result 308 states and 315 transitions. [2022-01-31 19:45:58,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-01-31 19:45:58,630 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 162 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-01-31 19:45:58,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:45:58,631 INFO L225 Difference]: With dead ends: 308 [2022-01-31 19:45:58,631 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 19:45:58,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13267 ImplicationChecksByTransitivity, 32.0s TimeCoverageRelationStatistics Valid=2720, Invalid=42862, Unknown=0, NotChecked=0, Total=45582 [2022-01-31 19:45:58,633 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 11390 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 586 SdHoareTripleChecker+Invalid, 11763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 11390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:45:58,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 586 Invalid, 11763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 11390 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-01-31 19:45:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 19:45:58,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 268. [2022-01-31 19:45:58,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0304182509505704) internal successors, (271), 263 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 19:45:58,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 275 transitions. [2022-01-31 19:45:58,987 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 275 transitions. Word has length 190 [2022-01-31 19:45:58,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:45:58,987 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 275 transitions. [2022-01-31 19:45:58,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.1341463414634145) internal successors, (186), 162 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:45:58,987 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 275 transitions. [2022-01-31 19:45:58,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 19:45:58,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:45:58,988 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:45:58,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:45:58,988 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:45:58,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:45:58,988 INFO L85 PathProgramCache]: Analyzing trace with hash 650576070, now seen corresponding path program 49 times [2022-01-31 19:45:58,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:45:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599768375] [2022-01-31 19:45:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:45:58,990 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:45:58,990 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:45:58,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:45:58,991 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:45:59,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:59,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:45:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:45:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:45:59,457 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:45:59,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599768375] [2022-01-31 19:45:59,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [599768375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:45:59,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:45:59,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:45:59,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224046170] [2022-01-31 19:45:59,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:45:59,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:45:59,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:45:59,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:45:59,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:45:59,458 INFO L87 Difference]: Start difference. First operand 268 states and 275 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:00,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:00,810 INFO L93 Difference]: Finished difference Result 530 states and 544 transitions. [2022-01-31 19:46:00,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:46:00,811 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2022-01-31 19:46:00,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:00,812 INFO L225 Difference]: With dead ends: 530 [2022-01-31 19:46:00,812 INFO L226 Difference]: Without dead ends: 271 [2022-01-31 19:46:00,812 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=755, Invalid=2785, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:46:00,813 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 105 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1342 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:00,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 83 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1342 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:46:00,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-01-31 19:46:01,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2022-01-31 19:46:01,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.030188679245283) internal successors, (273), 265 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 19:46:01,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 277 transitions. [2022-01-31 19:46:01,187 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 277 transitions. Word has length 192 [2022-01-31 19:46:01,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:01,187 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 277 transitions. [2022-01-31 19:46:01,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:01,187 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 277 transitions. [2022-01-31 19:46:01,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 19:46:01,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:01,188 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:01,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:46:01,188 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:01,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:01,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1347169380, now seen corresponding path program 50 times [2022-01-31 19:46:01,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:01,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365675095] [2022-01-31 19:46:01,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:01,189 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:01,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:01,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:01,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:01,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:01,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:01,636 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 19:46:01,636 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365675095] [2022-01-31 19:46:01,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365675095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:01,636 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:01,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:46:01,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180247770] [2022-01-31 19:46:01,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:01,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:46:01,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:01,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:46:01,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1193, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:46:01,637 INFO L87 Difference]: Start difference. First operand 270 states and 277 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:02,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:46:02,515 INFO L93 Difference]: Finished difference Result 355 states and 367 transitions. [2022-01-31 19:46:02,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:46:02,516 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-01-31 19:46:02,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:46:02,516 INFO L225 Difference]: With dead ends: 355 [2022-01-31 19:46:02,516 INFO L226 Difference]: Without dead ends: 201 [2022-01-31 19:46:02,517 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1093, Invalid=2447, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 19:46:02,517 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 532 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 532 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:46:02,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [532 Valid, 67 Invalid, 1060 