/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:13:17,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:13:17,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:13:18,012 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:13:18,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-24 01:13:18,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-24 01:13:18,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-24 01:13:18,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-24 01:13:18,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-24 01:13:18,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-24 01:13:18,023 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-24 01:13:18,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-24 01:13:18,025 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-24 01:13:18,026 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-24 01:13:18,026 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-24 01:13:18,027 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-24 01:13:18,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-24 01:13:18,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:13:18,035 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:13:18,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:13:18,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:13:18,048 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:13:18,048 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:13:18,049 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:13:18,049 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:13:18,049 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:13:18,049 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:13:18,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:13:18,051 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:13:18,051 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:13:18,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:13:18,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:13:18,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:13:18,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:13:18,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:13:18,051 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:13:18,052 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:13:18,052 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:13:18,200 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:13:18,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:13:18,214 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:13:18,215 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:13:18,215 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:13:18,216 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2022-02-24 01:13:18,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/719ce3e2c/f0674ab2be974f57b81498be3cdd12c2/FLAGd7e624bc0 [2022-02-24 01:13:18,631 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:13:18,631 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i [2022-02-24 01:13:18,638 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/719ce3e2c/f0674ab2be974f57b81498be3cdd12c2/FLAGd7e624bc0 [2022-02-24 01:13:18,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/719ce3e2c/f0674ab2be974f57b81498be3cdd12c2 [2022-02-24 01:13:18,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:13:18,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:13:18,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:13:18,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:13:18,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:13:18,658 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@273d24a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18, skipping insertion in model container [2022-02-24 01:13:18,659 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:13:18,675 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:13:18,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2022-02-24 01:13:18,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:13:18,833 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:13:18,840 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_2-1-simple.i[809,822] [2022-02-24 01:13:18,846 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:13:18,855 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:13:18,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18 WrapperNode [2022-02-24 01:13:18,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:13:18,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:13:18,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:13:18,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:13:18,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,889 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:13:18,890 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:13:18,890 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:13:18,890 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:13:18,891 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (1/1) ... [2022-02-24 01:13:18,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:13:18,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:13:18,911 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 01:13:18,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 01:13:18,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:13:18,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:13:18,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:13:18,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:13:18,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:13:18,950 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-02-24 01:13:18,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:13:18,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:13:18,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:13:18,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:13:18,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:13:18,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:13:19,023 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:13:19,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:13:19,119 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:13:19,122 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:13:19,123 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 01:13:19,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:13:19 BoogieIcfgContainer [2022-02-24 01:13:19,124 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:13:19,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:13:19,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:13:19,127 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:13:19,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:13:18" (1/3) ... [2022-02-24 01:13:19,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5806c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:13:19, skipping insertion in model container [2022-02-24 01:13:19,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:18" (2/3) ... [2022-02-24 01:13:19,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e5806c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:13:19, skipping insertion in model container [2022-02-24 01:13:19,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:13:19" (3/3) ... [2022-02-24 01:13:19,129 INFO L111 eAbstractionObserver]: Analyzing ICFG array_2-1-simple.i [2022-02-24 01:13:19,159 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:13:19,160 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:13:19,205 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:13:19,210 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-24 01:13:19,214 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:13:19,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:19,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 01:13:19,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:19,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:19,231 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:19,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:19,235 INFO L85 PathProgramCache]: Analyzing trace with hash -445681932, now seen corresponding path program 1 times [2022-02-24 01:13:19,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:19,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [370712568] [2022-02-24 01:13:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:19,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:19,297 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:13:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:19,452 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:19,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [370712568] [2022-02-24 01:13:19,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [370712568] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:19,453 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:19,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 01:13:19,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061637278] [2022-02-24 01:13:19,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:19,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 01:13:19,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 01:13:19,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:13:19,483 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:19,529 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-02-24 01:13:19,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 01:13:19,536 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 01:13:19,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:19,541 INFO L225 Difference]: With dead ends: 34 [2022-02-24 01:13:19,542 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 01:13:19,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:13:19,547 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:19,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 01:13:19,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 01:13:19,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-02-24 01:13:19,575 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2022-02-24 01:13:19,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:19,575 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-02-24 01:13:19,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,575 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-02-24 01:13:19,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 01:13:19,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:19,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:19,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:13:19,576 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:19,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:19,577 INFO L85 PathProgramCache]: Analyzing trace with hash -617456838, now seen corresponding path program 1 times [2022-02-24 01:13:19,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:19,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [220790854] [2022-02-24 01:13:19,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:19,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:19,584 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:13:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:19,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:19,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [220790854] [2022-02-24 01:13:19,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [220790854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:19,662 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:19,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:13:19,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267691059] [2022-02-24 01:13:19,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:19,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:13:19,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:19,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:13:19,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:13:19,667 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:19,699 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-02-24 01:13:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:13:19,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 01:13:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:19,701 INFO L225 Difference]: With dead ends: 22 [2022-02-24 01:13:19,701 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 01:13:19,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:19,704 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:19,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:19,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 01:13:19,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2022-02-24 01:13:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-02-24 01:13:19,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-02-24 01:13:19,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:19,711 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-02-24 01:13:19,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-02-24 01:13:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 01:13:19,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:19,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:19,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:13:19,714 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:19,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:19,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1544621860, now seen corresponding path program 1 times [2022-02-24 01:13:19,720 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:19,720 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2023913468] [2022-02-24 01:13:19,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:19,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:19,735 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:19,735 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:19,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:19,794 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:19,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2023913468] [2022-02-24 01:13:19,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2023913468] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:19,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:19,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:13:19,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633637836] [2022-02-24 01:13:19,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:19,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:13:19,795 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:19,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:13:19,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:19,798 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:19,842 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-02-24 01:13:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:13:19,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 01:13:19,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:19,843 INFO L225 Difference]: With dead ends: 24 [2022-02-24 01:13:19,843 INFO L226 Difference]: Without dead ends: 18 [2022-02-24 01:13:19,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:19,847 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:19,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:19,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-24 01:13:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2022-02-24 01:13:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-02-24 01:13:19,855 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-02-24 01:13:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:19,855 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-02-24 01:13:19,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-02-24 01:13:19,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-24 01:13:19,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:19,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:19,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:13:19,856 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:19,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:19,857 INFO L85 PathProgramCache]: Analyzing trace with hash 802989566, now seen corresponding path program 2 times [2022-02-24 01:13:19,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:19,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479072326] [2022-02-24 01:13:19,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:19,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:19,864 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:19,864 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:19,864 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:19,930 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:19,930 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479072326] [2022-02-24 01:13:19,930 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479072326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:19,931 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:19,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:13:19,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045254550] [2022-02-24 01:13:19,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:19,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:13:19,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:19,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:13:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:13:19,939 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:19,988 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-02-24 01:13:19,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:13:19,988 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-24 01:13:19,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:19,990 INFO L225 Difference]: With dead ends: 26 [2022-02-24 01:13:19,990 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 01:13:19,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:19,995 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:19,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:19,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 01:13:19,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-02-24 01:13:19,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-02-24 01:13:19,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-02-24 01:13:19,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:19,998 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-02-24 01:13:19,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-02-24 01:13:19,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-24 01:13:19,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:19,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:19,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:13:19,999 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:19,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1999739552, now seen corresponding path program 3 times [2022-02-24 01:13:19,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:19,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026819895] [2022-02-24 01:13:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,002 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,003 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,078 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026819895] [2022-02-24 01:13:20,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2026819895] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:20,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680787239] [2022-02-24 01:13:20,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:20,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:20,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:20,080 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,198 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-02-24 01:13:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:13:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-24 01:13:20,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,202 INFO L225 Difference]: With dead ends: 28 [2022-02-24 01:13:20,202 INFO L226 Difference]: Without dead ends: 22 [2022-02-24 01:13:20,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:20,203 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-24 01:13:20,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2022-02-24 01:13:20,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-02-24 01:13:20,207 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-02-24 01:13:20,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,210 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-02-24 01:13:20,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,210 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-02-24 01:13:20,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 01:13:20,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,211 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:13:20,211 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1025240770, now seen corresponding path program 4 times [2022-02-24 01:13:20,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112789009] [2022-02-24 01:13:20,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,218 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,218 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,273 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112789009] [2022-02-24 01:13:20,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [112789009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,273 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:13:20,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22551088] [2022-02-24 01:13:20,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:13:20,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:13:20,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:13:20,275 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,327 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-02-24 01:13:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 01:13:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,328 INFO L225 Difference]: With dead ends: 30 [2022-02-24 01:13:20,328 INFO L226 Difference]: Without dead ends: 24 [2022-02-24 01:13:20,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:20,329 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 24 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:20,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-24 01:13:20,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-02-24 01:13:20,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-02-24 01:13:20,333 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-02-24 01:13:20,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,333 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-02-24 01:13:20,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,333 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-02-24 01:13:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 01:13:20,334 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,334 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:13:20,334 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,334 INFO L85 PathProgramCache]: Analyzing trace with hash 834781796, now seen corresponding path program 5 times [2022-02-24 01:13:20,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269336046] [2022-02-24 01:13:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,337 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,337 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,337 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269336046] [2022-02-24 01:13:20,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [269336046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:20,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028226689] [2022-02-24 01:13:20,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:20,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:20,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:20,392 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,458 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-02-24 01:13:20,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:20,458 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 01:13:20,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,459 INFO L225 Difference]: With dead ends: 32 [2022-02-24 01:13:20,459 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 01:13:20,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:20,460 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:20,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 01:13:20,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-24 01:13:20,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-02-24 01:13:20,463 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-02-24 01:13:20,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,464 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-02-24 01:13:20,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,464 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-02-24 01:13:20,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 01:13:20,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,464 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:13:20,464 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1807665786, now seen corresponding path program 6 times [2022-02-24 01:13:20,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365976839] [2022-02-24 01:13:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,467 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,467 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,468 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,530 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,530 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365976839] [2022-02-24 01:13:20,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365976839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:20,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456515851] [2022-02-24 01:13:20,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:20,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:20,532 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,606 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-02-24 01:13:20,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:13:20,607 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-24 01:13:20,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,607 INFO L225 Difference]: With dead ends: 34 [2022-02-24 01:13:20,607 INFO L226 Difference]: Without dead ends: 28 [2022-02-24 01:13:20,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:13:20,608 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 34 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:20,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-24 01:13:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-24 01:13:20,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-02-24 01:13:20,612 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-02-24 01:13:20,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,612 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-02-24 01:13:20,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,612 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-02-24 01:13:20,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 01:13:20,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,613 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:13:20,613 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1420847144, now seen corresponding path program 7 times [2022-02-24 01:13:20,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474892774] [2022-02-24 01:13:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,616 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,616 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,691 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474892774] [2022-02-24 01:13:20,691 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [474892774] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,691 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:13:20,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869971397] [2022-02-24 01:13:20,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:13:20,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:13:20,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:20,693 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,777 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-02-24 01:13:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:13:20,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 01:13:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,778 INFO L225 Difference]: With dead ends: 36 [2022-02-24 01:13:20,778 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 01:13:20,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:13:20,779 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:20,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 01:13:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2022-02-24 01:13:20,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-02-24 01:13:20,784 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-02-24 01:13:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,784 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-02-24 01:13:20,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,784 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-02-24 01:13:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:13:20,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,785 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:13:20,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1239582134, now seen corresponding path program 8 times [2022-02-24 01:13:20,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947140898] [2022-02-24 01:13:20,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,788 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,788 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,789 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947140898] [2022-02-24 01:13:20,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [947140898] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:13:20,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234137678] [2022-02-24 01:13:20,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:13:20,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:13:20,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:20,866 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,963 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-02-24 01:13:20,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:13:20,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:13:20,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,964 INFO L225 Difference]: With dead ends: 38 [2022-02-24 01:13:20,964 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 01:13:20,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:20,965 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 24 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:20,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 01:13:20,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-02-24 01:13:20,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-02-24 01:13:20,969 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-02-24 01:13:20,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,969 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-02-24 01:13:20,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,970 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-02-24 01:13:20,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 01:13:20,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,970 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:13:20,970 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1888390124, now seen corresponding path program 9 times [2022-02-24 01:13:20,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495908194] [2022-02-24 01:13:20,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,973 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,973 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:21,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:21,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495908194] [2022-02-24 01:13:21,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [495908194] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:21,056 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:21,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:21,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948472344] [2022-02-24 01:13:21,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:21,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:21,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:21,057 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:21,171 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-02-24 01:13:21,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 01:13:21,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:21,172 INFO L225 Difference]: With dead ends: 40 [2022-02-24 01:13:21,172 INFO L226 Difference]: Without dead ends: 34 [2022-02-24 01:13:21,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:21,173 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:21,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 24 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-24 01:13:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-02-24 01:13:21,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-02-24 01:13:21,178 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-02-24 01:13:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:21,179 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-02-24 01:13:21,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,179 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-02-24 01:13:21,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 01:13:21,179 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:21,179 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:21,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:13:21,180 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:21,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1392622862, now seen corresponding path program 10 times [2022-02-24 01:13:21,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:21,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428185744] [2022-02-24 01:13:21,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:21,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:21,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:21,183 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:21,183 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:21,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:21,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:21,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428185744] [2022-02-24 01:13:21,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1428185744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:21,299 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:21,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:13:21,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399707559] [2022-02-24 01:13:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:21,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:13:21,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:13:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:13:21,300 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:21,478 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-02-24 01:13:21,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:13:21,479 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 01:13:21,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:21,479 INFO L225 Difference]: With dead ends: 42 [2022-02-24 01:13:21,479 INFO L226 Difference]: Without dead ends: 36 [2022-02-24 01:13:21,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:13:21,480 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:21,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:21,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-24 01:13:21,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-02-24 01:13:21,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 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) [2022-02-24 01:13:21,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-02-24 01:13:21,486 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-02-24 01:13:21,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:21,486 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-02-24 01:13:21,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,486 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-02-24 01:13:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:13:21,486 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:21,486 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:21,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:13:21,487 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:21,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1701653936, now seen corresponding path program 11 times [2022-02-24 01:13:21,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:21,487 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042617270] [2022-02-24 01:13:21,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:21,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:21,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:21,490 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:21,490 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:21,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:21,593 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:21,593 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042617270] [2022-02-24 01:13:21,593 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1042617270] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:21,593 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:21,593 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:13:21,593 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892983464] [2022-02-24 01:13:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:21,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:13:21,594 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:13:21,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:21,594 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:21,745 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-02-24 01:13:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:13:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:13:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:21,746 INFO L225 Difference]: With dead ends: 44 [2022-02-24 01:13:21,746 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 01:13:21,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:13:21,747 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:21,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 01:13:21,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-02-24 01:13:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 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) [2022-02-24 01:13:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-02-24 01:13:21,752 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-02-24 01:13:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:21,752 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-02-24 01:13:21,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-02-24 01:13:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 01:13:21,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:21,753 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:21,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:13:21,753 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:21,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1967194670, now seen corresponding path program 12 times [2022-02-24 01:13:21,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:21,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751329506] [2022-02-24 01:13:21,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:21,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:21,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:21,756 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:21,756 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:21,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:21,869 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:21,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751329506] [2022-02-24 01:13:21,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1751329506] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:21,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:21,870 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:13:21,870 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265380134] [2022-02-24 01:13:21,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:21,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:13:21,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:21,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:13:21,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:21,871 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2022-02-24 01:13:22,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:22,023 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-02-24 01:13:22,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:13:22,023 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 01:13:22,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:22,024 INFO L225 Difference]: With dead ends: 46 [2022-02-24 01:13:22,024 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 01:13:22,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:22,025 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:22,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 44 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:22,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 01:13:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-02-24 01:13:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-02-24 01:13:22,030 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-02-24 01:13:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:22,030 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-02-24 01:13:22,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 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) [2022-02-24 01:13:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-02-24 01:13:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 01:13:22,030 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:22,030 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:22,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:13:22,031 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:22,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1562555020, now seen corresponding path program 13 times [2022-02-24 01:13:22,031 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:22,031 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766189326] [2022-02-24 01:13:22,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:22,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:22,034 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:22,034 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:22,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:22,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766189326] [2022-02-24 01:13:22,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [766189326] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:22,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:22,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:13:22,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477610583] [2022-02-24 01:13:22,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:22,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:13:22,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:13:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:13:22,177 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:22,342 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-02-24 01:13:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:13:22,343 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 01:13:22,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:22,343 INFO L225 Difference]: With dead ends: 48 [2022-02-24 01:13:22,343 INFO L226 Difference]: Without dead ends: 42 [2022-02-24 01:13:22,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:13:22,344 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:22,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 29 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:22,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-24 01:13:22,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-02-24 01:13:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-02-24 01:13:22,349 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-02-24 01:13:22,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:22,349 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-02-24 01:13:22,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,349 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-02-24 01:13:22,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:13:22,350 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:22,350 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:22,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:13:22,350 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash 749091990, now seen corresponding path program 14 times [2022-02-24 01:13:22,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:22,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097176517] [2022-02-24 01:13:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:22,353 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:22,353 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:22,353 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:22,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:22,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097176517] [2022-02-24 01:13:22,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1097176517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:22,497 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:22,497 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:22,497 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491244144] [2022-02-24 01:13:22,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:22,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:22,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:22,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:22,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:22,498 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:22,707 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-02-24 01:13:22,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 01:13:22,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-24 01:13:22,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:22,708 INFO L225 Difference]: With dead ends: 50 [2022-02-24 01:13:22,708 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 01:13:22,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:13:22,709 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:22,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 39 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:22,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 01:13:22,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-02-24 01:13:22,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-02-24 01:13:22,714 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-02-24 01:13:22,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:22,714 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-02-24 01:13:22,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-02-24 01:13:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-24 01:13:22,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:22,715 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:22,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:13:22,715 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:22,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:22,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1743776568, now seen corresponding path program 15 times [2022-02-24 01:13:22,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:22,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126869971] [2022-02-24 01:13:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:22,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:22,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:22,719 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:22,719 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:22,869 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:22,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126869971] [2022-02-24 01:13:22,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [126869971] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:22,869 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:22,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:13:22,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318270433] [2022-02-24 01:13:22,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:22,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:13:22,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:22,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:13:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:13:22,870 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:23,065 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-02-24 01:13:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:13:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-24 01:13:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:23,066 INFO L225 Difference]: With dead ends: 52 [2022-02-24 01:13:23,066 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 01:13:23,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:13:23,067 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:23,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 49 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:23,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 01:13:23,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-02-24 01:13:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 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) [2022-02-24 01:13:23,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-02-24 01:13:23,073 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-02-24 01:13:23,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:23,073 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-02-24 01:13:23,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:23,073 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-02-24 01:13:23,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 01:13:23,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:23,073 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:23,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:13:23,074 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:23,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:23,074 INFO L85 PathProgramCache]: Analyzing trace with hash -142050982, now seen corresponding path program 16 times [2022-02-24 01:13:23,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:23,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459350935] [2022-02-24 01:13:23,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:23,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:23,077 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:23,077 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:23,077 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:23,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:23,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:23,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:23,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459350935] [2022-02-24 01:13:23,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1459350935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:23,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:23,232 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:13:23,232 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847252095] [2022-02-24 01:13:23,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:23,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:13:23,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:23,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:13:23,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:13:23,233 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2022-02-24 01:13:23,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:23,439 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-02-24 01:13:23,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 01:13:23,440 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-24 01:13:23,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:23,440 INFO L225 Difference]: With dead ends: 54 [2022-02-24 01:13:23,440 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 01:13:23,441 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:13:23,441 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:23,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 24 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:23,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 01:13:23,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-02-24 01:13:23,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:23,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-02-24 01:13:23,447 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-02-24 01:13:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:23,447 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-02-24 01:13:23,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 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) [2022-02-24 01:13:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-02-24 01:13:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:13:23,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:23,447 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:23,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:13:23,448 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:23,448 INFO L85 PathProgramCache]: Analyzing trace with hash 53872380, now seen corresponding path program 17 times [2022-02-24 01:13:23,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:23,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984474883] [2022-02-24 01:13:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:23,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:23,451 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:23,451 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:23,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:23,619 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:23,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984474883] [2022-02-24 01:13:23,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [984474883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:23,620 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:23,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:13:23,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153500247] [2022-02-24 01:13:23,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:23,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:13:23,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:13:23,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:23,621 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:23,850 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-02-24 01:13:23,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:13:23,850 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-24 01:13:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:23,851 INFO L225 Difference]: With dead ends: 56 [2022-02-24 01:13:23,851 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 01:13:23,852 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:13:23,852 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:23,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 01:13:23,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-02-24 01:13:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:23,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-02-24 01:13:23,857 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-02-24 01:13:23,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:23,857 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-02-24 01:13:23,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:23,858 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-02-24 01:13:23,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:13:23,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:23,858 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:23,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:13:23,858 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash -642337762, now seen corresponding path program 18 times [2022-02-24 01:13:23,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:23,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127982464] [2022-02-24 01:13:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:23,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:23,861 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:23,861 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:23,861 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:24,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:24,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127982464] [2022-02-24 01:13:24,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [127982464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:24,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:24,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:13:24,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266039413] [2022-02-24 01:13:24,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:24,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:13:24,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:24,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:13:24,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:13:24,033 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:24,281 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-02-24 01:13:24,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:13:24,282 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:13:24,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:24,282 INFO L225 Difference]: With dead ends: 58 [2022-02-24 01:13:24,282 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 01:13:24,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:13:24,283 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:24,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 29 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 01:13:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-02-24 01:13:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-02-24 01:13:24,289 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-02-24 01:13:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:24,289 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-02-24 01:13:24,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-02-24 01:13:24,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 01:13:24,289 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:24,289 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:24,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:13:24,290 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:24,290 INFO L85 PathProgramCache]: Analyzing trace with hash 314613952, now seen corresponding path program 19 times [2022-02-24 01:13:24,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:24,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670048381] [2022-02-24 01:13:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:24,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:24,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:24,293 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:24,293 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:24,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:24,516 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:24,516 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670048381] [2022-02-24 01:13:24,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [670048381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:24,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:24,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:24,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169610953] [2022-02-24 01:13:24,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:24,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:13:24,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:13:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:24,517 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2022-02-24 01:13:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:24,775 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-02-24 01:13:24,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:13:24,775 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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 [2022-02-24 01:13:24,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:24,776 INFO L225 Difference]: With dead ends: 60 [2022-02-24 01:13:24,776 INFO L226 Difference]: Without dead ends: 54 [2022-02-24 01:13:24,776 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:13:24,777 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:24,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:24,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-24 01:13:24,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-02-24 01:13:24,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-02-24 01:13:24,782 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-02-24 01:13:24,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:24,783 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-02-24 01:13:24,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 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) [2022-02-24 01:13:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-02-24 01:13:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-24 01:13:24,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:24,783 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:24,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:13:24,783 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:24,784 INFO L85 PathProgramCache]: Analyzing trace with hash 822209762, now seen corresponding path program 20 times [2022-02-24 01:13:24,784 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:24,784 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219422919] [2022-02-24 01:13:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:24,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:24,786 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:24,787 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:24,787 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:24,995 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:24,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219422919] [2022-02-24 01:13:24,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1219422919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:24,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:24,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:13:24,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686664299] [2022-02-24 01:13:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:24,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:13:24,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:24,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:13:24,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:13:24,997 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2022-02-24 01:13:25,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:25,241 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-02-24 01:13:25,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:13:25,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-24 01:13:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:25,243 INFO L225 Difference]: With dead ends: 62 [2022-02-24 01:13:25,243 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 01:13:25,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:13:25,244 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:25,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 44 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:25,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 01:13:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-24 01:13:25,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 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) [2022-02-24 01:13:25,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-02-24 01:13:25,283 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-02-24 01:13:25,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:25,284 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-02-24 01:13:25,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 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) [2022-02-24 01:13:25,284 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-02-24 01:13:25,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:13:25,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:25,284 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:25,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:13:25,285 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:25,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1004488572, now seen corresponding path program 21 times [2022-02-24 01:13:25,285 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:25,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495686319] [2022-02-24 01:13:25,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:25,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:25,289 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:25,289 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:25,289 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:25,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:25,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:25,514 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:25,514 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495686319] [2022-02-24 01:13:25,514 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1495686319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:25,514 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:25,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:13:25,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448168686] [2022-02-24 01:13:25,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:25,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:13:25,515 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:25,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:13:25,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:13:25,516 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:25,762 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-02-24 01:13:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:13:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:13:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:25,762 INFO L225 Difference]: With dead ends: 64 [2022-02-24 01:13:25,763 INFO L226 Difference]: Without dead ends: 58 [2022-02-24 01:13:25,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:13:25,764 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:25,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:25,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-02-24 01:13:25,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-02-24 01:13:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-02-24 01:13:25,771 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-02-24 01:13:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:25,772 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-02-24 01:13:25,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-02-24 01:13:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 01:13:25,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:25,772 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:25,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:13:25,772 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:25,773 INFO L85 PathProgramCache]: Analyzing trace with hash 180036518, now seen corresponding path program 22 times [2022-02-24 01:13:25,773 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:25,773 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406151505] [2022-02-24 01:13:25,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:25,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:25,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:25,777 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:25,777 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:25,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:26,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:26,020 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:26,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406151505] [2022-02-24 01:13:26,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1406151505] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:26,020 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:26,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:13:26,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403173104] [2022-02-24 01:13:26,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:26,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:13:26,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:26,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:13:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:26,021 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2022-02-24 01:13:26,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:26,282 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-02-24 01:13:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 01:13:26,282 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 01:13:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:26,283 INFO L225 Difference]: With dead ends: 66 [2022-02-24 01:13:26,283 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 01:13:26,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:13:26,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:26,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 39 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:26,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 01:13:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-02-24 01:13:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-02-24 01:13:26,290 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-02-24 01:13:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:26,290 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-02-24 01:13:26,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 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) [2022-02-24 01:13:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-02-24 01:13:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-24 01:13:26,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:26,291 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:26,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:13:26,291 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:26,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:26,291 INFO L85 PathProgramCache]: Analyzing trace with hash 342314568, now seen corresponding path program 23 times [2022-02-24 01:13:26,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:26,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174173903] [2022-02-24 01:13:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:26,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:26,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:26,294 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:26,294 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:26,555 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:26,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174173903] [2022-02-24 01:13:26,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174173903] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:26,555 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:26,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 01:13:26,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47826594] [2022-02-24 01:13:26,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:26,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 01:13:26,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 01:13:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:13:26,556 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:26,898 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-02-24 01:13:26,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:13:26,898 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-24 01:13:26,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:26,899 INFO L225 Difference]: With dead ends: 68 [2022-02-24 01:13:26,899 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 01:13:26,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:13:26,900 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:26,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 44 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 01:13:26,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-02-24 01:13:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-02-24 01:13:26,905 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-02-24 01:13:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:26,906 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-02-24 01:13:26,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,906 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-02-24 01:13:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:26,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:26,906 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:26,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:13:26,906 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:26,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1672697962, now seen corresponding path program 24 times [2022-02-24 01:13:26,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:26,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261250762] [2022-02-24 01:13:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:26,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:26,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:26,909 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:26,910 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:26,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:27,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:27,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:27,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:27,171 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:27,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261250762] [2022-02-24 01:13:27,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [261250762] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:27,171 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:27,171 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:13:27,172 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946571045] [2022-02-24 01:13:27,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:27,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:13:27,172 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:27,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:13:27,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:27,173 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2022-02-24 01:13:27,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:27,518 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-02-24 01:13:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:13:27,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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 [2022-02-24 01:13:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:27,519 INFO L225 Difference]: With dead ends: 70 [2022-02-24 01:13:27,519 INFO L226 Difference]: Without dead ends: 64 [2022-02-24 01:13:27,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:13:27,520 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:27,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 34 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:27,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-02-24 01:13:27,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-02-24 01:13:27,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-02-24 01:13:27,526 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-02-24 01:13:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:27,526 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-02-24 01:13:27,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 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) [2022-02-24 01:13:27,526 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-02-24 01:13:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 01:13:27,526 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:27,526 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:27,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:13:27,527 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:27,527 INFO L85 PathProgramCache]: Analyzing trace with hash 270885388, now seen corresponding path program 25 times [2022-02-24 01:13:27,527 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:27,527 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790743059] [2022-02-24 01:13:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:27,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:27,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:27,530 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:27,530 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:27,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:27,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:27,809 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:27,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790743059] [2022-02-24 01:13:27,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790743059] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:27,809 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:27,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:13:27,809 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486850342] [2022-02-24 01:13:27,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:27,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:13:27,809 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:27,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:13:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:13:27,810 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:28,178 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-02-24 01:13:28,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 01:13:28,178 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 01:13:28,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:28,179 INFO L225 Difference]: With dead ends: 72 [2022-02-24 01:13:28,179 INFO L226 Difference]: Without dead ends: 66 [2022-02-24 01:13:28,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:13:28,180 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:28,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 29 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:28,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-24 01:13:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-02-24 01:13:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 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) [2022-02-24 01:13:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-02-24 01:13:28,187 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-02-24 01:13:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:28,187 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-02-24 01:13:28,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:28,187 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-02-24 01:13:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 01:13:28,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:28,188 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:28,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:13:28,188 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:28,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1748732718, now seen corresponding path program 26 times [2022-02-24 01:13:28,188 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:28,188 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [170731838] [2022-02-24 01:13:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:28,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:28,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:28,191 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:28,191 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:28,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:28,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:28,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:28,511 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:28,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [170731838] [2022-02-24 01:13:28,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [170731838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:28,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:28,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:13:28,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68760605] [2022-02-24 01:13:28,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:28,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:13:28,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:28,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:13:28,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:13:28,512 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2022-02-24 01:13:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:28,905 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-02-24 01:13:28,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:13:28,905 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-02-24 01:13:28,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:28,906 INFO L225 Difference]: With dead ends: 74 [2022-02-24 01:13:28,906 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 01:13:28,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:13:28,907 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:28,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 29 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:28,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 01:13:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-02-24 01:13:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-02-24 01:13:28,914 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-02-24 01:13:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:28,914 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-02-24 01:13:28,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 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) [2022-02-24 01:13:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-02-24 01:13:28,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:13:28,914 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:28,914 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:28,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:13:28,915 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash 325841872, now seen corresponding path program 27 times [2022-02-24 01:13:28,915 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:28,915 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168443536] [2022-02-24 01:13:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:28,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:28,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:28,918 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:28,918 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:29,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:29,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:29,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:29,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168443536] [2022-02-24 01:13:29,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [168443536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:29,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:29,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 01:13:29,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559809485] [2022-02-24 01:13:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:29,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 01:13:29,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 01:13:29,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:13:29,248 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:29,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:29,660 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-02-24 01:13:29,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 01:13:29,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:13:29,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:29,661 INFO L225 Difference]: With dead ends: 76 [2022-02-24 01:13:29,661 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 01:13:29,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:13:29,662 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:29,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 29 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 01:13:29,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-02-24 01:13:29,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:29,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-02-24 01:13:29,669 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-02-24 01:13:29,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:29,670 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-02-24 01:13:29,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:29,671 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-02-24 01:13:29,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:13:29,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:29,672 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:29,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:13:29,672 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1272661006, now seen corresponding path program 28 times [2022-02-24 01:13:29,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:29,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480949580] [2022-02-24 01:13:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:29,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:29,675 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:29,675 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:29,675 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:29,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:29,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:29,956 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:29,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480949580] [2022-02-24 01:13:29,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1480949580] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:29,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:29,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:13:29,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224757572] [2022-02-24 01:13:29,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:29,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:13:29,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:29,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:13:29,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:13:29,958 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:30,401 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-02-24 01:13:30,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:13:30,404 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 01:13:30,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:30,404 INFO L225 Difference]: With dead ends: 78 [2022-02-24 01:13:30,404 INFO L226 Difference]: Without dead ends: 72 [2022-02-24 01:13:30,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:13:30,406 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:30,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 44 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:30,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-24 01:13:30,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-02-24 01:13:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:30,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-02-24 01:13:30,413 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-02-24 01:13:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:30,414 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-02-24 01:13:30,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-02-24 01:13:30,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:13:30,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:30,414 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:30,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:13:30,414 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:30,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:30,415 INFO L85 PathProgramCache]: Analyzing trace with hash 164365204, now seen corresponding path program 29 times [2022-02-24 01:13:30,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:30,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759003008] [2022-02-24 01:13:30,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:30,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:30,421 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:30,421 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:30,421 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:30,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:30,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:30,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:30,775 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:30,775 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759003008] [2022-02-24 01:13:30,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1759003008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:30,775 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:30,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 01:13:30,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921176659] [2022-02-24 01:13:30,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:30,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 01:13:30,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 01:13:30,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:13:30,776 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2022-02-24 01:13:31,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:31,238 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-02-24 01:13:31,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:13:31,238 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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 [2022-02-24 01:13:31,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:31,239 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:13:31,239 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 01:13:31,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:13:31,240 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:31,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 49 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 01:13:31,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-02-24 01:13:31,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-02-24 01:13:31,248 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-02-24 01:13:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:31,248 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-02-24 01:13:31,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 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) [2022-02-24 01:13:31,248 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-02-24 01:13:31,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-24 01:13:31,248 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:31,248 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:31,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:13:31,249 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:31,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:31,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1832916298, now seen corresponding path program 30 times [2022-02-24 01:13:31,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:31,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165475982] [2022-02-24 01:13:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:31,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:31,253 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:31,253 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:31,253 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:31,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:31,595 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:31,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165475982] [2022-02-24 01:13:31,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1165475982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:31,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:31,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 01:13:31,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944432037] [2022-02-24 01:13:31,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:31,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 01:13:31,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:31,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 01:13:31,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:13:31,597 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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) [2022-02-24 01:13:32,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:32,101 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-02-24 01:13:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:13:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-24 01:13:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:32,102 INFO L225 Difference]: With dead ends: 82 [2022-02-24 01:13:32,102 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 01:13:32,103 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:13:32,103 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:32,103 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 34 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 01:13:32,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-02-24 01:13:32,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 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) [2022-02-24 01:13:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-02-24 01:13:32,111 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-02-24 01:13:32,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:32,111 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-02-24 01:13:32,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 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) [2022-02-24 01:13:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-02-24 01:13:32,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 01:13:32,112 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:32,112 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:32,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:13:32,112 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:32,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:32,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1370058408, now seen corresponding path program 31 times [2022-02-24 01:13:32,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:32,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832129129] [2022-02-24 01:13:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:32,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:32,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:32,115 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:32,115 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:32,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:32,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:32,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:32,510 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:32,510 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:32,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832129129] [2022-02-24 01:13:32,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832129129] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:32,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:32,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 01:13:32,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980040442] [2022-02-24 01:13:32,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:32,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 01:13:32,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:32,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 01:13:32,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:13:32,512 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:33,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:33,032 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-02-24 01:13:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 01:13:33,032 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-24 01:13:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:33,033 INFO L225 Difference]: With dead ends: 84 [2022-02-24 01:13:33,033 INFO L226 Difference]: Without dead ends: 78 [2022-02-24 01:13:33,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:13:33,034 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:33,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 34 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:33,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-24 01:13:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-02-24 01:13:33,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:33,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-02-24 01:13:33,043 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-02-24 01:13:33,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:33,044 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-02-24 01:13:33,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:33,045 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-02-24 01:13:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-24 01:13:33,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:33,045 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:33,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:13:33,045 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1054742394, now seen corresponding path program 32 times [2022-02-24 01:13:33,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:33,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320516640] [2022-02-24 01:13:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:33,049 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:33,049 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:33,049 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:33,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:33,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320516640] [2022-02-24 01:13:33,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1320516640] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:33,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:33,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 01:13:33,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307499267] [2022-02-24 01:13:33,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:33,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 01:13:33,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 01:13:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:13:33,366 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2022-02-24 01:13:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:33,873 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-02-24 01:13:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:13:33,873 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-24 01:13:33,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:33,873 INFO L225 Difference]: With dead ends: 86 [2022-02-24 01:13:33,874 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 01:13:33,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:13:33,875 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:33,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 29 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:33,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 01:13:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-02-24 01:13:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 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) [2022-02-24 01:13:33,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-02-24 01:13:33,886 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-02-24 01:13:33,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:33,886 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-02-24 01:13:33,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 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) [2022-02-24 01:13:33,887 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-02-24 01:13:33,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-24 01:13:33,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:33,887 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:33,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:13:33,887 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:33,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:33,887 INFO L85 PathProgramCache]: Analyzing trace with hash -878928612, now seen corresponding path program 33 times [2022-02-24 01:13:33,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:33,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842126214] [2022-02-24 01:13:33,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:33,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:33,890 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:33,891 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:33,891 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:34,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:34,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:34,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:34,301 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:34,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842126214] [2022-02-24 01:13:34,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [842126214] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:34,301 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:34,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 01:13:34,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28638160] [2022-02-24 01:13:34,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:34,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 01:13:34,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:34,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 01:13:34,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:13:34,302 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:34,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:34,888 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-02-24 01:13:34,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 01:13:34,888 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2022-02-24 01:13:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:34,889 INFO L225 Difference]: With dead ends: 88 [2022-02-24 01:13:34,889 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 01:13:34,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:13:34,889 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:34,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 34 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:34,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 01:13:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-02-24 01:13:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 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) [2022-02-24 01:13:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-02-24 01:13:34,898 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-02-24 01:13:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:34,898 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-02-24 01:13:34,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-02-24 01:13:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 01:13:34,899 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:34,899 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:34,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:13:34,899 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 584073790, now seen corresponding path program 34 times [2022-02-24 01:13:34,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:34,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602041177] [2022-02-24 01:13:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:34,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:34,903 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:34,903 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:34,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:35,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:35,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:35,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:35,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602041177] [2022-02-24 01:13:35,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1602041177] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:35,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:35,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 01:13:35,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650326451] [2022-02-24 01:13:35,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:35,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 01:13:35,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:35,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 01:13:35,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 