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:46:02,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-01-31 19:46:02,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-01-31 19:46:02,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0255102040816326) internal successors, (201), 196 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-01-31 19:46:02,751 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 194 [2022-01-31 19:46:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:46:02,752 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-01-31 19:46:02,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:46:02,752 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-01-31 19:46:02,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 19:46:02,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:46:02,752 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:46:02,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:46:02,753 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:46:02,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:46:02,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2086498242, now seen corresponding path program 51 times [2022-01-31 19:46:02,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:46:02,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932475351] [2022-01-31 19:46:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:46:02,754 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:46:02,754 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:46:02,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:46:02,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:46:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:46:32,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:46:32,419 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 19:46:32,419 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:46:32,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932475351] [2022-01-31 19:46:32,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [932475351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:46:32,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:46:32,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2022-01-31 19:46:32,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677484087] [2022-01-31 19:46:32,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:46:32,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-01-31 19:46:32,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:46:32,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-01-31 19:46:32,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2629, Invalid=27473, Unknown=0, NotChecked=0, Total=30102 [2022-01-31 19:46:32,421 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 174 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 172 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:07,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:07,996 INFO L93 Difference]: Finished difference Result 325 states and 332 transitions. [2022-01-31 19:47:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-01-31 19:47:07,996 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 172 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-01-31 19:47:07,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:07,997 INFO L225 Difference]: With dead ends: 325 [2022-01-31 19:47:07,997 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 19:47:08,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18294 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=5749, Invalid=58513, Unknown=0, NotChecked=0, Total=64262 [2022-01-31 19:47:08,000 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 32 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 11742 mSolverCounterSat, 569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 12311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 569 IncrementalHoareTripleChecker+Valid, 11742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:08,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 550 Invalid, 12311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [569 Valid, 11742 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-01-31 19:47:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 19:47:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 282. [2022-01-31 19:47:08,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 277 states have (on average 1.0288808664259927) internal successors, (285), 277 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:08,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 289 transitions. [2022-01-31 19:47:08,392 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 289 transitions. Word has length 200 [2022-01-31 19:47:08,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:08,393 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 289 transitions. [2022-01-31 19:47:08,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.1264367816091954) internal successors, (196), 172 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:08,393 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 289 transitions. [2022-01-31 19:47:08,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 19:47:08,394 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:08,394 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:08,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:47:08,394 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -863867556, now seen corresponding path program 52 times [2022-01-31 19:47:08,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:08,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477205119] [2022-01-31 19:47:08,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:08,395 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:08,396 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:08,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:08,397 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:08,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:08,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:47:08,863 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:08,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477205119] [2022-01-31 19:47:08,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [477205119] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:08,863 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:08,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:47:08,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684809357] [2022-01-31 19:47:08,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:08,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:47:08,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:08,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:47:08,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1316, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:47:08,864 INFO L87 Difference]: Start difference. First operand 282 states and 289 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:10,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:10,366 INFO L93 Difference]: Finished difference Result 558 states and 572 transitions. [2022-01-31 19:47:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:47:10,366 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-01-31 19:47:10,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:10,367 INFO L225 Difference]: With dead ends: 558 [2022-01-31 19:47:10,367 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 19:47:10,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:47:10,376 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 118 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:10,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 97 Invalid, 1597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:47:10,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 19:47:10,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 284. [2022-01-31 19:47:10,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.028673835125448) internal successors, (287), 279 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:10,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 291 transitions. [2022-01-31 19:47:10,759 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 291 transitions. Word has length 202 [2022-01-31 19:47:10,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:10,760 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 291 transitions. [2022-01-31 19:47:10,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:10,760 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 291 transitions. [2022-01-31 19:47:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 19:47:10,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:10,760 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:10,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:47:10,761 