01:13:35,356 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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) [2022-02-24 01:13:35,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:35,947 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-02-24 01:13:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:13:35,948 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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 [2022-02-24 01:13:35,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:35,948 INFO L225 Difference]: With dead ends: 90 [2022-02-24 01:13:35,948 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 01:13:35,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:13:35,949 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:35,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 34 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 01:13:35,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-02-24 01:13:35,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:35,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-02-24 01:13:35,959 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-02-24 01:13:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:35,959 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-02-24 01:13:35,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 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) [2022-02-24 01:13:35,960 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-02-24 01:13:35,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 01:13:35,960 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:35,960 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:35,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:13:35,960 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:35,961 INFO L85 PathProgramCache]: Analyzing trace with hash 2075076320, now seen corresponding path program 35 times [2022-02-24 01:13:35,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:35,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906629297] [2022-02-24 01:13:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:35,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:35,964 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:35,964 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:36,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:36,444 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:36,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906629297] [2022-02-24 01:13:36,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [906629297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:36,445 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:36,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 01:13:36,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271668755] [2022-02-24 01:13:36,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:36,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 01:13:36,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:36,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 01:13:36,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 01:13:36,446 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:37,087 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-02-24 01:13:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 01:13:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-24 01:13:37,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:37,088 INFO L225 Difference]: With dead ends: 92 [2022-02-24 01:13:37,088 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 01:13:37,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:13:37,089 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:37,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 34 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 01:13:37,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-24 01:13:37,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 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) [2022-02-24 01:13:37,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-02-24 01:13:37,099 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-02-24 01:13:37,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:37,099 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-02-24 01:13:37,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:37,100 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-02-24 01:13:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 01:13:37,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:37,100 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:37,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:13:37,100 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:37,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:37,100 INFO L85 PathProgramCache]: Analyzing trace with hash 409430786, now seen corresponding path program 36 times [2022-02-24 01:13:37,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:37,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658305933] [2022-02-24 01:13:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:37,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:37,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:37,106 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:37,106 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:37,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:37,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:37,636 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:37,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658305933] [2022-02-24 01:13:37,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [658305933] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:37,636 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:37,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-24 01:13:37,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431923285] [2022-02-24 01:13:37,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:37,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-24 01:13:37,636 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:37,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-24 01:13:37,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:13:37,637 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 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) [2022-02-24 01:13:38,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:38,317 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-02-24 01:13:38,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-24 01:13:38,317 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-24 01:13:38,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:38,318 INFO L225 Difference]: With dead ends: 94 [2022-02-24 01:13:38,318 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 01:13:38,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 01:13:38,319 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:38,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 39 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:38,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 01:13:38,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-02-24 01:13:38,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:38,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-02-24 01:13:38,339 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-02-24 01:13:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:38,339 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-02-24 01:13:38,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 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) [2022-02-24 01:13:38,340 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-02-24 01:13:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 01:13:38,340 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:38,340 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:38,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:13:38,340 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:38,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1746874020, now seen corresponding path program 37 times [2022-02-24 01:13:38,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:38,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544324776] [2022-02-24 01:13:38,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:38,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:38,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:38,344 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:38,344 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:38,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:38,921 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:38,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544324776] [2022-02-24 01:13:38,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1544324776] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:38,921 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:38,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 01:13:38,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992076437] [2022-02-24 01:13:38,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:38,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 01:13:38,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:38,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 01:13:38,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:13:38,923 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:39,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:39,466 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-02-24 01:13:39,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 01:13:39,466 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 01:13:39,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:39,467 INFO L225 Difference]: With dead ends: 96 [2022-02-24 01:13:39,467 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 01:13:39,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 01:13:39,469 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:39,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 39 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:39,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 01:13:39,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-02-24 01:13:39,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:39,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-02-24 01:13:39,479 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-02-24 01:13:39,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:39,480 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-02-24 01:13:39,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:39,480 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-02-24 01:13:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 01:13:39,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:39,480 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:39,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:13:39,480 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:39,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:39,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1460366906, now seen corresponding path program 38 times [2022-02-24 01:13:39,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:39,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043976766] [2022-02-24 01:13:39,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:39,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:39,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:39,484 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:39,484 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:39,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:39,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:39,875 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043976766] [2022-02-24 01:13:39,875 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1043976766] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:39,875 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:39,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 01:13:39,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969264707] [2022-02-24 01:13:39,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:39,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 01:13:39,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:39,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 01:13:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 01:13:39,876 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 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) [2022-02-24 01:13:40,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:40,511 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-02-24 01:13:40,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 01:13:40,512 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 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 88 [2022-02-24 01:13:40,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:40,513 INFO L225 Difference]: With dead ends: 98 [2022-02-24 01:13:40,513 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 01:13:40,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 01:13:40,532 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:40,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 49 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:40,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 01:13:40,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-02-24 01:13:40,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-02-24 01:13:40,554 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-02-24 01:13:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:40,554 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-02-24 01:13:40,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 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) [2022-02-24 01:13:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-02-24 01:13:40,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-24 01:13:40,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:40,566 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:40,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:13:40,566 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:40,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:40,566 INFO L85 PathProgramCache]: Analyzing trace with hash 167621736, now seen corresponding path program 39 times [2022-02-24 01:13:40,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:40,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019105231] [2022-02-24 01:13:40,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:40,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:40,570 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:40,570 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:40,570 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:40,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:41,159 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:41,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019105231] [2022-02-24 01:13:41,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2019105231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:41,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:41,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 01:13:41,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011667556] [2022-02-24 01:13:41,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:41,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 01:13:41,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 01:13:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:13:41,160 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 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) [2022-02-24 01:13:41,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:41,900 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-02-24 01:13:41,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 01:13:41,900 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 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 [2022-02-24 01:13:41,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:41,901 INFO L225 Difference]: With dead ends: 100 [2022-02-24 01:13:41,901 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 01:13:41,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 01:13:41,902 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:41,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 39 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:41,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 01:13:41,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-02-24 01:13:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:41,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-02-24 01:13:41,933 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-02-24 01:13:41,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:41,934 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-02-24 01:13:41,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 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) [2022-02-24 01:13:41,934 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-02-24 01:13:41,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 01:13:41,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:41,934 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:41,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:13:41,934 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:41,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:41,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1296610954, now seen corresponding path program 40 times [2022-02-24 01:13:41,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:41,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087762927] [2022-02-24 01:13:41,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:41,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:41,938 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:41,938 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:41,938 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:42,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:42,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087762927] [2022-02-24 01:13:42,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087762927] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:42,549 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:42,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-24 01:13:42,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569282649] [2022-02-24 01:13:42,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:42,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-24 01:13:42,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:42,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-24 01:13:42,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 01:13:42,550 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 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) [2022-02-24 01:13:43,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:43,212 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-02-24 01:13:43,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-24 01:13:43,213 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 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 92 [2022-02-24 01:13:43,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:43,213 INFO L225 Difference]: With dead ends: 102 [2022-02-24 01:13:43,213 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 01:13:43,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 01:13:43,214 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:43,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 34 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 01:13:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-02-24 01:13:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:43,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-02-24 01:13:43,227 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-02-24 01:13:43,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:43,227 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-02-24 01:13:43,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 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) [2022-02-24 01:13:43,227 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-02-24 01:13:43,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 01:13:43,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:43,228 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:43,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:13:43,228 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:43,228 INFO L85 PathProgramCache]: Analyzing trace with hash -371476436, now seen corresponding path program 41 times [2022-02-24 01:13:43,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:43,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236470548] [2022-02-24 01:13:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:43,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:43,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:43,232 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:43,232 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:43,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:43,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:43,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:43,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:43,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236470548] [2022-02-24 01:13:43,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236470548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:43,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:43,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 01:13:43,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30897715] [2022-02-24 01:13:43,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:43,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 01:13:43,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:43,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 01:13:43,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 01:13:43,902 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:44,425 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-02-24 01:13:44,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 01:13:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:13:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:44,426 INFO L225 Difference]: With dead ends: 104 [2022-02-24 01:13:44,426 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 01:13:44,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 01:13:44,427 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:44,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 29 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 01:13:44,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-02-24 01:13:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-02-24 01:13:44,441 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-02-24 01:13:44,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:44,442 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-02-24 01:13:44,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,442 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-02-24 01:13:44,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 01:13:44,443 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:44,443 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:44,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:13:44,443 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:44,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:44,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1380656818, now seen corresponding path program 42 times [2022-02-24 01:13:44,444 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:44,444 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [787044823] [2022-02-24 01:13:44,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:44,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:44,448 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:44,448 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:45,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:45,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:45,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [787044823] [2022-02-24 01:13:45,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [787044823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:45,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:45,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-24 01:13:45,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523643914] [2022-02-24 01:13:45,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:45,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-24 01:13:45,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:45,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-24 01:13:45,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 01:13:45,080 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:45,910 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-02-24 01:13:45,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-24 01:13:45,910 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-24 01:13:45,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:45,911 INFO L225 Difference]: With dead ends: 106 [2022-02-24 01:13:45,911 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 01:13:45,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 01:13:45,912 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:45,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:45,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 01:13:45,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-02-24 01:13:45,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-02-24 01:13:45,925 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-02-24 01:13:45,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:45,925 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-02-24 01:13:45,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,925 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-02-24 01:13:45,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-24 01:13:45,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:45,926 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:45,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:13:45,926 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:45,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash -540395024, now seen corresponding path program 43 times [2022-02-24 01:13:45,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:45,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587714887] [2022-02-24 01:13:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:45,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:45,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:45,930 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:45,930 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:45,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:46,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:46,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:46,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:46,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587714887] [2022-02-24 01:13:46,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587714887] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:46,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:46,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 01:13:46,622 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821912477] [2022-02-24 01:13:46,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:46,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 01:13:46,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:46,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 01:13:46,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:13:46,623 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:47,508 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-02-24 01:13:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 01:13:47,509 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-24 01:13:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:47,509 INFO L225 Difference]: With dead ends: 108 [2022-02-24 01:13:47,509 INFO L226 Difference]: Without dead ends: 102 [2022-02-24 01:13:47,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 01:13:47,511 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:47,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 44 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:47,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-24 01:13:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-02-24 01:13:47,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:47,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-02-24 01:13:47,525 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-02-24 01:13:47,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:47,525 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-02-24 01:13:47,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-02-24 01:13:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-02-24 01:13:47,525 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:47,538 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:47,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:13:47,538 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:47,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:47,538 INFO L85 PathProgramCache]: Analyzing trace with hash -502662638, now seen corresponding path program 44 times [2022-02-24 01:13:47,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:47,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880210853] [2022-02-24 01:13:47,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:47,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:47,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:47,550 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:47,550 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:48,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:48,085 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:48,085 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880210853] [2022-02-24 01:13:48,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [880210853] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:48,085 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:48,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 01:13:48,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845457553] [2022-02-24 01:13:48,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:48,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 01:13:48,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 01:13:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 01:13:48,086 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 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) [2022-02-24 01:13:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:48,881 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-02-24 01:13:48,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 01:13:48,882 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 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 [2022-02-24 01:13:48,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:48,882 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:13:48,882 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:13:48,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 01:13:48,884 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:48,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 19 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:48,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:13:48,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-02-24 01:13:48,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:48,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-02-24 01:13:48,899 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-02-24 01:13:48,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:48,899 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-02-24 01:13:48,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 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) [2022-02-24 01:13:48,899 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-02-24 01:13:48,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:48,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:48,900 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:48,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:13:48,900 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:48,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1398421940, now seen corresponding path program 45 times [2022-02-24 01:13:48,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:48,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603220493] [2022-02-24 01:13:48,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:48,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:48,905 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:48,905 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:48,905 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:49,503 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:49,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603220493] [2022-02-24 01:13:49,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1603220493] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:49,504 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:49,504 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-24 01:13:49,504 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245177381] [2022-02-24 01:13:49,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:49,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-24 01:13:49,504 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-24 01:13:49,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-02-24 01:13:49,505 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:50,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:50,144 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-02-24 01:13:50,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-24 01:13:50,144 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:13:50,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:50,145 INFO L225 Difference]: With dead ends: 112 [2022-02-24 01:13:50,145 INFO L226 Difference]: Without dead ends: 106 [2022-02-24 01:13:50,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 01:13:50,147 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:50,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 54 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:50,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-02-24 01:13:50,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-02-24 01:13:50,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:50,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-02-24 01:13:50,167 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-02-24 01:13:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:50,167 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-02-24 01:13:50,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:50,167 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-02-24 01:13:50,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 01:13:50,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:50,168 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:50,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:13:50,168 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1315366698, now seen corresponding path program 46 times [2022-02-24 01:13:50,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:50,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928117035] [2022-02-24 01:13:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:50,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:50,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:50,171 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:50,171 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:50,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:50,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:50,704 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:50,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928117035] [2022-02-24 01:13:50,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928117035] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:50,705 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:50,705 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 01:13:50,705 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776938882] [2022-02-24 01:13:50,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:50,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 01:13:50,705 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 01:13:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 01:13:50,706 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 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) [2022-02-24 01:13:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:51,738 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-02-24 01:13:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 01:13:51,739 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 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 104 [2022-02-24 01:13:51,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:51,740 INFO L225 Difference]: With dead ends: 114 [2022-02-24 01:13:51,740 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 01:13:51,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 01:13:51,741 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:51,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 39 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 01:13:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-02-24 01:13:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 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) [2022-02-24 01:13:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-02-24 01:13:51,768 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-02-24 01:13:51,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:51,768 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-02-24 01:13:51,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 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) [2022-02-24 01:13:51,768 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-02-24 01:13:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-24 01:13:51,769 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:51,769 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:51,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:13:51,769 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:51,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:51,770 INFO L85 PathProgramCache]: Analyzing trace with hash 2073868152, now seen corresponding path program 47 times [2022-02-24 01:13:51,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:51,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741696030] [2022-02-24 01:13:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:51,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:51,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:51,775 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:51,775 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:51,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:52,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:52,583 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:52,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741696030] [2022-02-24 01:13:52,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741696030] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:52,583 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:52,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 01:13:52,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448076501] [2022-02-24 01:13:52,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:52,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 01:13:52,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 01:13:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 01:13:52,584 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:53,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:53,647 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-02-24 01:13:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 01:13:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-02-24 01:13:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:53,648 INFO L225 Difference]: With dead ends: 116 [2022-02-24 01:13:53,648 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 01:13:53,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 01:13:53,649 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:53,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 34 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:53,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 01:13:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-02-24 01:13:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 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) [2022-02-24 01:13:53,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-02-24 01:13:53,665 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-02-24 01:13:53,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:53,665 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-02-24 01:13:53,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:53,665 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-02-24 01:13:53,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-24 01:13:53,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:53,666 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:53,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:13:53,667 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:53,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:53,667 INFO L85 PathProgramCache]: Analyzing trace with hash -751618662, now seen corresponding path program 48 times [2022-02-24 01:13:53,668 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:53,668 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092985201] [2022-02-24 01:13:53,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:53,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:53,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:53,672 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:53,672 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:53,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:54,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:54,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:54,675 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:54,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092985201] [2022-02-24 01:13:54,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092985201] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:54,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:54,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 01:13:54,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486740676] [2022-02-24 01:13:54,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:54,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 01:13:54,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:54,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 01:13:54,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-02-24 01:13:54,677 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 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) [2022-02-24 01:13:55,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:55,656 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-02-24 01:13:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 01:13:55,656 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 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 108 [2022-02-24 01:13:55,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:55,657 INFO L225 Difference]: With dead ends: 118 [2022-02-24 01:13:55,657 INFO L226 Difference]: Without dead ends: 112 [2022-02-24 01:13:55,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 01:13:55,658 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:55,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 44 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:55,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-02-24 01:13:55,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-02-24 01:13:55,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-02-24 01:13:55,675 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2022-02-24 01:13:55,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:55,675 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-02-24 01:13:55,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 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) [2022-02-24 01:13:55,675 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-02-24 01:13:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 01:13:55,675 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:55,675 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:55,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:13:55,676 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:55,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:55,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1625115844, now seen corresponding path program 49 times [2022-02-24 01:13:55,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:55,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167517953] [2022-02-24 01:13:55,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:55,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:55,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:55,679 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:55,680 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:56,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:56,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:56,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:56,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167517953] [2022-02-24 01:13:56,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [167517953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:56,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:56,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-24 01:13:56,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274360115] [2022-02-24 01:13:56,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:56,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-24 01:13:56,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-24 01:13:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:13:56,614 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 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) [2022-02-24 01:13:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:57,717 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-02-24 01:13:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-24 01:13:57,717 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 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 [2022-02-24 01:13:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:57,717 INFO L225 Difference]: With dead ends: 120 [2022-02-24 01:13:57,718 INFO L226 Difference]: Without dead ends: 114 [2022-02-24 01:13:57,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 01:13:57,719 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:57,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 34 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:57,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-24 01:13:57,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-02-24 01:13:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:57,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-02-24 01:13:57,736 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2022-02-24 01:13:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:57,737 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-02-24 01:13:57,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 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) [2022-02-24 01:13:57,737 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-02-24 01:13:57,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-02-24 01:13:57,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:57,737 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:13:57,737 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:57,738 INFO L85 PathProgramCache]: Analyzing trace with hash 757682270, now seen corresponding path program 50 times [2022-02-24 01:13:57,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:57,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322123241] [2022-02-24 01:13:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:57,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:57,742 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:57,742 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:57,742 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:58,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:58,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:58,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:58,652 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:58,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322123241] [2022-02-24 01:13:58,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [322123241] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:58,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:58,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 01:13:58,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975722804] [2022-02-24 01:13:58,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:58,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 01:13:58,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 01:13:58,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 01:13:58,654 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 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) [2022-02-24 01:13:59,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:59,586 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-02-24 01:13:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 01:13:59,586 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 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 112 [2022-02-24 01:13:59,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:59,587 INFO L225 Difference]: With dead ends: 122 [2022-02-24 01:13:59,587 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 01:13:59,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 01:13:59,589 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:59,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 34 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 01:13:59,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-02-24 01:13:59,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:59,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-02-24 01:13:59,608 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2022-02-24 01:13:59,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:59,609 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-02-24 01:13:59,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 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) [2022-02-24 01:13:59,609 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-02-24 01:13:59,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-24 01:13:59,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:59,609 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:59,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:13:59,609 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:59,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:59,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1409101056, now seen corresponding path program 51 times [2022-02-24 01:13:59,610 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:59,610 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2015080332] [2022-02-24 01:13:59,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:59,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:59,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:59,614 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:59,614 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:00,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:00,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:00,550 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:00,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2015080332] [2022-02-24 01:14:00,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2015080332] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:00,550 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:00,550 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-24 01:14:00,550 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137108946] [2022-02-24 01:14:00,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:00,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-24 01:14:00,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:00,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-24 01:14:00,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:14:00,552 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:01,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:01,536 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-02-24 01:14:01,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-24 