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:10,761 INFO L85 PathProgramCache]: Analyzing trace with hash -487314566, now seen corresponding path program 53 times [2022-01-31 19:47:10,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:10,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331145914] [2022-01-31 19:47:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:10,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:10,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:10,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:10,763 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:11,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:11,226 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 19:47:11,226 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:11,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331145914] [2022-01-31 19:47:11,226 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1331145914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:11,227 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:11,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 19:47:11,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375079332] [2022-01-31 19:47:11,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:11,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 19:47:11,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:11,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 19:47:11,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=1316, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:47:11,228 INFO L87 Difference]: Start difference. First operand 284 states and 291 transitions. Second operand has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:12,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:47:12,229 INFO L93 Difference]: Finished difference Result 373 states and 385 transitions. [2022-01-31 19:47:12,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:47:12,230 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-01-31 19:47:12,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:47:12,231 INFO L225 Difference]: With dead ends: 373 [2022-01-31 19:47:12,231 INFO L226 Difference]: Without dead ends: 211 [2022-01-31 19:47:12,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:47:12,231 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 822 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 721 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 822 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 721 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:47:12,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [822 Valid, 79 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [721 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:47:12,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-01-31 19:47:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-01-31 19:47:12,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0242718446601942) internal successors, (211), 206 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 215 transitions. [2022-01-31 19:47:12,513 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 215 transitions. Word has length 204 [2022-01-31 19:47:12,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:47:12,513 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 215 transitions. [2022-01-31 19:47:12,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.2857142857142856) internal successors, (96), 41 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:47:12,513 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 215 transitions. [2022-01-31 19:47:12,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 19:47:12,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:47:12,514 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:47:12,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:47:12,514 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:47:12,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:47:12,514 INFO L85 PathProgramCache]: Analyzing trace with hash -758450476, now seen corresponding path program 54 times [2022-01-31 19:47:12,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:47:12,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350330232] [2022-01-31 19:47:12,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:47:12,516 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:47:12,516 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:47:12,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:47:12,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:47:12,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:50,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:47:50,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:47:50,248 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 19:47:50,248 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:47:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350330232] [2022-01-31 19:47:50,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350330232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:47:50,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:47:50,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-01-31 19:47:50,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412590996] [2022-01-31 19:47:50,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:47:50,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-01-31 19:47:50,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:47:50,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-01-31 19:47:50,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1998, Invalid=30944, Unknown=0, NotChecked=0, Total=32942 [2022-01-31 19:47:50,252 INFO L87 Difference]: Start difference. First operand 211 states and 215 transitions. Second operand has 182 states, 182 states have (on average 1.1318681318681318) internal successors, (206), 180 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:40,839 INFO L93 Difference]: Finished difference Result 339 states and 346 transitions. [2022-01-31 19:48:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-01-31 19:48:40,839 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.1318681318681318) internal successors, (206), 180 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-01-31 19:48:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:40,840 INFO L225 Difference]: With dead ends: 339 [2022-01-31 19:48:40,840 INFO L226 Difference]: Without dead ends: 334 [2022-01-31 19:48:40,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 15 SyntacticMatches, 4 SemanticMatches, 312 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21667 ImplicationChecksByTransitivity, 67.1s TimeCoverageRelationStatistics Valid=8131, Invalid=90151, Unknown=0, NotChecked=0, Total=98282 [2022-01-31 19:48:40,844 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 13060 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 13676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 13060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:40,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 560 Invalid, 13676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 13060 Invalid, 0 Unknown, 0 Unchecked, 10.5s Time] [2022-01-31 19:48:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-01-31 19:48:41,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 296. [2022-01-31 19:48:41,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.0274914089347078) internal successors, (299), 291 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:41,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 303 transitions. [2022-01-31 19:48:41,308 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 303 transitions. Word has length 210 [2022-01-31 19:48:41,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:41,308 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 303 transitions. [2022-01-31 19:48:41,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.1318681318681318) internal successors, (206), 180 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:41,309 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 303 transitions. [2022-01-31 19:48:41,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 19:48:41,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:41,309 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:41,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:48:41,309 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:41,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1138600334, now seen corresponding path program 55 times [2022-01-31 19:48:41,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:41,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622615681] [2022-01-31 19:48:41,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:41,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:41,311 