01:14:01,537 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-24 01:14:01,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:01,537 INFO L225 Difference]: With dead ends: 124 [2022-02-24 01:14:01,537 INFO L226 Difference]: Without dead ends: 118 [2022-02-24 01:14:01,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 01:14:01,538 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:01,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 39 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:01,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-02-24 01:14:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-02-24 01:14:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:01,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-02-24 01:14:01,557 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2022-02-24 01:14:01,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:01,557 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-02-24 01:14:01,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:01,558 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-02-24 01:14:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 01:14:01,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:01,558 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:01,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:14:01,559 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:01,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:01,559 INFO L85 PathProgramCache]: Analyzing trace with hash 357329186, now seen corresponding path program 52 times [2022-02-24 01:14:01,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:01,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098818175] [2022-02-24 01:14:01,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:01,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:01,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:01,564 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:01,564 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:02,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:02,539 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:02,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098818175] [2022-02-24 01:14:02,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1098818175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:02,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:02,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 01:14:02,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135213047] [2022-02-24 01:14:02,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:02,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 01:14:02,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:02,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 01:14:02,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 01:14:02,540 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 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) [2022-02-24 01:14:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:03,684 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-02-24 01:14:03,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 01:14:03,684 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 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 116 [2022-02-24 01:14:03,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:03,685 INFO L225 Difference]: With dead ends: 126 [2022-02-24 01:14:03,685 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 01:14:03,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 01:14:03,686 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:03,686 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 29 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:03,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 01:14:03,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-02-24 01:14:03,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:03,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-02-24 01:14:03,705 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2022-02-24 01:14:03,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:03,705 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-02-24 01:14:03,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 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) [2022-02-24 01:14:03,705 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-02-24 01:14:03,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-02-24 01:14:03,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:03,706 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:03,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:14:03,706 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1078123324, now seen corresponding path program 53 times [2022-02-24 01:14:03,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:03,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841917679] [2022-02-24 01:14:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:03,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:03,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:03,710 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:03,710 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:03,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:04,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:04,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:04,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841917679] [2022-02-24 01:14:04,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1841917679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:04,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:04,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 01:14:04,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157443152] [2022-02-24 01:14:04,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:04,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 01:14:04,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:04,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 01:14:04,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 01:14:04,408 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:05,558 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-02-24 01:14:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 01:14:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-02-24 01:14:05,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:05,559 INFO L225 Difference]: With dead ends: 128 [2022-02-24 01:14:05,559 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 01:14:05,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 01:14:05,561 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:05,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 49 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 01:14:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-02-24 01:14:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 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) [2022-02-24 01:14:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-02-24 01:14:05,580 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2022-02-24 01:14:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:05,581 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-02-24 01:14:05,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:05,581 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-02-24 01:14:05,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-24 01:14:05,581 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:05,581 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:05,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:14:05,581 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1863483418, now seen corresponding path program 54 times [2022-02-24 01:14:05,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:05,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255240671] [2022-02-24 01:14:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:05,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:05,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:05,586 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:05,586 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:05,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:06,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:06,641 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:06,641 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255240671] [2022-02-24 01:14:06,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [255240671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:06,641 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:06,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-24 01:14:06,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878742151] [2022-02-24 01:14:06,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:06,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-24 01:14:06,641 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:06,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-24 01:14:06,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:14:06,642 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 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) [2022-02-24 01:14:07,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:07,478 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-02-24 01:14:07,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-24 01:14:07,479 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 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 [2022-02-24 01:14:07,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:07,480 INFO L225 Difference]: With dead ends: 130 [2022-02-24 01:14:07,480 INFO L226 Difference]: Without dead ends: 124 [2022-02-24 01:14:07,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 01:14:07,481 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:07,482 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 29 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-02-24 01:14:07,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-02-24 01:14:07,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-02-24 01:14:07,513 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2022-02-24 01:14:07,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:07,513 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-02-24 01:14:07,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 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) [2022-02-24 01:14:07,513 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-02-24 01:14:07,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-24 01:14:07,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:07,514 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:07,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 01:14:07,514 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:07,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:07,514 INFO L85 PathProgramCache]: Analyzing trace with hash -680289656, now seen corresponding path program 55 times [2022-02-24 01:14:07,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:07,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1395319390] [2022-02-24 01:14:07,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:07,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:07,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:07,519 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:07,519 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:07,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:08,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:08,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:08,438 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:08,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1395319390] [2022-02-24 01:14:08,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1395319390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:08,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:08,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 01:14:08,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305641844] [2022-02-24 01:14:08,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:08,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 01:14:08,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:08,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 01:14:08,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 01:14:08,439 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:09,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:09,680 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-02-24 01:14:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 01:14:09,681 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:14:09,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:09,681 INFO L225 Difference]: With dead ends: 132 [2022-02-24 01:14:09,681 INFO L226 Difference]: Without dead ends: 126 [2022-02-24 01:14:09,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 01:14:09,683 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:09,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 49 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:09,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-24 01:14:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-02-24 01:14:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 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) [2022-02-24 01:14:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-02-24 01:14:09,705 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2022-02-24 01:14:09,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:09,705 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-02-24 01:14:09,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:09,705 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-02-24 01:14:09,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 01:14:09,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:09,705 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:09,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 01:14:09,706 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:09,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:09,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1797417814, now seen corresponding path program 56 times [2022-02-24 01:14:09,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:09,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2032314124] [2022-02-24 01:14:09,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:09,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:09,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:09,710 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:09,710 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:11,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:11,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:11,026 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:11,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2032314124] [2022-02-24 01:14:11,026 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2032314124] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:11,026 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:11,026 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 01:14:11,026 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735513999] [2022-02-24 01:14:11,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:11,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 01:14:11,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:11,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 01:14:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 01:14:11,027 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:12,068 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-02-24 01:14:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 01:14:12,068 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-02-24 01:14:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:12,069 INFO L225 Difference]: With dead ends: 134 [2022-02-24 01:14:12,069 INFO L226 Difference]: Without dead ends: 128 [2022-02-24 01:14:12,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 01:14:12,070 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:12,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 44 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-24 01:14:12,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-02-24 01:14:12,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:12,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-02-24 01:14:12,092 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2022-02-24 01:14:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:12,092 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-02-24 01:14:12,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:12,093 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-02-24 01:14:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-24 01:14:12,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:12,093 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:12,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 01:14:12,093 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:12,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1615753652, now seen corresponding path program 57 times [2022-02-24 01:14:12,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:12,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [969213644] [2022-02-24 01:14:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:12,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:12,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:12,098 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:12,098 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:12,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:12,791 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:12,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [969213644] [2022-02-24 01:14:12,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [969213644] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:12,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:12,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 01:14:12,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863597745] [2022-02-24 01:14:12,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:12,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 01:14:12,792 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:12,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 01:14:12,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:14:12,793 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:14,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:14,206 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-02-24 01:14:14,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 01:14:14,206 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-02-24 01:14:14,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:14,207 INFO L225 Difference]: With dead ends: 136 [2022-02-24 01:14:14,207 INFO L226 Difference]: Without dead ends: 130 [2022-02-24 01:14:14,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 01:14:14,208 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:14,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 39 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-24 01:14:14,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-02-24 01:14:14,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-02-24 01:14:14,232 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2022-02-24 01:14:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:14,232 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-02-24 01:14:14,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-02-24 01:14:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-24 01:14:14,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:14,233 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:14,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 01:14:14,233 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:14,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:14,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1164814190, now seen corresponding path program 58 times [2022-02-24 01:14:14,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:14,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1159865436] [2022-02-24 01:14:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:14,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:14,237 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:14,237 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:15,419 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:15,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1159865436] [2022-02-24 01:14:15,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1159865436] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:15,419 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:15,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-24 01:14:15,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445910526] [2022-02-24 01:14:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:15,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-24 01:14:15,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-24 01:14:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 01:14:15,421 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:16,924 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-02-24 01:14:16,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-24 01:14:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-02-24 01:14:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:16,925 INFO L225 Difference]: With dead ends: 138 [2022-02-24 01:14:16,925 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 01:14:16,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 01:14:16,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:16,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 39 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:16,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 01:14:16,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-02-24 01:14:16,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:16,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-02-24 01:14:16,950 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2022-02-24 01:14:16,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:16,950 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-02-24 01:14:16,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:16,951 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-02-24 01:14:16,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-02-24 01:14:16,951 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:16,951 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:16,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 01:14:16,951 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:16,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1820852240, now seen corresponding path program 59 times [2022-02-24 01:14:16,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:16,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427127269] [2022-02-24 01:14:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:16,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:16,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:16,955 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:16,955 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:18,151 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:18,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427127269] [2022-02-24 01:14:18,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [427127269] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:18,151 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:18,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 01:14:18,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67129843] [2022-02-24 01:14:18,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:18,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 01:14:18,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:18,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 01:14:18,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:14:18,152 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 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) [2022-02-24 01:14:19,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:19,085 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-02-24 01:14:19,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 01:14:19,086 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 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 [2022-02-24 01:14:19,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:19,086 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:14:19,086 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:14:19,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 01:14:19,089 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 128 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:19,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 44 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:14:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-02-24 01:14:19,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-02-24 01:14:19,120 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2022-02-24 01:14:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:19,120 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-02-24 01:14:19,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 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) [2022-02-24 01:14:19,120 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-02-24 01:14:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-24 01:14:19,121 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:19,121 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:19,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 01:14:19,121 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:19,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash 913225778, now seen corresponding path program 60 times [2022-02-24 01:14:19,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:19,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1143878946] [2022-02-24 01:14:19,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:19,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:19,125 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:19,125 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:20,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:20,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:20,289 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:20,289 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1143878946] [2022-02-24 01:14:20,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1143878946] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:20,289 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:20,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-24 01:14:20,289 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654234501] [2022-02-24 01:14:20,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:20,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-24 01:14:20,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:20,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-24 01:14:20,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 01:14:20,292 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:21,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:21,238 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-02-24 01:14:21,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-24 01:14:21,239 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:14:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:21,240 INFO L225 Difference]: With dead ends: 142 [2022-02-24 01:14:21,240 INFO L226 Difference]: Without dead ends: 136 [2022-02-24 01:14:21,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 01:14:21,242 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:21,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 34 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:21,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-24 01:14:21,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-02-24 01:14:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 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) [2022-02-24 01:14:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-02-24 01:14:21,266 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2022-02-24 01:14:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-02-24 01:14:21,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-02-24 01:14:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-24 01:14:21,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:21,267 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:21,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 01:14:21,267 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:21,268 INFO L85 PathProgramCache]: Analyzing trace with hash 562556884, now seen corresponding path program 61 times [2022-02-24 01:14:21,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:21,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70894166] [2022-02-24 01:14:21,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:21,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:21,276 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:21,276 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:22,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:22,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:22,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:22,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70894166] [2022-02-24 01:14:22,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [70894166] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:22,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:22,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 01:14:22,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861352627] [2022-02-24 01:14:22,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:22,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 01:14:22,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:22,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 01:14:22,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-02-24 01:14:22,530 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:23,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:23,944 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-02-24 01:14:23,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 01:14:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-24 01:14:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:23,948 INFO L225 Difference]: With dead ends: 144 [2022-02-24 01:14:23,948 INFO L226 Difference]: Without dead ends: 138 [2022-02-24 01:14:23,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 01:14:23,953 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:23,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 29 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-24 01:14:24,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-02-24 01:14:24,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 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) [2022-02-24 01:14:24,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-02-24 01:14:24,002 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2022-02-24 01:14:24,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:24,002 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-02-24 01:14:24,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:24,002 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-02-24 01:14:24,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-02-24 01:14:24,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:24,019 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:24,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 01:14:24,020 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:24,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1422801162, now seen corresponding path program 62 times [2022-02-24 01:14:24,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:24,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958203098] [2022-02-24 01:14:24,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:24,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:24,027 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:24,027 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:24,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:24,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:24,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:24,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958203098] [2022-02-24 01:14:24,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958203098] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:24,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:24,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 01:14:24,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577298265] [2022-02-24 01:14:24,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:24,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 01:14:24,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:24,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 01:14:24,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 01:14:24,901 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:26,238 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-02-24 01:14:26,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 01:14:26,239 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-02-24 01:14:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:26,240 INFO L225 Difference]: With dead ends: 146 [2022-02-24 01:14:26,240 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 01:14:26,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 01:14:26,241 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 134 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:26,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 59 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 01:14:26,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-02-24 01:14:26,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:26,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-02-24 01:14:26,275 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2022-02-24 01:14:26,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:26,275 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-02-24 01:14:26,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:26,276 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-02-24 01:14:26,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-24 01:14:26,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:26,276 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:26,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 01:14:26,276 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:26,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:26,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1908563352, now seen corresponding path program 63 times [2022-02-24 01:14:26,277 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:26,277 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [500975053] [2022-02-24 01:14:26,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:26,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:26,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:26,281 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:26,281 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:27,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:27,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:27,615 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:27,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [500975053] [2022-02-24 01:14:27,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [500975053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:27,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:27,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 01:14:27,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149292508] [2022-02-24 01:14:27,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:27,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 01:14:27,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 01:14:27,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:14:27,617 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:28,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:28,744 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-02-24 01:14:28,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 01:14:28,744 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-02-24 01:14:28,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:28,745 INFO L225 Difference]: With dead ends: 148 [2022-02-24 01:14:28,745 INFO L226 Difference]: Without dead ends: 142 [2022-02-24 01:14:28,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 01:14:28,748 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 136 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:28,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 44 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-02-24 01:14:28,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-02-24 01:14:28,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-02-24 01:14:28,775 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2022-02-24 01:14:28,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:28,775 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-02-24 01:14:28,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:28,775 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-02-24 01:14:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-24 01:14:28,775 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:28,776 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:28,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 01:14:28,776 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:28,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:28,776 INFO L85 PathProgramCache]: Analyzing trace with hash -695741510, now seen corresponding path program 64 times [2022-02-24 01:14:28,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:28,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127346344] [2022-02-24 01:14:28,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:28,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:28,780 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:28,781 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:28,781 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:29,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:29,857 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:29,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127346344] [2022-02-24 01:14:29,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2127346344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:29,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:29,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-24 01:14:29,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760487180] [2022-02-24 01:14:29,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:29,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-24 01:14:29,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:29,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-24 01:14:29,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 01:14:29,859 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 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) [2022-02-24 01:14:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:30,959 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-02-24 01:14:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-24 01:14:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 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 [2022-02-24 01:14:30,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:30,960 INFO L225 Difference]: With dead ends: 150 [2022-02-24 01:14:30,960 INFO L226 Difference]: Without dead ends: 144 [2022-02-24 01:14:30,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 01:14:30,962 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:30,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 59 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:30,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-24 01:14:30,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2022-02-24 01:14:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-02-24 01:14:30,995 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2022-02-24 01:14:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:30,995 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-02-24 01:14:30,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 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) [2022-02-24 01:14:30,996 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-02-24 01:14:30,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-02-24 01:14:30,996 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:30,996 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:30,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 01:14:30,996 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:30,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:30,996 INFO L85 PathProgramCache]: Analyzing trace with hash 533219676, now seen corresponding path program 65 times [2022-02-24 01:14:30,997 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:30,997 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793100424] [2022-02-24 01:14:30,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:30,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:31,003 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:31,003 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:31,003 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:31,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:32,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:32,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:32,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:32,422 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:32,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793100424] [2022-02-24 01:14:32,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1793100424] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:32,429 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:32,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 01:14:32,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106294735] [2022-02-24 01:14:32,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:32,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 01:14:32,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:32,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 01:14:32,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 01:14:32,431 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:34,156 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-02-24 01:14:34,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 01:14:34,156 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:14:34,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:34,157 INFO L225 Difference]: With dead ends: 152 [2022-02-24 01:14:34,157 INFO L226 Difference]: Without dead ends: 146 [2022-02-24 01:14:34,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 01:14:34,159 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 140 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:34,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 49 Invalid, 250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-24 01:14:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-02-24 01:14:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-02-24 01:14:34,194 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2022-02-24 01:14:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:34,194 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-02-24 01:14:34,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-02-24 01:14:34,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-24 01:14:34,194 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:34,195 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:34,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 01:14:34,195 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:34,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:34,195 INFO L85 PathProgramCache]: Analyzing trace with hash 448913022, now seen corresponding path program 66 times [2022-02-24 01:14:34,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:34,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099840813] [2022-02-24 01:14:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:34,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:34,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:34,199 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:34,200 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:35,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:35,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:35,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:35,344 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:35,344 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099840813] [2022-02-24 01:14:35,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099840813] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:35,344 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:35,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-24 01:14:35,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829829016] [2022-02-24 01:14:35,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:35,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-24 01:14:35,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:35,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-24 01:14:35,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 01:14:35,346 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:36,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:36,471 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-02-24 01:14:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-24 01:14:36,472 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-24 01:14:36,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:36,472 INFO L225 Difference]: With dead ends: 154 [2022-02-24 01:14:36,472 INFO L226 Difference]: Without dead ends: 148 [2022-02-24 01:14:36,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 01:14:36,474 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 142 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:36,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 49 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:36,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-24 01:14:36,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2022-02-24 01:14:36,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:36,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2022-02-24 01:14:36,503 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2022-02-24 01:14:36,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:36,504 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2022-02-24 01:14:36,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:36,504 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2022-02-24 01:14:36,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-24 01:14:36,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:36,504 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:36,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 01:14:36,504 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:36,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:36,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1034597152, now seen corresponding path program 67 times [2022-02-24 01:14:36,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:36,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [614488452] [2022-02-24 01:14:36,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:36,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:36,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:36,509 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:36,509 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:36,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:37,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:37,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:37,448 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:37,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [614488452] [2022-02-24 01:14:37,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [614488452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:37,448 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:37,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 01:14:37,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432158172] [2022-02-24 01:14:37,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:37,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 01:14:37,449 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 01:14:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-02-24 01:14:37,450 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:38,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:38,686 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-02-24 01:14:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 01:14:38,686 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-02-24 01:14:38,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:38,687 INFO L225 Difference]: With dead ends: 156 [2022-02-24 01:14:38,687 INFO L226 Difference]: Without dead ends: 150 [2022-02-24 01:14:38,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 01:14:38,688 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:38,688 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 39 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:38,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-24 01:14:38,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2022-02-24 01:14:38,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 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) [2022-02-24 01:14:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2022-02-24 01:14:38,717 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2022-02-24 01:14:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:38,718 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2022-02-24 01:14:38,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:38,718 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2022-02-24 01:14:38,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-02-24 01:14:38,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:38,718 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:38,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 01:14:38,718 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:38,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:38,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1236330306, now seen corresponding path program 68 times [2022-02-24 01:14:38,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:38,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765834924] [2022-02-24 01:14:38,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:38,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:38,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:38,723 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:38,723 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:39,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:39,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:39,754 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:39,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765834924] [2022-02-24 01:14:39,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765834924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:39,754 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:39,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 01:14:39,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399969979] [2022-02-24 01:14:39,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:39,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 01:14:39,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 01:14:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 01:14:39,756 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:40,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:40,951 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-02-24 01:14:40,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 01:14:40,952 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-02-24 01:14:40,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:40,952 INFO L225 Difference]: With dead ends: 158 [2022-02-24 01:14:40,952 INFO L226 Difference]: Without dead ends: 152 [2022-02-24 01:14:40,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 01:14:40,954 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 146 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:40,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 34 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:40,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-24 01:14:41,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-02-24 01:14:41,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 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) [2022-02-24 01:14:41,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2022-02-24 01:14:41,002 