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:41,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:41,312 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:41,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:41,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:41,808 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 19:48:41,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:41,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622615681] [2022-01-31 19:48:41,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [622615681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:41,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:41,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:48:41,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914426965] [2022-01-31 19:48:41,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:41,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:48:41,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:48:41,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1445, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:48:41,810 INFO L87 Difference]: Start difference. First operand 296 states and 303 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:43,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:43,405 INFO L93 Difference]: Finished difference Result 586 states and 600 transitions. [2022-01-31 19:48:43,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:48:43,405 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-01-31 19:48:43,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:43,406 INFO L225 Difference]: With dead ends: 586 [2022-01-31 19:48:43,406 INFO L226 Difference]: Without dead ends: 299 [2022-01-31 19:48:43,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=917, Invalid=3373, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:48:43,407 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 115 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:43,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 80 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1459 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:48:43,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-01-31 19:48:43,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 298. [2022-01-31 19:48:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 293 states have (on average 1.0273037542662116) internal successors, (301), 293 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 305 transitions. [2022-01-31 19:48:43,862 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 305 transitions. Word has length 212 [2022-01-31 19:48:43,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:43,862 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 305 transitions. [2022-01-31 19:48:43,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:43,863 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 305 transitions. [2022-01-31 19:48:43,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 19:48:43,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:43,863 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:43,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:48:43,863 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:43,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:43,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1758168848, now seen corresponding path program 56 times [2022-01-31 19:48:43,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:43,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087771840] [2022-01-31 19:48:43,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:43,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:43,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:43,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:43,866 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:44,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:48:44,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:48:44,372 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 19:48:44,372 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:48:44,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087771840] [2022-01-31 19:48:44,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087771840] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:48:44,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:48:44,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 19:48:44,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770825655] [2022-01-31 19:48:44,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:48:44,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 19:48:44,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:48:44,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 19:48:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=1445, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:48:44,374 INFO L87 Difference]: Start difference. First operand 298 states and 305 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:45,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:48:45,372 INFO L93 Difference]: Finished difference Result 391 states and 403 transitions. [2022-01-31 19:48:45,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:48:45,373 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-01-31 19:48:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:48:45,374 INFO L225 Difference]: With dead ends: 391 [2022-01-31 19:48:45,374 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 19:48:45,374 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1333, Invalid=2957, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 19:48:45,375 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 701 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 628 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 701 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 1248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 628 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:48:45,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [701 Valid, 61 Invalid, 1248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [628 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:48:45,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 19:48:45,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-01-31 19:48:45,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0231481481481481) internal successors, (221), 216 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:45,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2022-01-31 19:48:45,705 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 214 [2022-01-31 19:48:45,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:48:45,705 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2022-01-31 19:48:45,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 43 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:48:45,705 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2022-01-31 19:48:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 19:48:45,706 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:48:45,706 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:48:45,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:48:45,706 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:48:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:48:45,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1543022102, now seen corresponding path program 57 times [2022-01-31 19:48:45,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:48:45,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594512679] [2022-01-31 19:48:45,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:48:45,708 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:48:45,708 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:48:45,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:48:45,709 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:48:46,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:25,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:25,526 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 19:49:25,526 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:25,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594512679] [2022-01-31 19:49:25,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [594512679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:25,527 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:25,527 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [] total 192 [2022-01-31 19:49:25,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553865372] [2022-01-31 19:49:25,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:25,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-01-31 19:49:25,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:25,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-01-31 