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2022-02-24 01:14:41,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:41,002 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2022-02-24 01:14:41,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:41,002 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2022-02-24 01:14:41,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-02-24 01:14:41,003 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:41,003 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:41,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 01:14:41,003 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:41,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:41,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1828362980, now seen corresponding path program 69 times [2022-02-24 01:14:41,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:41,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115563678] [2022-02-24 01:14:41,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:41,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:41,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:41,008 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:41,008 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:42,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:42,130 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:42,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115563678] [2022-02-24 01:14:42,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [115563678] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:42,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:42,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 01:14:42,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110434932] [2022-02-24 01:14:42,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:42,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 01:14:42,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:42,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 01:14:42,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 01:14:42,132 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 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) [2022-02-24 01:14:43,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:43,400 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-02-24 01:14:43,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 01:14:43,400 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 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 [2022-02-24 01:14:43,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:43,401 INFO L225 Difference]: With dead ends: 160 [2022-02-24 01:14:43,401 INFO L226 Difference]: Without dead ends: 154 [2022-02-24 01:14:43,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 01:14:43,402 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 148 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:43,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 39 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:43,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-02-24 01:14:43,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-02-24 01:14:43,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2022-02-24 01:14:43,434 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2022-02-24 01:14:43,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:43,434 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2022-02-24 01:14:43,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 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) [2022-02-24 01:14:43,434 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2022-02-24 01:14:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-24 01:14:43,435 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:43,435 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:43,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 01:14:43,435 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:43,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:43,436 INFO L85 PathProgramCache]: Analyzing trace with hash -458887674, now seen corresponding path program 70 times [2022-02-24 01:14:43,436 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:43,436 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273872127] [2022-02-24 01:14:43,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:43,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:43,440 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:43,440 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:43,440 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:44,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:44,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:44,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:44,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273872127] [2022-02-24 01:14:44,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1273872127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:44,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:44,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-24 01:14:44,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370740283] [2022-02-24 01:14:44,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:44,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-24 01:14:44,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:44,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-24 01:14:44,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 01:14:44,686 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:45,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:45,936 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-02-24 01:14:45,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-24 01:14:45,936 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-02-24 01:14:45,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:45,937 INFO L225 Difference]: With dead ends: 162 [2022-02-24 01:14:45,937 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 01:14:45,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 01:14:45,938 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:45,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 34 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 01:14:45,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-02-24 01:14:45,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 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) [2022-02-24 01:14:45,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2022-02-24 01:14:45,971 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2022-02-24 01:14:45,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:45,972 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2022-02-24 01:14:45,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:45,972 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2022-02-24 01:14:45,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-24 01:14:45,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:45,972 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:45,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 01:14:45,973 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash 516489384, now seen corresponding path program 71 times [2022-02-24 01:14:45,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:45,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440979912] [2022-02-24 01:14:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:45,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:45,977 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:45,977 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:45,977 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:46,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:46,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:46,968 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:46,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440979912] [2022-02-24 01:14:46,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [440979912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:46,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:46,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 01:14:46,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076530200] [2022-02-24 01:14:46,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:46,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 01:14:46,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 01:14:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 01:14:46,970 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:48,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:48,515 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-02-24 01:14:48,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 01:14:48,516 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:14:48,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:48,518 INFO L225 Difference]: With dead ends: 164 [2022-02-24 01:14:48,518 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 01:14:48,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 01:14:48,519 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 152 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:48,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 54 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:48,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 01:14:48,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-02-24 01:14:48,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:48,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2022-02-24 01:14:48,553 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2022-02-24 01:14:48,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:48,553 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2022-02-24 01:14:48,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:48,553 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2022-02-24 01:14:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-02-24 01:14:48,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:48,554 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:48,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 01:14:48,554 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:48,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1550971594, now seen corresponding path program 72 times [2022-02-24 01:14:48,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:48,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425274978] [2022-02-24 01:14:48,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:48,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:48,559 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:48,559 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:48,559 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:48,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:49,618 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:49,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425274978] [2022-02-24 01:14:49,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [425274978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:49,618 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:49,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-24 01:14:49,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924144791] [2022-02-24 01:14:49,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:49,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-24 01:14:49,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-24 01:14:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 01:14:49,620 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:50,925 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-02-24 01:14:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-24 01:14:50,925 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2022-02-24 01:14:50,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:50,926 INFO L225 Difference]: With dead ends: 166 [2022-02-24 01:14:50,926 INFO L226 Difference]: Without dead ends: 160 [2022-02-24 01:14:50,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 01:14:50,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:50,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 29 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:50,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-24 01:14:50,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-02-24 01:14:50,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:50,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2022-02-24 01:14:50,961 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2022-02-24 01:14:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:50,961 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2022-02-24 01:14:50,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2022-02-24 01:14:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-24 01:14:50,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:50,962 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:50,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 01:14:50,962 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:50,963 INFO L85 PathProgramCache]: Analyzing trace with hash -744037268, now seen corresponding path program 73 times [2022-02-24 01:14:50,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:50,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802427321] [2022-02-24 01:14:50,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:50,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:50,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:50,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:50,967 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:52,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:52,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:52,037 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:52,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802427321] [2022-02-24 01:14:52,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1802427321] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:52,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:52,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 01:14:52,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241939487] [2022-02-24 01:14:52,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:52,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 01:14:52,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:52,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 01:14:52,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-02-24 01:14:52,039 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:53,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:53,466 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-02-24 01:14:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 01:14:53,466 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-02-24 01:14:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:53,467 INFO L225 Difference]: With dead ends: 168 [2022-02-24 01:14:53,467 INFO L226 Difference]: Without dead ends: 162 [2022-02-24 01:14:53,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 01:14:53,468 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:53,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 39 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:53,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-24 01:14:53,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2022-02-24 01:14:53,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:53,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2022-02-24 01:14:53,503 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2022-02-24 01:14:53,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:53,503 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2022-02-24 01:14:53,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:53,503 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2022-02-24 01:14:53,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-24 01:14:53,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:53,504 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:53,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 01:14:53,505 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1365636494, now seen corresponding path program 74 times [2022-02-24 01:14:53,505 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:53,505 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785723305] [2022-02-24 01:14:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:53,510 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:53,510 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:53,510 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:55,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:55,244 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:55,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785723305] [2022-02-24 01:14:55,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785723305] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:55,244 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:55,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 01:14:55,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836847721] [2022-02-24 01:14:55,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:55,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 01:14:55,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:55,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 01:14:55,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 01:14:55,245 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 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) [2022-02-24 01:14:56,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:56,771 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-02-24 01:14:56,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 01:14:56,771 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 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 [2022-02-24 01:14:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:56,772 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:14:56,772 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:14:56,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 01:14:56,773 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 158 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:56,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 54 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:14:56,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-02-24 01:14:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 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) [2022-02-24 01:14:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2022-02-24 01:14:56,836 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2022-02-24 01:14:56,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:56,836 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2022-02-24 01:14:56,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 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) [2022-02-24 01:14:56,836 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2022-02-24 01:14:56,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-02-24 01:14:56,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:56,837 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:56,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 01:14:56,837 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:56,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:56,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1537558064, now seen corresponding path program 75 times [2022-02-24 01:14:56,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:56,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537315944] [2022-02-24 01:14:56,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:56,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:56,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:56,842 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:56,842 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:57,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:57,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:57,938 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:57,938 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537315944] [2022-02-24 01:14:57,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1537315944] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:57,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:57,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 01:14:57,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575069137] [2022-02-24 01:14:57,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:57,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 01:14:57,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 01:14:57,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-02-24 01:14:57,939 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:59,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:59,424 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2022-02-24 01:14:59,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 01:14:59,424 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2022-02-24 01:14:59,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:59,425 INFO L225 Difference]: With dead ends: 172 [2022-02-24 01:14:59,425 INFO L226 Difference]: Without dead ends: 166 [2022-02-24 01:14:59,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-02-24 01:14:59,426 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 160 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:59,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 44 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:14:59,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-24 01:14:59,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-02-24 01:14:59,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 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) [2022-02-24 01:14:59,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2022-02-24 01:14:59,464 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2022-02-24 01:14:59,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:59,464 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2022-02-24 01:14:59,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:59,464 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2022-02-24 01:14:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-24 01:14:59,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:59,464 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:59,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 01:14:59,465 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:59,465 INFO L85 PathProgramCache]: Analyzing trace with hash -749537710, now seen corresponding path program 76 times [2022-02-24 01:14:59,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:59,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349492004] [2022-02-24 01:14:59,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:59,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:59,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:59,470 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:59,470 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:00,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:00,853 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:00,853 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349492004] [2022-02-24 01:15:00,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349492004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:00,853 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:00,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-24 01:15:00,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743813613] [2022-02-24 01:15:00,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:00,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-24 01:15:00,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-24 01:15:00,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 01:15:00,855 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:02,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:02,300 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2022-02-24 01:15:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-24 01:15:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:15:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:02,301 INFO L225 Difference]: With dead ends: 174 [2022-02-24 01:15:02,301 INFO L226 Difference]: Without dead ends: 168 [2022-02-24 01:15:02,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-02-24 01:15:02,303 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:02,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 24 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:02,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-24 01:15:02,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2022-02-24 01:15:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:02,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2022-02-24 01:15:02,340 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2022-02-24 01:15:02,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:02,340 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2022-02-24 01:15:02,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2022-02-24 01:15:02,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-02-24 01:15:02,341 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:02,341 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:02,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 01:15:02,341 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:02,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:02,341 INFO L85 PathProgramCache]: Analyzing trace with hash 374679028, now seen corresponding path program 77 times [2022-02-24 01:15:02,341 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:02,341 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334208641] [2022-02-24 01:15:02,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:02,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:02,346 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:02,346 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:02,347 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:03,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:03,874 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:03,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334208641] [2022-02-24 01:15:03,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1334208641] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:03,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:03,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 01:15:03,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454253279] [2022-02-24 01:15:03,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:03,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 01:15:03,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:03,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 01:15:03,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 01:15:03,876 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:05,526 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2022-02-24 01:15:05,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 01:15:05,527 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-02-24 01:15:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:05,527 INFO L225 Difference]: With dead ends: 176 [2022-02-24 01:15:05,527 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 01:15:05,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 01:15:05,529 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 164 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:05,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 39 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:05,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 01:15:05,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-02-24 01:15:05,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:05,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2022-02-24 01:15:05,569 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2022-02-24 01:15:05,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:05,569 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2022-02-24 01:15:05,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:05,569 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2022-02-24 01:15:05,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-02-24 01:15:05,570 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:05,570 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:05,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 01:15:05,570 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:05,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:05,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1584794346, now seen corresponding path program 78 times [2022-02-24 01:15:05,570 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:05,570 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053252002] [2022-02-24 01:15:05,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:05,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:05,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:05,575 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:05,575 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:05,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:07,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:07,165 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:07,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053252002] [2022-02-24 01:15:07,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053252002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:07,165 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:07,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-24 01:15:07,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365048802] [2022-02-24 01:15:07,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:07,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-24 01:15:07,166 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:07,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-24 01:15:07,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 01:15:07,188 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:09,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:09,601 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2022-02-24 01:15:09,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-24 01:15:09,602 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2022-02-24 01:15:09,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:09,602 INFO L225 Difference]: With dead ends: 178 [2022-02-24 01:15:09,602 INFO L226 Difference]: Without dead ends: 172 [2022-02-24 01:15:09,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 01:15:09,605 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 166 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:09,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 49 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:09,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-02-24 01:15:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-02-24 01:15:09,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2022-02-24 01:15:09,656 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2022-02-24 01:15:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:09,656 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2022-02-24 01:15:09,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2022-02-24 01:15:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-24 01:15:09,657 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:09,657 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:09,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 01:15:09,657 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash 851936184, now seen corresponding path program 79 times [2022-02-24 01:15:09,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:09,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624724346] [2022-02-24 01:15:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:09,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:09,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:09,664 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:09,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:11,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:11,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:11,432 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:11,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624724346] [2022-02-24 01:15:11,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624724346] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:11,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:11,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 01:15:11,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618391] [2022-02-24 01:15:11,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:11,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 01:15:11,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 01:15:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-02-24 01:15:11,435 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:13,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:13,054 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2022-02-24 01:15:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 01:15:13,054 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-02-24 01:15:13,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:13,055 INFO L225 Difference]: With dead ends: 180 [2022-02-24 01:15:13,055 INFO L226 Difference]: Without dead ends: 174 [2022-02-24 01:15:13,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-02-24 01:15:13,056 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:13,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 44 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:13,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-24 01:15:13,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2022-02-24 01:15:13,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:13,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2022-02-24 01:15:13,098 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2022-02-24 01:15:13,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:13,099 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2022-02-24 01:15:13,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:13,099 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2022-02-24 01:15:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-02-24 01:15:13,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:13,099 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:13,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 01:15:13,100 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:13,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:13,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1792799194, now seen corresponding path program 80 times [2022-02-24 01:15:13,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:13,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342079839] [2022-02-24 01:15:13,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:13,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:13,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:13,106 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:13,106 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:13,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:15,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:15,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:15,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:15,076 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:15,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342079839] [2022-02-24 01:15:15,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342079839] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:15,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:15,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 01:15:15,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902508729] [2022-02-24 01:15:15,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:15,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 01:15:15,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:15,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 01:15:15,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 01:15:15,078 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:17,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:17,622 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2022-02-24 01:15:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 01:15:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:15:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:17,623 INFO L225 Difference]: With dead ends: 182 [2022-02-24 01:15:17,623 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 01:15:17,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 01:15:17,625 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 170 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:17,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 44 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:15:17,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 01:15:17,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-02-24 01:15:17,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 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) [2022-02-24 01:15:17,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2022-02-24 01:15:17,667 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2022-02-24 01:15:17,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:17,667 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2022-02-24 01:15:17,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:17,667 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2022-02-24 01:15:17,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-02-24 01:15:17,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:17,671 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:17,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 01:15:17,671 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:17,671 INFO L85 PathProgramCache]: Analyzing trace with hash -275947652, now seen corresponding path program 81 times [2022-02-24 01:15:17,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:17,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935789627] [2022-02-24 01:15:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:17,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:17,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:17,679 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:17,679 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:17,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:19,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:19,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:19,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935789627] [2022-02-24 01:15:19,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [935789627] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:19,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:19,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 01:15:19,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50086545] [2022-02-24 01:15:19,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:19,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 01:15:19,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:19,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 01:15:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-02-24 01:15:19,272 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:20,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:20,937 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2022-02-24 01:15:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 01:15:20,937 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:15:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:20,938 INFO L225 Difference]: With dead ends: 184 [2022-02-24 01:15:20,938 INFO L226 Difference]: Without dead ends: 178 [2022-02-24 01:15:20,940 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-02-24 01:15:20,940 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 172 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:20,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 39 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-24 01:15:21,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-02-24 01:15:21,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 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) [2022-02-24 01:15:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2022-02-24 01:15:21,006 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2022-02-24 01:15:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:21,006 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2022-02-24 01:15:21,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:21,006 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2022-02-24 01:15:21,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-24 01:15:21,007 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:21,007 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 01:15:21,007 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:21,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:21,007 INFO L85 PathProgramCache]: Analyzing trace with hash 228191390, now seen corresponding path program 82 times [2022-02-24 01:15:21,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:21,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103345517] [2022-02-24 01:15:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:21,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:21,012 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:21,013 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:21,013 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:22,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:22,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:22,364 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:22,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103345517] [2022-02-24 01:15:22,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1103345517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:22,364 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:22,364 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-24 01:15:22,364 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616927289] [2022-02-24 01:15:22,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:22,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-24 01:15:22,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-24 01:15:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 01:15:22,367 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:24,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:24,054 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2022-02-24 01:15:24,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-02-24 01:15:24,054 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-02-24 01:15:24,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:24,055 INFO L225 Difference]: With dead ends: 186 [2022-02-24 01:15:24,055 INFO L226 Difference]: Without dead ends: 180 [2022-02-24 01:15:24,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-02-24 01:15:24,056 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:24,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 29 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:24,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-24 01:15:24,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2022-02-24 01:15:24,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:24,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2022-02-24 01:15:24,099 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2022-02-24 01:15:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:24,100 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2022-02-24 01:15:24,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2022-02-24 01:15:24,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-02-24 01:15:24,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:24,100 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:24,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 01:15:24,101 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:24,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:24,101 INFO L85 PathProgramCache]: Analyzing trace with hash -625493696, now seen corresponding path program 83 times [2022-02-24 01:15:24,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:24,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091574328] [2022-02-24 01:15:24,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:24,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:24,106 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:24,106 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:24,106 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:25,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:25,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:25,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:25,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:25,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091574328] [2022-02-24 01:15:25,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2091574328] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:25,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:25,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 01:15:25,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825043786] [2022-02-24 01:15:25,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:25,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 01:15:25,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:25,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 01:15:25,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 01:15:25,436 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:27,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:27,238 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2022-02-24 01:15:27,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 01:15:27,238 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-02-24 01:15:27,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:27,239 INFO L225 Difference]: With dead ends: 188 [2022-02-24 01:15:27,239 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:15:27,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 01:15:27,242 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 176 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:27,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 39 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:15:27,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-02-24 01:15:27,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2022-02-24 01:15:27,308 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2022-02-24 01:15:27,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:27,308 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2022-02-24 01:15:27,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2022-02-24 01:15:27,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-02-24 01:15:27,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:27,309 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:27,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 01:15:27,309 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:27,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:27,310 INFO L85 PathProgramCache]: Analyzing trace with hash -678107806, now seen corresponding path program 84 times [2022-02-24 01:15:27,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:27,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20235508] [2022-02-24 01:15:27,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:27,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:27,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:27,316 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:27,316 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:28,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:28,825 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:28,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20235508] [2022-02-24 01:15:28,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [20235508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:28,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:28,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-24 01:15:28,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993085609] [2022-02-24 01:15:28,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:28,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-24 01:15:28,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:28,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-24 01:15:28,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 01:15:28,829 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:30,670 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2022-02-24 01:15:30,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-24 01:15:30,671 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-02-24 01:15:30,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:30,672 INFO L225 Difference]: With dead ends: 190 [2022-02-24 01:15:30,672 INFO L226 Difference]: Without dead ends: 184 [2022-02-24 01:15:30,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-02-24 01:15:30,674 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:30,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 54 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:30,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-24 01:15:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-02-24 01:15:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2022-02-24 01:15:30,721 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2022-02-24 01:15:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:30,721 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2022-02-24 01:15:30,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2022-02-24 01:15:30,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-24 01:15:30,748 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:30,748 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:30,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 01:15:30,748 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash 299340036, now seen corresponding path program 85 times [2022-02-24 01:15:30,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:30,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521797612] [2022-02-24 01:15:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:30,766 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:30,767 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:30,767 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:32,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:32,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:32,123 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:32,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521797612] [2022-02-24 01:15:32,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1521797612] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:32,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:32,123 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-02-24 01:15:32,123 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513578121] [2022-02-24 01:15:32,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:32,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-02-24 01:15:32,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:32,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-02-24 01:15:32,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-02-24 01:15:32,126 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:34,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:34,595 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2022-02-24 01:15:34,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-24 01:15:34,595 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:15:34,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:34,596 INFO L225 Difference]: With dead ends: 192 [2022-02-24 01:15:34,596 INFO L226 Difference]: Without dead ends: 186 [2022-02-24 01:15:34,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-02-24 01:15:34,598 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:34,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 44 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:15:34,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-24 01:15:34,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2022-02-24 01:15:34,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 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) [2022-02-24 01:15:34,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2022-02-24 01:15:34,661 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2022-02-24 01:15:34,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:34,661 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2022-02-24 01:15:34,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:34,661 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2022-02-24 01:15:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-02-24 01:15:34,671 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:34,671 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:34,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 01:15:34,671 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:34,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:34,671 INFO L85 PathProgramCache]: Analyzing trace with hash -971121626, now seen corresponding path program 86 times [2022-02-24 01:15:34,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:34,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405395636] [2022-02-24 01:15:34,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:34,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:34,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:34,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:34,678 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:37,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:37,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:37,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:37,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:37,056 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405395636] [2022-02-24 01:15:37,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405395636] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:37,056 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:37,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 01:15:37,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626872768] [2022-02-24 01:15:37,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:37,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 01:15:37,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:37,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 01:15:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 01:15:37,058 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:39,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:39,233 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2022-02-24 01:15:39,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 01:15:39,233 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:15:39,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:39,234 INFO L225 Difference]: With dead ends: 194 [2022-02-24 01:15:39,234 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 01:15:39,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 01:15:39,235 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 182 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:39,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 44 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:39,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 01:15:39,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-02-24 01:15:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2022-02-24 01:15:39,298 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2022-02-24 01:15:39,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:39,298 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2022-02-24 01:15:39,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:39,298 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2022-02-24 01:15:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-02-24 01:15:39,299 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:39,299 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:39,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 01:15:39,299 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:39,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:39,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2114066744, now seen corresponding path program 87 times [2022-02-24 01:15:39,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:39,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164211961] [2022-02-24 01:15:39,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:39,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:39,305 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:39,305 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:39,305 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:39,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:40,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:40,787 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:40,787 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164211961] [2022-02-24 01:15:40,787 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164211961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:40,787 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:40,787 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-02-24 01:15:40,787 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388820019] [2022-02-24 01:15:40,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:40,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-02-24 01:15:40,787 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:40,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-02-24 01:15:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 01:15:40,789 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:42,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:42,652 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2022-02-24 01:15:42,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-24 01:15:42,653 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2022-02-24 01:15:42,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:42,653 INFO L225 Difference]: With dead ends: 196 [2022-02-24 01:15:42,653 INFO L226 Difference]: Without dead ends: 190 [2022-02-24 01:15:42,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-02-24 01:15:42,657 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 184 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:42,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 29 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:42,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-24 01:15:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-02-24 01:15:42,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:42,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2022-02-24 01:15:42,715 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2022-02-24 01:15:42,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:42,715 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2022-02-24 01:15:42,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2022-02-24 01:15:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-02-24 01:15:42,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:42,716 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:42,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 01:15:42,716 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:42,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:42,716 INFO L85 PathProgramCache]: Analyzing trace with hash -972697366, now seen corresponding path program 88 times [2022-02-24 01:15:42,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:42,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [725890359] [2022-02-24 01:15:42,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:42,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:42,722 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:42,722 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:42,722 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:42,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:44,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:44,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:44,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:44,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:44,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [725890359] [2022-02-24 01:15:44,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [725890359] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:44,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:44,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-24 01:15:44,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541855344] [2022-02-24 01:15:44,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:44,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-24 01:15:44,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:44,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-24 01:15:44,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-02-24 01:15:44,203 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:46,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:46,074 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2022-02-24 01:15:46,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 01:15:46,075 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-02-24 01:15:46,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:46,075 INFO L225 Difference]: With dead ends: 198 [2022-02-24 01:15:46,075 INFO L226 Difference]: Without dead ends: 192 [2022-02-24 01:15:46,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-02-24 01:15:46,078 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:46,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 54 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-24 01:15:46,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2022-02-24 01:15:46,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 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) [2022-02-24 01:15:46,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2022-02-24 01:15:46,136 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2022-02-24 01:15:46,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:46,136 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2022-02-24 01:15:46,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:46,137 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2022-02-24 01:15:46,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-02-24 01:15:46,137 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:46,137 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:46,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-24 01:15:46,137 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:46,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:46,138 INFO L85 PathProgramCache]: Analyzing trace with hash 666614412, now seen corresponding path program 89 times [2022-02-24 01:15:46,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:46,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347823757] [2022-02-24 01:15:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:46,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:46,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:46,144 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:46,144 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:47,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:47,637 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:47,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347823757] [2022-02-24 01:15:47,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [347823757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:47,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:47,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 01:15:47,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632211429] [2022-02-24 01:15:47,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:47,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 01:15:47,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:47,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 01:15:47,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 01:15:47,639 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:50,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:50,714 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2022-02-24 01:15:50,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 01:15:50,714 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-02-24 01:15:50,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:50,715 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:15:50,715 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 01:15:50,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 01:15:50,718 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 188 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:50,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 39 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:15:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 01:15:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-02-24 01:15:50,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 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) [2022-02-24 01:15:50,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2022-02-24 01:15:50,776 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2022-02-24 01:15:50,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:50,777 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2022-02-24 01:15:50,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:50,777 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2022-02-24 01:15:50,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-02-24 01:15:50,777 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:50,778 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:50,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-24 01:15:50,778 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:50,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:50,778 INFO L85 PathProgramCache]: Analyzing trace with hash -207764562, now seen corresponding path program 90 times [2022-02-24 01:15:50,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:50,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471429786] [2022-02-24 01:15:50,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:50,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:50,784 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:50,784 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:50,784 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:52,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:52,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:52,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:52,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471429786] [2022-02-24 01:15:52,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471429786] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:52,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:52,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-24 01:15:52,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304150355] [2022-02-24 01:15:52,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:52,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-24 01:15:52,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:52,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-24 01:15:52,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-02-24 01:15:52,906 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:54,910 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2022-02-24 01:15:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 01:15:54,911 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:15:54,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:54,911 INFO L225 Difference]: With dead ends: 202 [2022-02-24 01:15:54,911 INFO L226 Difference]: Without dead ends: 196 [2022-02-24 01:15:54,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-02-24 01:15:54,914 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 190 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:54,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 34 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:54,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-02-24 01:15:54,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-02-24 01:15:54,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:54,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2022-02-24 01:15:54,974 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2022-02-24 01:15:54,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:54,974 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2022-02-24 01:15:54,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:54,975 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2022-02-24 01:15:54,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-02-24 01:15:54,975 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:54,975 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:54,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-24 01:15:54,975 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:54,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:54,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1327631440, now seen corresponding path program 91 times [2022-02-24 01:15:54,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:54,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [916998031] [2022-02-24 01:15:54,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:54,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:54,981 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:54,982 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:54,982 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:55,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:56,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:56,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:56,558 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:56,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [916998031] [2022-02-24 01:15:56,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [916998031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:56,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:56,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-02-24 01:15:56,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31332389] [2022-02-24 01:15:56,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:56,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-02-24 01:15:56,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-02-24 01:15:56,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 01:15:56,561 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:58,589 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2022-02-24 01:15:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-24 01:15:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:15:58,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:58,590 INFO L225 Difference]: With dead ends: 204 [2022-02-24 01:15:58,590 INFO L226 Difference]: Without dead ends: 198 [2022-02-24 01:15:58,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-02-24 01:15:58,593 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:58,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 44 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:15:58,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-24 01:15:58,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2022-02-24 01:15:58,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:58,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2022-02-24 01:15:58,654 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2022-02-24 01:15:58,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:58,654 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2022-02-24 01:15:58,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2022-02-24 01:15:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-02-24 01:15:58,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:58,655 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:58,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-24 01:15:58,655 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:58,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:58,655 INFO L85 PathProgramCache]: Analyzing trace with hash -625560462, now seen corresponding path program 92 times [2022-02-24 01:15:58,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:58,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301418623] [2022-02-24 01:15:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:58,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:58,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:58,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:58,662 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:58,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:01,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:01,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:01,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:01,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:01,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301418623] [2022-02-24 01:16:01,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [301418623] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:01,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:01,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 01:16:01,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321968150] [2022-02-24 01:16:01,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:01,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 01:16:01,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:01,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 01:16:01,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 01:16:01,249 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:04,060 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2022-02-24 01:16:04,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 01:16:04,061 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-02-24 01:16:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:04,061 INFO L225 Difference]: With dead ends: 206 [2022-02-24 01:16:04,061 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:16:04,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 01:16:04,065 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 194 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:04,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 49 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:16:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:16:04,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-02-24 01:16:04,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:04,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2022-02-24 01:16:04,141 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2022-02-24 01:16:04,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:04,141 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2022-02-24 01:16:04,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:04,141 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2022-02-24 01:16:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-02-24 01:16:04,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:04,142 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:04,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-24 01:16:04,142 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:04,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:04,142 INFO L85 PathProgramCache]: Analyzing trace with hash -742269932, now seen corresponding path program 93 times [2022-02-24 01:16:04,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:04,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [298011574] [2022-02-24 01:16:04,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:04,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:04,148 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:04,149 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:04,149 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:06,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:06,664 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:06,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [298011574] [2022-02-24 01:16:06,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [298011574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:06,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:06,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-02-24 01:16:06,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735976076] [2022-02-24 01:16:06,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:06,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-02-24 01:16:06,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:06,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-02-24 01:16:06,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 01:16:06,667 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:09,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:09,099 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2022-02-24 01:16:09,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-24 01:16:09,099 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-02-24 01:16:09,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:09,100 INFO L225 Difference]: With dead ends: 208 [2022-02-24 01:16:09,100 INFO L226 Difference]: Without dead ends: 202 [2022-02-24 01:16:09,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-02-24 01:16:09,101 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 196 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:09,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 29 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:16:09,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-02-24 01:16:09,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-02-24 01:16:09,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2022-02-24 01:16:09,156 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2022-02-24 01:16:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:09,156 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2022-02-24 01:16:09,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2022-02-24 01:16:09,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-24 01:16:09,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:09,157 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:09,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-24 01:16:09,157 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:09,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:09,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1230920906, now seen corresponding path program 94 times [2022-02-24 01:16:09,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:09,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062182184] [2022-02-24 01:16:09,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:09,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:09,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:09,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:09,170 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:10,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:10,998 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:10,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062182184] [2022-02-24 01:16:10,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2062182184] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:10,998 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:10,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-24 01:16:10,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402623195] [2022-02-24 01:16:10,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:10,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-24 01:16:10,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-24 01:16:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 01:16:10,999 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:13,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:13,161 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2022-02-24 01:16:13,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-24 01:16:13,162 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-02-24 01:16:13,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:13,162 INFO L225 Difference]: With dead ends: 210 [2022-02-24 01:16:13,162 INFO L226 Difference]: Without dead ends: 204 [2022-02-24 01:16:13,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-02-24 01:16:13,164 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:13,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 39 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:16:13,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-24 01:16:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-02-24 01:16:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2022-02-24 01:16:13,221 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2022-02-24 01:16:13,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:13,222 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2022-02-24 01:16:13,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2022-02-24 01:16:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-02-24 01:16:13,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:13,222 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:13,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-02-24 01:16:13,223 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:13,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1621895640, now seen corresponding path program 95 times [2022-02-24 01:16:13,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:13,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [7637596] [2022-02-24 01:16:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:13,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:13,231 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:13,231 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:13,231 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:14,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:14,948 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:14,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [7637596] [2022-02-24 01:16:14,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [7637596] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:14,949 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:14,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 01:16:14,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598799271] [2022-02-24 01:16:14,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:14,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 01:16:14,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:14,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 01:16:14,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 01:16:14,951 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:17,135 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2022-02-24 01:16:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 01:16:17,136 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:16:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:17,136 INFO L225 Difference]: With dead ends: 212 [2022-02-24 01:16:17,136 INFO L226 Difference]: Without dead ends: 206 [2022-02-24 01:16:17,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-02-24 01:16:17,138 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 200 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:17,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 29 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:16:17,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-24 01:16:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-02-24 01:16:17,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.005) internal successors, (201), 200 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) [2022-02-24 01:16:17,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2022-02-24 01:16:17,207 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2022-02-24 01:16:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:17,208 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2022-02-24 01:16:17,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2022-02-24 01:16:17,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-24 01:16:17,209 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:17,209 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:17,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-02-24 01:16:17,209 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:17,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:17,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1305505798, now seen corresponding path program 96 times [2022-02-24 01:16:17,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:17,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211618354] [2022-02-24 01:16:17,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:17,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:17,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:17,217 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:17,217 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:18,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:18,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:18,957 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:18,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211618354] [2022-02-24 01:16:18,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1211618354] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:18,958 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:18,958 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-24 01:16:18,958 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163357283] [2022-02-24 01:16:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:18,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-24 01:16:18,958 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:18,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-24 01:16:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 01:16:18,960 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:21,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:21,203 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2022-02-24 01:16:21,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-02-24 01:16:21,204 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:16:21,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:21,204 INFO L225 Difference]: With dead ends: 214 [2022-02-24 01:16:21,205 INFO L226 Difference]: Without dead ends: 208 [2022-02-24 01:16:21,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-02-24 01:16:21,207 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 202 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:21,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 29 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:16:21,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-02-24 01:16:21,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-02-24 01:16:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 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) [2022-02-24 01:16:21,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2022-02-24 01:16:21,266 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2022-02-24 01:16:21,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:21,266 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2022-02-24 01:16:21,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:21,266 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2022-02-24 01:16:21,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-02-24 01:16:21,267 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:21,267 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:21,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-02-24 01:16:21,267 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:21,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1334708836, now seen corresponding path program 97 times [2022-02-24 01:16:21,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:21,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709403967] [2022-02-24 01:16:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:21,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:21,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:21,274 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:21,274 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:23,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:23,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:23,032 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:23,032 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709403967] [2022-02-24 01:16:23,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1709403967] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:23,032 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:23,032 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-24 01:16:23,032 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480971572] [2022-02-24 01:16:23,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:23,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-24 01:16:23,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:23,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-24 01:16:23,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-02-24 01:16:23,035 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:25,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:25,336 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2022-02-24 01:16:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-24 01:16:25,336 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-02-24 01:16:25,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:25,337 INFO L225 Difference]: With dead ends: 216 [2022-02-24 01:16:25,337 INFO L226 Difference]: Without dead ends: 210 [2022-02-24 01:16:25,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-02-24 01:16:25,338 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:25,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 29 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:16:25,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-24 01:16:25,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2022-02-24 01:16:25,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:25,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2022-02-24 01:16:25,398 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2022-02-24 01:16:25,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:25,398 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2022-02-24 01:16:25,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:25,398 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2022-02-24 01:16:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-02-24 01:16:25,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:25,399 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:25,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-02-24 01:16:25,399 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:25,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:25,399 INFO L85 PathProgramCache]: Analyzing trace with hash 665942718, now seen corresponding path program 98 times [2022-02-24 01:16:25,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:25,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946252731] [2022-02-24 01:16:25,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:25,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:25,406 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:25,406 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:25,406 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:28,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:28,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:28,463 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:28,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946252731] [2022-02-24 01:16:28,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946252731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:28,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:28,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 01:16:28,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442729378] [2022-02-24 01:16:28,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:28,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 01:16:28,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:28,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 01:16:28,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 01:16:28,465 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:31,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:31,652 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2022-02-24 01:16:31,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 01:16:31,652 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-02-24 01:16:31,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:31,652 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:16:31,653 INFO L226 Difference]: Without dead ends: 212 [2022-02-24 01:16:31,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-02-24 01:16:31,655 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:31,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 54 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:16:31,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-24 01:16:31,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-02-24 01:16:31,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:31,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2022-02-24 01:16:31,716 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2022-02-24 01:16:31,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:31,716 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2022-02-24 01:16:31,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:31,717 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2022-02-24 01:16:31,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-02-24 01:16:31,717 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:31,717 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:31,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-02-24 01:16:31,717 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:31,718 INFO L85 PathProgramCache]: Analyzing trace with hash -853262496, now seen corresponding path program 99 times [2022-02-24 01:16:31,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:31,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484643521] [2022-02-24 01:16:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:31,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:31,725 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:31,725 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:33,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:33,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:33,825 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:33,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484643521] [2022-02-24 01:16:33,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [484643521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:33,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:33,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-24 01:16:33,825 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971910867] [2022-02-24 01:16:33,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:33,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-24 01:16:33,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:33,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-24 01:16:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-02-24 01:16:33,828 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 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) [2022-02-24 01:16:36,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:36,567 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2022-02-24 01:16:36,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-24 01:16:36,567 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 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 [2022-02-24 01:16:36,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:36,568 INFO L225 Difference]: With dead ends: 220 [2022-02-24 01:16:36,568 INFO L226 Difference]: Without dead ends: 214 [2022-02-24 01:16:36,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-02-24 01:16:36,571 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 208 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:36,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 79 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:16:36,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-02-24 01:16:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-02-24 01:16:36,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:36,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2022-02-24 01:16:36,643 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2022-02-24 01:16:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:36,644 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2022-02-24 01:16:36,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 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) [2022-02-24 01:16:36,644 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2022-02-24 01:16:36,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-02-24 01:16:36,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:36,645 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:36,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-02-24 01:16:36,645 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:36,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:36,645 INFO L85 PathProgramCache]: Analyzing trace with hash -520592510, now seen corresponding path program 100 times [2022-02-24 01:16:36,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:36,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485627566] [2022-02-24 01:16:36,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:36,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:36,652 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:36,652 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:36,652 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:38,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:38,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:38,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:38,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:38,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485627566] [2022-02-24 01:16:38,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485627566] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:38,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:38,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-24 01:16:38,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179727852] [2022-02-24 01:16:38,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:38,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-24 01:16:38,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-24 01:16:38,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 01:16:38,698 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:41,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:41,392 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2022-02-24 01:16:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-24 01:16:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:16:41,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:41,393 INFO L225 Difference]: With dead ends: 222 [2022-02-24 01:16:41,393 INFO L226 Difference]: Without dead ends: 216 [2022-02-24 01:16:41,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-02-24 01:16:41,396 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:41,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 54 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:16:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-24 01:16:41,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2022-02-24 01:16:41,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 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) [2022-02-24 01:16:41,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2022-02-24 01:16:41,464 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2022-02-24 01:16:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:41,464 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2022-02-24 01:16:41,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:41,465 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2022-02-24 01:16:41,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-02-24 01:16:41,465 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:41,465 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:41,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-02-24 01:16:41,465 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:41,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:41,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1347684132, now seen corresponding path program 101 times [2022-02-24 01:16:41,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:41,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467532366] [2022-02-24 01:16:41,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:41,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:41,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:41,475 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:41,476 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:43,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:43,574 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:43,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467532366] [2022-02-24 01:16:43,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [467532366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:43,574 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:43,574 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 01:16:43,574 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272471206] [2022-02-24 01:16:43,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:43,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 01:16:43,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:43,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 01:16:43,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 01:16:43,576 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:46,300 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2022-02-24 01:16:46,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 01:16:46,300 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:16:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:46,301 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:16:46,301 INFO L226 Difference]: Without dead ends: 218 [2022-02-24 01:16:46,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-02-24 01:16:46,304 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 212 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:46,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 29 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:16:46,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-24 01:16:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-02-24 01:16:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2022-02-24 01:16:46,378 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2022-02-24 01:16:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:46,378 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2022-02-24 01:16:46,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2022-02-24 01:16:46,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-02-24 01:16:46,392 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:46,392 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:46,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-02-24 01:16:46,392 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:46,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1465207366, now seen corresponding path program 102 times [2022-02-24 01:16:46,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:46,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383990741] [2022-02-24 01:16:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:46,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:46,408 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:46,408 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:48,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:48,557 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:48,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383990741] [2022-02-24 01:16:48,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383990741] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:48,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:48,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-24 01:16:48,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23319055] [2022-02-24 01:16:48,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:48,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-24 01:16:48,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:48,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-24 01:16:48,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 01:16:48,560 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:51,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:51,252 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2022-02-24 01:16:51,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-02-24 01:16:51,253 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2022-02-24 01:16:51,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:51,253 INFO L225 Difference]: With dead ends: 226 [2022-02-24 01:16:51,253 INFO L226 Difference]: Without dead ends: 220 [2022-02-24 01:16:51,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-02-24 01:16:51,271 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 214 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:51,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 24 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:16:51,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-24 01:16:51,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-02-24 01:16:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 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) [2022-02-24 01:16:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2022-02-24 