19:49:25,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2810, Invalid=33862, Unknown=0, NotChecked=0, Total=36672 [2022-01-31 19:49:25,529 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 192 states, 192 states have (on average 1.125) internal successors, (216), 190 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:57,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:57,142 INFO L93 Difference]: Finished difference Result 356 states and 363 transitions. [2022-01-31 19:49:57,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-01-31 19:49:57,142 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.125) internal successors, (216), 190 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2022-01-31 19:49:57,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:57,144 INFO L225 Difference]: With dead ends: 356 [2022-01-31 19:49:57,144 INFO L226 Difference]: Without dead ends: 351 [2022-01-31 19:49:57,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17579 ImplicationChecksByTransitivity, 46.5s TimeCoverageRelationStatistics Valid=3441, Invalid=56339, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 19:49:57,146 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 15990 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 703 SdHoareTripleChecker+Invalid, 16404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 15990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:57,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 703 Invalid, 16404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 15990 Invalid, 0 Unknown, 0 Unchecked, 12.2s Time] [2022-01-31 19:49:57,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-31 19:49:57,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 310. [2022-01-31 19:49:57,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.0262295081967212) internal successors, (313), 305 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:57,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 317 transitions. [2022-01-31 19:49:57,665 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 317 transitions. Word has length 220 [2022-01-31 19:49:57,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:49:57,665 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 317 transitions. [2022-01-31 19:49:57,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.125) internal successors, (216), 190 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 317 transitions. [2022-01-31 19:49:57,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 19:49:57,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:49:57,666 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:49:57,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:49:57,666 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:49:57,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:49:57,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1067639800, now seen corresponding path program 58 times [2022-01-31 19:49:57,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:49:57,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880155682] [2022-01-31 19:49:57,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:49:57,668 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:49:57,668 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:49:57,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:49:57,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:49:57,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:58,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:49:58,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:49:58,208 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 19:49:58,208 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:49:58,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880155682] [2022-01-31 19:49:58,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880155682] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:49:58,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:49:58,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:49:58,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356171542] [2022-01-31 19:49:58,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:49:58,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:49:58,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:49:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:49:58,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:49:58,210 INFO L87 Difference]: Start difference. First operand 310 states and 317 transitions. Second operand has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:49:59,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:49:59,981 INFO L93 Difference]: Finished difference Result 614 states and 628 transitions. [2022-01-31 19:49:59,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:49:59,982 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-01-31 19:49:59,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:49:59,983 INFO L225 Difference]: With dead ends: 614 [2022-01-31 19:49:59,983 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 19:49:59,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1004, Invalid=3688, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:49:59,983 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 126 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:49:59,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 90 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:49:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 19:50:00,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 312. [2022-01-31 19:50:00,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 307 states have (on average 1.0260586319218241) internal successors, (315), 307 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 319 transitions. [2022-01-31 19:50:00,491 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 319 transitions. Word has length 222 [2022-01-31 19:50:00,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:00,491 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 319 transitions. [2022-01-31 19:50:00,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:00,492 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 319 transitions. [2022-01-31 19:50:00,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 19:50:00,492 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:00,492 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:00,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:50:00,492 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:00,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:00,493 INFO L85 PathProgramCache]: Analyzing trace with hash 879796006, now seen corresponding path program 59 times [2022-01-31 19:50:00,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:00,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [923556955] [2022-01-31 19:50:00,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:00,494 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:00,494 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:00,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:00,496 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:01,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:01,053 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 19:50:01,053 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:01,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [923556955] [2022-01-31 19:50:01,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [923556955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:01,053 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:01,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 19:50:01,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963184621] [2022-01-31 19:50:01,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:01,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 19:50:01,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:01,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 19:50:01,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 19:50:01,054 INFO L87 Difference]: Start difference. First operand 312 states and 319 transitions. Second operand has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:02,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:50:02,270 INFO L93 Difference]: Finished difference Result 409 states and 421 transitions. [2022-01-31 19:50:02,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:50:02,270 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-01-31 19:50:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:50:02,271 INFO L225 Difference]: With dead ends: 409 [2022-01-31 19:50:02,271 INFO L226 Difference]: Without dead ends: 231 [2022-01-31 19:50:02,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1462, Invalid=3230, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:50:02,272 