01:16:51,338 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2022-02-24 01:16:51,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:51,338 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2022-02-24 01:16:51,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2022-02-24 01:16:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-02-24 01:16:51,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:51,339 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:51,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-02-24 01:16:51,339 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:51,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1559081752, now seen corresponding path program 103 times [2022-02-24 01:16:51,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:51,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721164128] [2022-02-24 01:16:51,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:51,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:51,346 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:51,347 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:51,347 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:53,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:53,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:53,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:53,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721164128] [2022-02-24 01:16:53,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1721164128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:53,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:53,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 01:16:53,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56878917] [2022-02-24 01:16:53,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:53,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 01:16:53,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:53,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 01:16:53,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-02-24 01:16:53,603 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:56,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:56,471 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2022-02-24 01:16:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 01:16:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-02-24 01:16:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:56,472 INFO L225 Difference]: With dead ends: 228 [2022-02-24 01:16:56,472 INFO L226 Difference]: Without dead ends: 222 [2022-02-24 01:16:56,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-02-24 01:16:56,475 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 216 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:56,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 49 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:16:56,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-24 01:16:56,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2022-02-24 01:16:56,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 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) [2022-02-24 01:16:56,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2022-02-24 01:16:56,554 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2022-02-24 01:16:56,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:56,554 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2022-02-24 01:16:56,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:56,555 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2022-02-24 01:16:56,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-02-24 01:16:56,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:56,557 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:56,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-02-24 01:16:56,557 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:56,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:56,557 INFO L85 PathProgramCache]: Analyzing trace with hash -208064758, now seen corresponding path program 104 times [2022-02-24 01:16:56,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:56,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655868854] [2022-02-24 01:16:56,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:56,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:56,567 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:56,567 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:56,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:58,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:58,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:58,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:58,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655868854] [2022-02-24 01:16:58,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655868854] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:58,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:58,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-24 01:16:58,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289992927] [2022-02-24 01:16:58,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:58,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-24 01:16:58,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:58,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-24 01:16:58,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 01:16:58,870 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 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) [2022-02-24 01:17:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:01,500 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2022-02-24 01:17:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-24 01:17:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 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 [2022-02-24 01:17:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:01,501 INFO L225 Difference]: With dead ends: 230 [2022-02-24 01:17:01,501 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:17:01,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-02-24 01:17:01,503 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 218 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:01,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 34 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:01,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:17:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-02-24 01:17:01,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2022-02-24 01:17:01,571 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2022-02-24 01:17:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:01,571 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2022-02-24 01:17:01,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 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) [2022-02-24 01:17:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2022-02-24 01:17:01,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-02-24 01:17:01,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:01,572 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:01,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-02-24 01:17:01,572 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:01,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1039143084, now seen corresponding path program 105 times [2022-02-24 01:17:01,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:01,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512191374] [2022-02-24 01:17:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:01,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:01,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:01,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:01,581 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:03,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:03,638 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:03,638 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512191374] [2022-02-24 01:17:03,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [512191374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:03,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:03,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-24 01:17:03,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990462325] [2022-02-24 01:17:03,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:03,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-24 01:17:03,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:03,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-24 01:17:03,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 01:17:03,641 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:07,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:07,401 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2022-02-24 01:17:07,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-24 01:17:07,401 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:17:07,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:07,401 INFO L225 Difference]: With dead ends: 232 [2022-02-24 01:17:07,401 INFO L226 Difference]: Without dead ends: 226 [2022-02-24 01:17:07,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-02-24 01:17:07,403 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 220 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:07,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 44 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:17:07,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-02-24 01:17:07,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-02-24 01:17:07,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:07,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2022-02-24 01:17:07,473 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2022-02-24 01:17:07,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:07,473 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2022-02-24 01:17:07,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:07,473 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2022-02-24 01:17:07,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-24 01:17:07,474 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:07,474 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:07,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-02-24 01:17:07,474 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:07,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:07,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1310003662, now seen corresponding path program 106 times [2022-02-24 01:17:07,474 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:07,474 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572252006] [2022-02-24 01:17:07,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:07,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:07,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:07,482 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:07,482 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:07,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:09,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:09,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:09,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:09,657 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:09,657 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572252006] [2022-02-24 01:17:09,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [572252006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:09,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:09,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-24 01:17:09,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936552251] [2022-02-24 01:17:09,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:09,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-24 01:17:09,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:09,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-24 01:17:09,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 01:17:09,660 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:12,338 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2022-02-24 01:17:12,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-24 01:17:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-02-24 01:17:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:12,338 INFO L225 Difference]: With dead ends: 234 [2022-02-24 01:17:12,339 INFO L226 Difference]: Without dead ends: 228 [2022-02-24 01:17:12,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-02-24 01:17:12,341 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:12,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 29 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-24 01:17:12,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2022-02-24 01:17:12,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:12,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2022-02-24 01:17:12,459 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2022-02-24 01:17:12,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:12,460 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2022-02-24 01:17:12,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:12,460 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2022-02-24 01:17:12,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-02-24 01:17:12,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:12,461 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:12,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-02-24 01:17:12,461 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:12,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash -385985936, now seen corresponding path program 107 times [2022-02-24 01:17:12,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:12,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14810377] [2022-02-24 01:17:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:12,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:12,469 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:12,469 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:14,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:14,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:14,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14810377] [2022-02-24 01:17:14,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [14810377] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:14,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:14,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 01:17:14,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182794724] [2022-02-24 01:17:14,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:14,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 01:17:14,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:14,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 01:17:14,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 01:17:14,611 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:17,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:17,378 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2022-02-24 01:17:17,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 01:17:17,383 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2022-02-24 01:17:17,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:17,383 INFO L225 Difference]: With dead ends: 236 [2022-02-24 01:17:17,383 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 01:17:17,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-02-24 01:17:17,385 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 224 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:17,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 29 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:17,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 01:17:17,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-02-24 01:17:17,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:17,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2022-02-24 01:17:17,457 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2022-02-24 01:17:17,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:17,457 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2022-02-24 01:17:17,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:17,457 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2022-02-24 01:17:17,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-02-24 01:17:17,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:17,458 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:17,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-02-24 01:17:17,458 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:17,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:17,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1855582866, now seen corresponding path program 108 times [2022-02-24 01:17:17,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:17,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806328870] [2022-02-24 01:17:17,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:17,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:17,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:17,466 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:17,466 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:19,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:19,604 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:19,604 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806328870] [2022-02-24 01:17:19,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806328870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:19,604 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:19,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-24 01:17:19,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106890263] [2022-02-24 01:17:19,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:19,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-24 01:17:19,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:19,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-24 01:17:19,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 01:17:19,607 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:22,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:22,337 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2022-02-24 01:17:22,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-02-24 01:17:22,337 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2022-02-24 01:17:22,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:22,338 INFO L225 Difference]: With dead ends: 238 [2022-02-24 01:17:22,338 INFO L226 Difference]: Without dead ends: 232 [2022-02-24 01:17:22,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-02-24 01:17:22,340 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 226 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:22,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 24 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:22,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-02-24 01:17:22,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-02-24 01:17:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2022-02-24 01:17:22,413 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2022-02-24 01:17:22,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:22,414 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2022-02-24 01:17:22,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2022-02-24 01:17:22,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-02-24 01:17:22,414 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:22,414 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:22,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-02-24 01:17:22,414 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:22,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:22,415 INFO L85 PathProgramCache]: Analyzing trace with hash -70381004, now seen corresponding path program 109 times [2022-02-24 01:17:22,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:22,415 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610883050] [2022-02-24 01:17:22,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:22,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:22,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:22,422 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:22,423 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:22,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:25,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:25,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:25,236 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:25,236 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610883050] [2022-02-24 01:17:25,236 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [610883050] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:25,236 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:25,236 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-24 01:17:25,236 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167591059] [2022-02-24 01:17:25,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:25,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-24 01:17:25,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:25,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-24 01:17:25,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-02-24 01:17:25,240 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 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) [2022-02-24 01:17:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:28,074 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2022-02-24 01:17:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-24 01:17:28,074 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 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 [2022-02-24 01:17:28,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:28,075 INFO L225 Difference]: With dead ends: 240 [2022-02-24 01:17:28,075 INFO L226 Difference]: Without dead ends: 234 [2022-02-24 01:17:28,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-02-24 01:17:28,078 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 228 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:28,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 39 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:28,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-24 01:17:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2022-02-24 01:17:28,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2022-02-24 01:17:28,165 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2022-02-24 01:17:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:28,165 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2022-02-24 01:17:28,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 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) [2022-02-24 01:17:28,166 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2022-02-24 01:17:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-02-24 01:17:28,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:28,166 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:28,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-02-24 01:17:28,166 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:28,167 INFO L85 PathProgramCache]: Analyzing trace with hash 209244502, now seen corresponding path program 110 times [2022-02-24 01:17:28,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:28,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1623038431] [2022-02-24 01:17:28,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:28,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:28,174 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:28,175 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:28,175 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:30,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:30,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:30,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:30,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1623038431] [2022-02-24 01:17:30,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1623038431] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:30,354 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:30,354 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-24 01:17:30,354 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705226312] [2022-02-24 01:17:30,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:30,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-24 01:17:30,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-24 01:17:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 01:17:30,356 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:33,184 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2022-02-24 01:17:33,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-24 01:17:33,184 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:17:33,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:33,185 INFO L225 Difference]: With dead ends: 242 [2022-02-24 01:17:33,185 INFO L226 Difference]: Without dead ends: 236 [2022-02-24 01:17:33,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-02-24 01:17:33,187 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 230 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:33,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [230 Valid, 44 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:33,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-24 01:17:33,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-02-24 01:17:33,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 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) [2022-02-24 01:17:33,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2022-02-24 01:17:33,263 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2022-02-24 01:17:33,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:33,263 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2022-02-24 01:17:33,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:33,263 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2022-02-24 01:17:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-02-24 01:17:33,264 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:33,264 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:33,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-02-24 01:17:33,264 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1653583880, now seen corresponding path program 111 times [2022-02-24 01:17:33,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:33,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947651968] [2022-02-24 01:17:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:33,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:33,272 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:33,272 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:35,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:35,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:35,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:35,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:35,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947651968] [2022-02-24 01:17:35,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1947651968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:35,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:35,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-24 01:17:35,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083128385] [2022-02-24 01:17:35,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:35,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-24 01:17:35,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:35,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-24 01:17:35,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-02-24 01:17:35,528 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:38,408 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2022-02-24 01:17:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-24 01:17:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-02-24 01:17:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:38,409 INFO L225 Difference]: With dead ends: 244 [2022-02-24 01:17:38,409 INFO L226 Difference]: Without dead ends: 238 [2022-02-24 01:17:38,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-02-24 01:17:38,413 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 232 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:38,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 34 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:38,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-24 01:17:38,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2022-02-24 01:17:38,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:38,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2022-02-24 01:17:38,500 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2022-02-24 01:17:38,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:38,500 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2022-02-24 01:17:38,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2022-02-24 01:17:38,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-02-24 01:17:38,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:38,501 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:38,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-02-24 01:17:38,501 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:38,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:38,501 INFO L85 PathProgramCache]: Analyzing trace with hash -830296550, now seen corresponding path program 112 times [2022-02-24 01:17:38,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:38,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959533610] [2022-02-24 01:17:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:38,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:38,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:38,509 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:38,510 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:38,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:40,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:40,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:40,785 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:40,785 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959533610] [2022-02-24 01:17:40,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [959533610] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:40,785 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:40,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-24 01:17:40,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377980545] [2022-02-24 01:17:40,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:40,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-24 01:17:40,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:40,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-24 01:17:40,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 01:17:40,787 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:43,748 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2022-02-24 01:17:43,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-24 01:17:43,748 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-02-24 01:17:43,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:43,749 INFO L225 Difference]: With dead ends: 246 [2022-02-24 01:17:43,749 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 01:17:43,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-02-24 01:17:43,751 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:43,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 59 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:43,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 01:17:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2022-02-24 01:17:43,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:43,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2022-02-24 01:17:43,829 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2022-02-24 01:17:43,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:43,830 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2022-02-24 01:17:43,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:43,830 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2022-02-24 01:17:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-02-24 01:17:43,830 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:43,830 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:43,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-02-24 01:17:43,831 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash 74845116, now seen corresponding path program 113 times [2022-02-24 01:17:43,831 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:43,831 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588920805] [2022-02-24 01:17:43,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:43,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:43,839 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:43,839 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:43,839 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:43,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:46,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:46,177 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:46,177 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588920805] [2022-02-24 01:17:46,177 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [588920805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:46,177 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:46,177 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 01:17:46,177 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699713858] [2022-02-24 01:17:46,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:46,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 01:17:46,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:46,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 01:17:46,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 01:17:46,180 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:49,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:49,153 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2022-02-24 01:17:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 01:17:49,153 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-02-24 01:17:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:49,154 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:17:49,154 INFO L226 Difference]: Without dead ends: 242 [2022-02-24 01:17:49,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-02-24 01:17:49,157 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 236 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:49,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 44 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-24 01:17:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-02-24 01:17:49,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2022-02-24 01:17:49,249 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2022-02-24 01:17:49,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:49,250 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2022-02-24 01:17:49,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2022-02-24 01:17:49,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-02-24 01:17:49,250 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:49,250 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:49,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-02-24 01:17:49,251 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1962374946, now seen corresponding path program 114 times [2022-02-24 01:17:49,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:49,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595585894] [2022-02-24 01:17:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:49,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:49,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:49,259 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:49,259 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:51,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:51,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:51,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:51,600 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:51,600 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595585894] [2022-02-24 01:17:51,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595585894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:51,600 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:51,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-24 01:17:51,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699023973] [2022-02-24 01:17:51,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:51,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-24 01:17:51,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:51,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-24 01:17:51,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 01:17:51,602 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 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) [2022-02-24 01:17:54,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:54,625 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2022-02-24 01:17:54,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-02-24 01:17:54,626 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 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 [2022-02-24 01:17:54,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:54,626 INFO L225 Difference]: With dead ends: 250 [2022-02-24 01:17:54,626 INFO L226 Difference]: Without dead ends: 244 [2022-02-24 01:17:54,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-02-24 01:17:54,629 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 238 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:54,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [238 Valid, 44 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:17:54,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-02-24 01:17:54,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-02-24 01:17:54,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:54,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2022-02-24 01:17:54,710 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2022-02-24 01:17:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:54,710 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2022-02-24 01:17:54,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 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) [2022-02-24 01:17:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2022-02-24 01:17:54,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-02-24 01:17:54,711 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:54,711 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:54,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-02-24 01:17:54,711 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:54,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:54,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1225767552, now seen corresponding path program 115 times [2022-02-24 01:17:54,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:54,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169051200] [2022-02-24 01:17:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:54,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:54,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:54,720 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:54,720 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:57,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:57,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:57,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:57,152 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:57,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169051200] [2022-02-24 01:17:57,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [169051200] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:57,153 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:57,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-24 01:17:57,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578080634] [2022-02-24 01:17:57,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:57,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-24 01:17:57,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-24 01:17:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-02-24 01:17:57,156 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:00,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:00,278 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2022-02-24 01:18:00,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-24 01:18:00,279 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have 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 [2022-02-24 01:18:00,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:00,279 INFO L225 Difference]: With dead ends: 252 [2022-02-24 01:18:00,279 INFO L226 Difference]: Without dead ends: 246 [2022-02-24 01:18:00,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-02-24 01:18:00,282 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 240 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:00,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 49 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:18:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-24 01:18:00,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2022-02-24 01:18:00,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 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) [2022-02-24 01:18:00,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2022-02-24 01:18:00,366 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2022-02-24 01:18:00,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:00,366 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2022-02-24 01:18:00,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:00,366 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2022-02-24 01:18:00,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-02-24 01:18:00,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:00,367 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:00,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-02-24 01:18:00,367 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:00,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:00,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2015665758, now seen corresponding path program 116 times [2022-02-24 01:18:00,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:00,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042328883] [2022-02-24 01:18:00,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:00,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:00,375 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:00,375 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:00,376 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:00,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:03,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:03,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:03,956 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:03,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042328883] [2022-02-24 01:18:03,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042328883] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:03,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:03,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-24 01:18:03,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109819171] [2022-02-24 01:18:03,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:03,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-24 01:18:03,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-24 01:18:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 01:18:03,959 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:08,569 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2022-02-24 01:18:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-24 01:18:08,570 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-02-24 01:18:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:08,570 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:18:08,570 INFO L226 Difference]: Without dead ends: 248 [2022-02-24 01:18:08,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-02-24 01:18:08,574 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 242 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:08,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 44 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-24 01:18:08,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-24 01:18:08,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 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) [2022-02-24 01:18:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2022-02-24 01:18:08,687 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2022-02-24 01:18:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:08,687 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2022-02-24 01:18:08,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2022-02-24 01:18:08,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-02-24 01:18:08,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:08,688 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:08,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-02-24 01:18:08,688 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:08,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:08,688 INFO L85 PathProgramCache]: Analyzing trace with hash -898630332, now seen corresponding path program 117 times [2022-02-24 01:18:08,688 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:08,688 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210429818] [2022-02-24 01:18:08,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:08,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:08,697 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:08,697 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:11,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:11,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:11,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210429818] [2022-02-24 01:18:11,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210429818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:11,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:11,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-24 01:18:11,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283489887] [2022-02-24 01:18:11,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:11,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-24 01:18:11,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-24 01:18:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 01:18:11,578 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:14,840 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2022-02-24 01:18:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-24 01:18:14,841 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2022-02-24 01:18:14,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:14,841 INFO L225 Difference]: With dead ends: 256 [2022-02-24 01:18:14,841 INFO L226 Difference]: Without dead ends: 250 [2022-02-24 01:18:14,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-02-24 01:18:14,844 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 244 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:14,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 34 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:14,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-24 01:18:14,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-02-24 01:18:14,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 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) [2022-02-24 01:18:14,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2022-02-24 01:18:14,930 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2022-02-24 01:18:14,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:14,930 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2022-02-24 01:18:14,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2022-02-24 01:18:14,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-02-24 01:18:14,931 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:14,931 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:14,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-02-24 01:18:14,932 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:14,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:14,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1169409946, now seen corresponding path program 118 times [2022-02-24 01:18:14,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:14,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [866693679] [2022-02-24 01:18:14,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:14,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:14,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:14,949 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:14,949 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:17,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:17,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:17,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:17,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [866693679] [2022-02-24 01:18:17,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [866693679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:17,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:17,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-02-24 01:18:17,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444684041] [2022-02-24 01:18:17,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:17,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-02-24 01:18:17,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:17,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-02-24 01:18:17,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 01:18:17,552 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:21,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:21,039 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2022-02-24 01:18:21,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-02-24 01:18:21,039 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2022-02-24 01:18:21,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:21,039 INFO L225 Difference]: With dead ends: 258 [2022-02-24 01:18:21,040 INFO L226 Difference]: Without dead ends: 252 [2022-02-24 01:18:21,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-02-24 01:18:21,042 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 246 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:21,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 34 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:21,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-24 01:18:21,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2022-02-24 01:18:21,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:21,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2022-02-24 01:18:21,141 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2022-02-24 01:18:21,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:21,141 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2022-02-24 01:18:21,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:21,141 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2022-02-24 01:18:21,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-02-24 01:18:21,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:21,142 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:21,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-02-24 01:18:21,142 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:21,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:21,143 INFO L85 PathProgramCache]: Analyzing trace with hash 604386056, now seen corresponding path program 119 times [2022-02-24 01:18:21,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:21,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278954982] [2022-02-24 01:18:21,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:21,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:21,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:21,153 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:21,153 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:21,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:23,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:23,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:23,731 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:23,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278954982] [2022-02-24 01:18:23,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1278954982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:23,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:23,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-24 01:18:23,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163445305] [2022-02-24 01:18:23,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:23,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-24 01:18:23,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-24 01:18:23,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 01:18:23,735 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:27,101 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2022-02-24 01:18:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-24 01:18:27,101 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-02-24 01:18:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:27,102 INFO L225 Difference]: With dead ends: 260 [2022-02-24 01:18:27,102 INFO L226 Difference]: Without dead ends: 254 [2022-02-24 01:18:27,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-02-24 01:18:27,104 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 248 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:27,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 49 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:27,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-24 01:18:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-02-24 01:18:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2022-02-24 01:18:27,192 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2022-02-24 01:18:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:27,193 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2022-02-24 01:18:27,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2022-02-24 01:18:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-02-24 01:18:27,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:27,193 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:27,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-02-24 01:18:27,194 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 120327466, now seen corresponding path program 120 times [2022-02-24 01:18:27,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:27,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913787102] [2022-02-24 01:18:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:27,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:27,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:27,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:27,203 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:29,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:29,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:29,866 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:29,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913787102] [2022-02-24 01:18:29,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1913787102] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:29,867 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:29,867 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-24 01:18:29,867 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209848316] [2022-02-24 01:18:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:29,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-24 01:18:29,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-24 01:18:29,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-02-24 01:18:29,870 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:33,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:33,347 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2022-02-24 01:18:33,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-24 01:18:33,347 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2022-02-24 01:18:33,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:33,347 INFO L225 Difference]: With dead ends: 262 [2022-02-24 01:18:33,347 INFO L226 Difference]: Without dead ends: 256 [2022-02-24 01:18:33,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-02-24 01:18:33,350 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 250 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:33,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 44 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:18:33,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-02-24 01:18:33,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2022-02-24 01:18:33,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.004) internal successors, (251), 250 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) [2022-02-24 01:18:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2022-02-24 01:18:33,439 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2022-02-24 01:18:33,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:33,439 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2022-02-24 01:18:33,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:33,440 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2022-02-24 01:18:33,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-24 01:18:33,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:33,440 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:33,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-02-24 01:18:33,440 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:33,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1203509556, now seen corresponding path program 121 times [2022-02-24 01:18:33,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:33,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848373941] [2022-02-24 01:18:33,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:33,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:33,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:33,451 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:33,451 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:33,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:36,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:36,227 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:36,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848373941] [2022-02-24 01:18:36,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1848373941] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:36,227 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:36,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-02-24 01:18:36,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899551805] [2022-02-24 01:18:36,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:36,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-02-24 01:18:36,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:36,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-02-24 01:18:36,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-02-24 01:18:36,231 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:39,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:39,813 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2022-02-24 01:18:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-24 01:18:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-02-24 01:18:39,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:39,814 INFO L225 Difference]: With dead ends: 264 [2022-02-24 01:18:39,814 INFO L226 Difference]: Without dead ends: 258 [2022-02-24 01:18:39,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-02-24 01:18:39,816 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:39,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 39 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-24 01:18:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2022-02-24 01:18:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2022-02-24 01:18:39,907 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2022-02-24 01:18:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:39,908 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2022-02-24 01:18:39,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2022-02-24 01:18:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-02-24 01:18:39,909 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:39,909 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:39,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-02-24 01:18:39,909 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:39,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:39,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2100568082, now seen corresponding path program 122 times [2022-02-24 01:18:39,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:39,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283362118] [2022-02-24 01:18:39,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:39,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:39,918 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:39,918 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:39,918 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:42,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:42,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:42,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:42,690 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:42,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283362118] [2022-02-24 01:18:42,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283362118] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:42,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:42,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-24 01:18:42,690 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56715072] [2022-02-24 01:18:42,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:42,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-24 01:18:42,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:42,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-24 01:18:42,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 01:18:42,693 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:46,425 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2022-02-24 01:18:46,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-24 01:18:46,425 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-02-24 01:18:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:46,426 INFO L225 Difference]: With dead ends: 266 [2022-02-24 01:18:46,426 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 01:18:46,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-02-24 01:18:46,428 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 254 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:46,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 59 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:46,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 01:18:46,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-02-24 01:18:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2022-02-24 01:18:46,521 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2022-02-24 01:18:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:46,521 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2022-02-24 01:18:46,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2022-02-24 01:18:46,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-02-24 01:18:46,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:46,522 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:46,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-02-24 01:18:46,522 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash -885385072, now seen corresponding path program 123 times [2022-02-24 01:18:46,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:46,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322020250] [2022-02-24 01:18:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:46,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:46,531 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:46,532 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:46,532 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:49,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:49,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:49,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322020250] [2022-02-24 01:18:49,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322020250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:49,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:49,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-02-24 01:18:49,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138100628] [2022-02-24 01:18:49,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:49,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-02-24 01:18:49,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:49,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-02-24 01:18:49,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 01:18:49,321 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:52,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:52,891 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2022-02-24 01:18:52,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-24 01:18:52,891 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2022-02-24 01:18:52,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:52,891 INFO L225 Difference]: With dead ends: 268 [2022-02-24 01:18:52,892 INFO L226 Difference]: Without dead ends: 262 [2022-02-24 01:18:52,894 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-02-24 01:18:52,894 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 256 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:52,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 49 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:18:52,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-24 01:18:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2022-02-24 01:18:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.00390625) internal successors, (257), 256 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) [2022-02-24 01:18:52,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2022-02-24 01:18:52,988 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2022-02-24 01:18:52,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:52,989 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2022-02-24 01:18:52,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:52,989 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2022-02-24 01:18:52,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-02-24 01:18:52,990 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:52,990 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:52,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-02-24 01:18:52,991 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:52,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1325616974, now seen corresponding path program 124 times [2022-02-24 01:18:52,991 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:52,991 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935169023] [2022-02-24 01:18:52,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:52,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:53,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:53,001 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:53,001 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:57,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:57,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:57,908 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:57,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935169023] [2022-02-24 01:18:57,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [935169023] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:57,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:57,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-24 01:18:57,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356438351] [2022-02-24 01:18:57,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:57,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-24 01:18:57,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:57,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-24 01:18:57,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-02-24 01:18:57,912 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:03,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:03,837 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2022-02-24 01:19:03,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-24 01:19:03,837 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-02-24 01:19:03,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:03,838 INFO L225 Difference]: With dead ends: 270 [2022-02-24 01:19:03,838 INFO L226 Difference]: Without dead ends: 264 [2022-02-24 01:19:03,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-02-24 01:19:03,840 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:03,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 44 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 289 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:19:03,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-24 01:19:03,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2022-02-24 01:19:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:03,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2022-02-24 01:19:03,936 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2022-02-24 01:19:03,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:03,936 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2022-02-24 01:19:03,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2022-02-24 01:19:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-02-24 01:19:03,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:03,937 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:03,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-02-24 01:19:03,937 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash 813287508, now seen corresponding path program 125 times [2022-02-24 01:19:03,937 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:03,937 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571610019] [2022-02-24 01:19:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:03,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:03,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:03,947 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:03,947 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:04,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:07,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:07,837 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:07,837 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571610019] [2022-02-24 01:19:07,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [571610019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:07,837 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:07,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-24 01:19:07,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411477580] [2022-02-24 01:19:07,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:07,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-24 01:19:07,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:07,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-24 01:19:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 01:19:07,841 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:11,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:11,494 INFO L93 Difference]: Finished difference Result 272 states and 272 transitions. [2022-02-24 01:19:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-24 01:19:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-02-24 01:19:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:11,495 INFO L225 Difference]: With dead ends: 272 [2022-02-24 01:19:11,495 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 01:19:11,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-02-24 01:19:11,497 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 260 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 260 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:11,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [260 Valid, 44 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:19:11,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 01:19:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-02-24 01:19:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:11,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2022-02-24 01:19:11,594 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2022-02-24 01:19:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:11,595 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2022-02-24 01:19:11,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2022-02-24 01:19:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-02-24 01:19:11,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:11,596 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:11,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-02-24 01:19:11,599 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:11,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:11,599 INFO L85 PathProgramCache]: Analyzing trace with hash -988840074, now seen corresponding path program 126 times [2022-02-24 01:19:11,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:11,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983040496] [2022-02-24 01:19:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:11,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:11,612 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:11,612 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:11,612 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:14,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:14,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:14,586 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:14,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983040496] [2022-02-24 01:19:14,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [983040496] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:14,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:14,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-24 01:19:14,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253146892] [2022-02-24 01:19:14,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:14,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-24 01:19:14,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:14,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-24 01:19:14,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-02-24 01:19:14,591 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:18,285 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2022-02-24 01:19:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-24 01:19:18,285 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2022-02-24 01:19:18,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:18,286 INFO L225 Difference]: With dead ends: 274 [2022-02-24 01:19:18,286 INFO L226 Difference]: Without dead ends: 268 [2022-02-24 01:19:18,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-02-24 01:19:18,291 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 262 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:18,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 24 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:19:18,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-24 01:19:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-02-24 01:19:18,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:18,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2022-02-24 01:19:18,397 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2022-02-24 01:19:18,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:18,398 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2022-02-24 01:19:18,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:18,399 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2022-02-24 01:19:18,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-02-24 01:19:18,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:18,399 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:18,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-02-24 01:19:18,401 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:18,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:18,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1961626088, now seen corresponding path program 127 times [2022-02-24 01:19:18,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:18,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527338362] [2022-02-24 01:19:18,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:18,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:18,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:18,410 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:18,410 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:18,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:23,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:23,580 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:23,580 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527338362] [2022-02-24 01:19:23,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1527338362] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:23,580 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:23,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-02-24 01:19:23,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583954569] [2022-02-24 01:19:23,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:23,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-02-24 01:19:23,581 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:23,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-02-24 01:19:23,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 01:19:23,585 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:27,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:27,578 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2022-02-24 01:19:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-24 01:19:27,579 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2022-02-24 01:19:27,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:27,579 INFO L225 Difference]: With dead ends: 276 [2022-02-24 01:19:27,579 INFO L226 Difference]: Without dead ends: 270 [2022-02-24 01:19:27,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-02-24 01:19:27,583 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:27,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 44 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:19:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-24 01:19:27,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2022-02-24 01:19:27,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.003787878787879) internal successors, (265), 264 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:27,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2022-02-24 01:19:27,697 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2022-02-24 01:19:27,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:27,697 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2022-02-24 01:19:27,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:27,697 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2022-02-24 01:19:27,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-02-24 01:19:27,698 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:27,698 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:27,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-02-24 01:19:27,698 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:27,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:27,698 INFO L85 PathProgramCache]: Analyzing trace with hash -506115014, now seen corresponding path program 128 times [2022-02-24 01:19:27,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:27,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [458352373] [2022-02-24 01:19:27,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:27,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:27,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:27,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:27,709 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:27,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:31,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:31,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:31,043 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:31,043 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [458352373] [2022-02-24 01:19:31,043 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [458352373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:31,043 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:31,043 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-24 01:19:31,043 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141156801] [2022-02-24 01:19:31,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:31,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-24 01:19:31,043 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:31,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-24 01:19:31,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-02-24 01:19:31,046 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:35,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:35,034 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2022-02-24 01:19:35,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-24 01:19:35,035 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2022-02-24 01:19:35,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:35,035 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:19:35,035 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 01:19:35,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-02-24 01:19:35,038 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 266 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:35,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 44 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:19:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 01:19:35,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-02-24 01:19:35,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0037593984962405) internal successors, (267), 266 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:35,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2022-02-24 01:19:35,139 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2022-02-24 01:19:35,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:35,140 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2022-02-24 01:19:35,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:35,140 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2022-02-24 01:19:35,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-02-24 01:19:35,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:35,140 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:35,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-02-24 01:19:35,141 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:35,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:35,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1919311396, now seen corresponding path program 129 times [2022-02-24 01:19:35,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:35,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999341364] [2022-02-24 01:19:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:35,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:35,151 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:35,151 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:35,151 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:38,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:38,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:38,215 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:38,215 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999341364] [2022-02-24 01:19:38,215 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [999341364] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:38,215 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:38,215 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-02-24 01:19:38,215 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217111812] [2022-02-24 01:19:38,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:38,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-02-24 01:19:38,216 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:38,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-02-24 01:19:38,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 01:19:38,219 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:42,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:42,470 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2022-02-24 01:19:42,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-24 01:19:42,471 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2022-02-24 01:19:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:42,471 INFO L225 Difference]: With dead ends: 280 [2022-02-24 01:19:42,471 INFO L226 Difference]: Without dead ends: 274 [2022-02-24 01:19:42,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-02-24 01:19:42,474 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 268 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:42,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [268 Valid, 34 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:19:42,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-02-24 01:19:42,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2022-02-24 01:19:42,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0037313432835822) internal successors, (269), 268 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:42,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2022-02-24 01:19:42,579 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2022-02-24 01:19:42,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:42,579 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2022-02-24 01:19:42,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:42,579 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2022-02-24 01:19:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-02-24 01:19:42,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:42,580 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:42,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-02-24 01:19:42,580 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:42,581 INFO L85 PathProgramCache]: Analyzing trace with hash 1503598334, now seen corresponding path program 130 times [2022-02-24 01:19:42,581 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:42,581 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655236060] [2022-02-24 01:19:42,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:42,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:42,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:42,590 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:42,590 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:47,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:47,185 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:47,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655236060] [2022-02-24 01:19:47,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1655236060] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:47,185 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:47,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-24 01:19:47,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586461781] [2022-02-24 01:19:47,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:47,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-24 01:19:47,186 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:47,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-24 01:19:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 01:19:47,190 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:52,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:52,354 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2022-02-24 01:19:52,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-24 01:19:52,354 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2022-02-24 01:19:52,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:52,355 INFO L225 Difference]: With dead ends: 282 [2022-02-24 01:19:52,355 INFO L226 Difference]: Without dead ends: 276 [2022-02-24 01:19:52,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-02-24 01:19:52,359 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:52,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 49 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:19:52,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-24 01:19:52,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2022-02-24 01:19:52,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0037037037037038) internal successors, (271), 270 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) [2022-02-24 01:19:52,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2022-02-24 01:19:52,477 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2022-02-24 01:19:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:52,477 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2022-02-24 01:19:52,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:52,477 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2022-02-24 01:19:52,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-02-24 01:19:52,478 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:52,478 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:52,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-02-24 01:19:52,478 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:52,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:52,478 INFO L85 PathProgramCache]: Analyzing trace with hash 974900128, now seen corresponding path program 131 times [2022-02-24 01:19:52,478 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:52,478 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [364842671] [2022-02-24 01:19:52,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:52,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:52,488 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:52,488 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:52,488 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:55,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:55,927 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:55,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [364842671] [2022-02-24 01:19:55,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [364842671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:55,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:55,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-02-24 01:19:55,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356259261] [2022-02-24 01:19:55,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:55,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-02-24 01:19:55,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-02-24 01:19:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 01:19:55,931 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:00,015 INFO L93 Difference]: Finished difference Result 284 states and 284 transitions. [2022-02-24 01:20:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-24 01:20:00,016 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-02-24 01:20:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:00,016 INFO L225 Difference]: With dead ends: 284 [2022-02-24 01:20:00,016 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 01:20:00,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-02-24 01:20:00,019 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 272 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:00,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 39 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 01:20:00,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-02-24 01:20:00,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0036764705882353) internal successors, (273), 272 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) [2022-02-24 01:20:00,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2022-02-24 01:20:00,129 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2022-02-24 01:20:00,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:00,129 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2022-02-24 01:20:00,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:00,129 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2022-02-24 01:20:00,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2022-02-24 01:20:00,130 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:00,130 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:00,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-02-24 01:20:00,130 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:00,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:00,130 INFO L85 PathProgramCache]: Analyzing trace with hash -297934910, now seen corresponding path program 132 times [2022-02-24 01:20:00,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:00,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479383836] [2022-02-24 01:20:00,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:00,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:00,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:00,142 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:00,142 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:00,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:03,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:03,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:03,585 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:03,585 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479383836] [2022-02-24 01:20:03,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [479383836] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:03,586 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:03,586 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-02-24 01:20:03,586 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501402895] [2022-02-24 01:20:03,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:03,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-24 01:20:03,586 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:03,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-24 01:20:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-02-24 01:20:03,590 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:08,497 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2022-02-24 01:20:08,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-02-24 01:20:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2022-02-24 01:20:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:08,498 INFO L225 Difference]: With dead ends: 286 [2022-02-24 01:20:08,498 INFO L226 Difference]: Without dead ends: 280 [2022-02-24 01:20:08,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-02-24 01:20:08,501 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 274 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:08,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 49 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-24 01:20:08,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2022-02-24 01:20:08,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0036496350364963) internal successors, (275), 274 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:08,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2022-02-24 01:20:08,623 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2022-02-24 01:20:08,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:08,624 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2022-02-24 01:20:08,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:08,624 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2022-02-24 01:20:08,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-02-24 01:20:08,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:08,625 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:08,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-02-24 01:20:08,625 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:08,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:08,625 INFO L85 PathProgramCache]: Analyzing trace with hash 573272932, now seen corresponding path program 133 times [2022-02-24 01:20:08,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:08,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33040125] [2022-02-24 01:20:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:08,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:08,636 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:08,636 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:12,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:12,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:12,006 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:12,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33040125] [2022-02-24 01:20:12,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [33040125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:12,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:12,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-24 01:20:12,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389999568] [2022-02-24 01:20:12,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:12,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-24 01:20:12,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-24 01:20:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 01:20:12,009 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:16,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:16,445 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2022-02-24 01:20:16,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-24 01:20:16,445 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-02-24 01:20:16,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:16,445 INFO L225 Difference]: With dead ends: 288 [2022-02-24 01:20:16,446 INFO L226 Difference]: Without dead ends: 282 [2022-02-24 01:20:16,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-02-24 01:20:16,448 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 276 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:16,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 34 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-02-24 01:20:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-02-24 01:20:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0036231884057971) internal successors, (277), 276 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:16,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2022-02-24 01:20:16,557 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2022-02-24 01:20:16,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:16,557 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2022-02-24 01:20:16,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:16,558 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2022-02-24 01:20:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-02-24 01:20:16,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:16,558 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:16,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-02-24 01:20:16,558 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:16,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:16,560 INFO L85 PathProgramCache]: Analyzing trace with hash 285386374, now seen corresponding path program 134 times [2022-02-24 01:20:16,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:16,560 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215747342] [2022-02-24 01:20:16,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:16,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:16,571 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:16,571 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:16,571 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:16,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:21,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:21,644 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:21,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215747342] [2022-02-24 01:20:21,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [215747342] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:21,644 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:21,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-24 01:20:21,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170148071] [2022-02-24 01:20:21,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:21,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-24 01:20:21,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:21,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-24 01:20:21,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 01:20:21,649 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:26,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:26,316 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2022-02-24 01:20:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-24 01:20:26,317 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2022-02-24 01:20:26,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:26,317 INFO L225 Difference]: With dead ends: 290 [2022-02-24 01:20:26,317 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 01:20:26,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-02-24 01:20:26,321 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 278 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:26,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 49 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:26,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 01:20:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-02-24 01:20:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0035971223021583) internal successors, (279), 278 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:26,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2022-02-24 01:20:26,454 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2022-02-24 01:20:26,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:26,454 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2022-02-24 01:20:26,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:26,454 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2022-02-24 01:20:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-02-24 01:20:26,455 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:26,455 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:26,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-02-24 01:20:26,455 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:26,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:26,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1495688920, now seen corresponding path program 135 times [2022-02-24 01:20:26,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:26,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460679812] [2022-02-24 01:20:26,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:26,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:26,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:26,467 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:26,467 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:26,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:29,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:29,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:29,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:29,805 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:29,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460679812] [2022-02-24 01:20:29,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460679812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:29,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:29,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-02-24 01:20:29,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528919036] [2022-02-24 01:20:29,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:29,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-02-24 01:20:29,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:29,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-02-24 01:20:29,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 01:20:29,808 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:34,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:34,306 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2022-02-24 01:20:34,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-02-24 01:20:34,306 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2022-02-24 01:20:34,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:34,308 INFO L225 Difference]: With dead ends: 292 [2022-02-24 01:20:34,308 INFO L226 Difference]: Without dead ends: 286 [2022-02-24 01:20:34,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-02-24 01:20:34,311 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 280 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:34,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 49 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-02-24 01:20:34,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2022-02-24 01:20:34,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0035714285714286) internal successors, (281), 280 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:34,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2022-02-24 01:20:34,424 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2022-02-24 01:20:34,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:34,425 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2022-02-24 01:20:34,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:34,425 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2022-02-24 01:20:34,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-24 01:20:34,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:34,426 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:34,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-02-24 01:20:34,426 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash 582904650, now seen corresponding path program 136 times [2022-02-24 01:20:34,426 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:34,426 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [162188563] [2022-02-24