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 725 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 646 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 646 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:50:02,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 55 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [646 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:50:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-01-31 19:50:02,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-01-31 19:50:02,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0221238938053097) internal successors, (231), 226 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 19:50:02,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 235 transitions. [2022-01-31 19:50:02,645 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 235 transitions. Word has length 224 [2022-01-31 19:50:02,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:50:02,645 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 235 transitions. [2022-01-31 19:50:02,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.260869565217391) internal successors, (104), 45 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:50:02,646 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 235 transitions. [2022-01-31 19:50:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 19:50:02,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:50:02,646 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:50:02,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:50:02,646 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:50:02,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:50:02,647 INFO L85 PathProgramCache]: Analyzing trace with hash -55699072, now seen corresponding path program 60 times [2022-01-31 19:50:02,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:50:02,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746424772] [2022-01-31 19:50:02,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:50:02,648 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:50:02,648 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:50:02,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:50:02,650 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:50:03,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:50:43,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:50:43,304 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 19:50:43,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:50:43,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746424772] [2022-01-31 19:50:43,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [746424772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:50:43,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:50:43,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [200] imperfect sequences [] total 200 [2022-01-31 19:50:43,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210422423] [2022-01-31 19:50:43,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:50:43,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-01-31 19:50:43,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:50:43,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-01-31 19:50:43,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4036, Invalid=35764, Unknown=0, NotChecked=0, Total=39800 [2022-01-31 19:50:43,307 INFO L87 Difference]: Start difference. First operand 231 states and 235 transitions. Second operand has 200 states, 200 states have (on average 1.13) internal successors, (226), 198 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:25,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:25,002 INFO L93 Difference]: Finished difference Result 373 states and 380 transitions. [2022-01-31 19:51:25,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-01-31 19:51:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 200 states have (on average 1.13) internal successors, (226), 198 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-01-31 19:51:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:25,004 INFO L225 Difference]: With dead ends: 373 [2022-01-31 19:51:25,004 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 19:51:25,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 15 SyntacticMatches, 8 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26856 ImplicationChecksByTransitivity, 58.0s TimeCoverageRelationStatistics Valid=7759, Invalid=80153, Unknown=0, NotChecked=0, Total=87912 [2022-01-31 19:51:25,009 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 606 mSDsCounter, 0 mSdLazyCounter, 15459 mSolverCounterSat, 636 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 16095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 636 IncrementalHoareTripleChecker+Valid, 15459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:25,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 622 Invalid, 16095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [636 Valid, 15459 Invalid, 0 Unknown, 0 Unchecked, 13.0s Time] [2022-01-31 19:51:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 19:51:25,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 324. [2022-01-31 19:51:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 319 states have (on average 1.025078369905956) internal successors, (327), 319 states have internal predecessors, (327), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 331 transitions. [2022-01-31 19:51:25,591 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 331 transitions. Word has length 230 [2022-01-31 19:51:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:25,591 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 331 transitions. [2022-01-31 19:51:25,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 200 states have (on average 1.13) internal successors, (226), 198 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:25,592 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 331 transitions. [2022-01-31 19:51:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 19:51:25,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:25,592 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:25,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:51:25,592 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:25,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:25,593 INFO L85 PathProgramCache]: Analyzing trace with hash 158408222, now seen corresponding path program 61 times [2022-01-31 19:51:25,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:25,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618833657] [2022-01-31 19:51:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:25,594 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:25,594 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:25,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:25,595 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:26,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:26,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:26,178 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 19:51:26,179 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:26,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618833657] [2022-01-31 19:51:26,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [618833657] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:26,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:26,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:51:26,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183499083] [2022-01-31 19:51:26,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:26,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:51:26,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:51:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=1721, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:51:26,180 INFO L87 Difference]: Start difference. First operand 324 states and 331 transitions. Second operand has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:28,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:28,256 INFO L93 Difference]: Finished difference Result 642 states and 656 transitions. [2022-01-31 19:51:28,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:51:28,256 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2022-01-31 19:51:28,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:28,257 INFO L225 Difference]: With dead ends: 642 [2022-01-31 19:51:28,257 INFO L226 Difference]: Without dead ends: 327 [2022-01-31 19:51:28,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1095, Invalid=4017, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:51:28,258 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:28,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 98 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1918 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:51:28,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-01-31 19:51:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 326. [2022-01-31 19:51:28,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 321 states have (on average 1.0249221183800623) internal successors, (329), 321 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 333 transitions. [2022-01-31 19:51:28,830 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 333 transitions. Word has length 232 [2022-01-31 19:51:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:28,830 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 333 transitions. [2022-01-31 19:51:28,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:28,830 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 333 transitions. [2022-01-31 19:51:28,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 19:51:28,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:28,831 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:28,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:51:28,831 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:28,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:28,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1007276988, now seen corresponding path program 62 times [2022-01-31 19:51:28,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:28,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911579126] [2022-01-31 19:51:28,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:28,833 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:28,833 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:28,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:28,837 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:28,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:29,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:51:29,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:51:29,434 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 19:51:29,434 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:51:29,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911579126] [2022-01-31 19:51:29,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [911579126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:51:29,435 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:51:29,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 19:51:29,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231397910] [2022-01-31 19:51:29,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:51:29,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 19:51:29,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:51:29,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 19:51:29,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=1721, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 19:51:29,436 INFO L87 Difference]: Start difference. First operand 326 states and 333 transitions. Second operand has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:51:30,739 INFO L93 Difference]: Finished difference Result 427 states and 439 transitions. [2022-01-31 19:51:30,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:51:30,739 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-01-31 19:51:30,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:51:30,740 INFO L225 Difference]: With dead ends: 427 [2022-01-31 19:51:30,740 INFO L226 Difference]: Without dead ends: 241 [2022-01-31 19:51:30,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1597, Invalid=3515, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:51:30,741 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 686 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:51:30,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 83 Invalid, 1397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:51:30,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-01-31 19:51:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 241. [2022-01-31 19:51:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.021186440677966) internal successors, (241), 236 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 245 transitions. [2022-01-31 19:51:31,145 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 245 transitions. Word has length 234 [2022-01-31 19:51:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:51:31,145 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 245 transitions. [2022-01-31 19:51:31,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.25) internal successors, (108), 47 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:51:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 245 transitions. [2022-01-31 19:51:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-01-31 19:51:31,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:51:31,146 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:51:31,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:51:31,146 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:51:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:51:31,146 INFO L85 PathProgramCache]: Analyzing trace with hash 2141033878, now seen corresponding path program 63 times [2022-01-31 19:51:31,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:51:31,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852039204] [2022-01-31 19:51:31,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:51:31,147 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:51:31,147 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:51:31,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:51:31,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:51:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:20,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:52:20,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:52:20,139 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 19:52:20,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:52:20,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852039204] [2022-01-31 19:52:20,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852039204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:52:20,140 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:52:20,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [210] imperfect sequences [] total 210 [2022-01-31 19:52:20,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902543338] [2022-01-31 19:52:20,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:52:20,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 210 states [2022-01-31 19:52:20,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:52:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 210 interpolants. [2022-01-31 19:52:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3352, Invalid=40538, Unknown=0, NotChecked=0, Total=43890 [2022-01-31 19:52:20,142 INFO L87 Difference]: Start difference. First operand 241 states and 245 transitions. Second operand has 210 states, 210 states have (on average 1.1238095238095238) internal successors, (236), 208 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:00,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:00,463 INFO L93 Difference]: Finished difference Result 388 states and 395 transitions. [2022-01-31 19:53:00,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2022-01-31 19:53:00,463 INFO L78 Accepts]: Start accepts. Automaton has has 210 states, 210 states have (on average 1.1238095238095238) internal successors, (236), 208 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2022-01-31 19:53:00,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:00,465 INFO L225 Difference]: With dead ends: 388 [2022-01-31 19:53:00,465 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 19:53:00,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20993 ImplicationChecksByTransitivity, 61.4s TimeCoverageRelationStatistics Valid=4039, Invalid=66983, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 19:53:00,467 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 17688 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 18171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 17688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:00,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 704 Invalid, 18171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 17688 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2022-01-31 19:53:00,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 19:53:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 338. [2022-01-31 19:53:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.024024024024024) internal successors, (341), 333 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 345 transitions. [2022-01-31 19:53:01,135 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 345 transitions. Word has length 240 [2022-01-31 19:53:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:01,136 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 345 transitions. [2022-01-31 19:53:01,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 210 states, 210 states have (on average 1.1238095238095238) internal successors, (236), 208 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 345 transitions. [2022-01-31 19:53:01,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-01-31 19:53:01,136 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:01,137 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:01,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:53:01,137 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:01,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:01,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1663351988, now seen corresponding path program 64 times [2022-01-31 19:53:01,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:01,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370567179] [2022-01-31 19:53:01,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:01,139 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:01,139 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:01,139 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:01,141 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:01,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 19:53:01,871 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:01,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370567179] [2022-01-31 19:53:01,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1370567179] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:01,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:01,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:53:01,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007447044] [2022-01-31 19:53:01,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:01,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:53:01,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:01,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:53:01,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1868, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:53:01,872 INFO L87 Difference]: Start difference. First operand 338 states and 345 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:04,225 INFO L93 Difference]: Finished difference Result 670 states and 684 transitions. [2022-01-31 19:53:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:53:04,226 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-01-31 19:53:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:04,227 INFO L225 Difference]: With dead ends: 670 [2022-01-31 19:53:04,227 INFO L226 Difference]: Without dead ends: 341 [2022-01-31 19:53:04,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1190, Invalid=4360, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:53:04,228 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 127 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1537 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:04,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 69 Invalid, 1643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:53:04,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-01-31 19:53:04,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 340. [2022-01-31 19:53:04,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.0238805970149254) internal successors, (343), 335 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:04,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 347 transitions. [2022-01-31 19:53:04,875 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 347 transitions. Word has length 242 [2022-01-31 19:53:04,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:04,876 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 347 transitions. [2022-01-31 19:53:04,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:04,876 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 347 transitions. [2022-01-31 19:53:04,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-01-31 19:53:04,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:04,877 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:04,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:53:04,877 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:04,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:04,877 INFO L85 PathProgramCache]: Analyzing trace with hash -817527598, now seen corresponding path program 65 times [2022-01-31 19:53:04,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:04,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026497294] [2022-01-31 19:53:04,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:04,878 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:04,878 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:04,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:04,880 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:04,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:05,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:53:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:53:05,528 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 19:53:05,528 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:53:05,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026497294] [2022-01-31 19:53:05,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1026497294] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:53:05,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:53:05,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 19:53:05,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361452999] [2022-01-31 19:53:05,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:53:05,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 19:53:05,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:53:05,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 19:53:05,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1868, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:53:05,530 INFO L87 Difference]: Start difference. First operand 340 states and 347 transitions. Second operand has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:06,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:53:06,829 INFO L93 Difference]: Finished difference Result 445 states and 457 transitions. [2022-01-31 19:53:06,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:53:06,829 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-01-31 19:53:06,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:53:06,830 INFO L225 Difference]: With dead ends: 445 [2022-01-31 19:53:06,830 INFO L226 Difference]: Without dead ends: 251 [2022-01-31 19:53:06,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1738, Invalid=3812, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:53:06,831 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 623 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:53:06,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 69 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:53:06,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-01-31 19:53:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 251. [2022-01-31 19:53:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0203252032520325) internal successors, (251), 246 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 255 transitions. [2022-01-31 19:53:07,306 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 255 transitions. Word has length 244 [2022-01-31 19:53:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:53:07,306 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 255 transitions. [2022-01-31 19:53:07,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.24) internal successors, (112), 49 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 19:53:07,306 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 255 transitions. [2022-01-31 19:53:07,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-01-31 19:53:07,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:53:07,307 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:53:07,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:53:07,307 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:53:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:53:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1556337108, now seen corresponding path program 66 times [2022-01-31 19:53:07,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:53:07,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149462884] [2022-01-31 19:53:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:53:07,308 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 19:53:07,309 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 19:53:07,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:53:07,310 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:53:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat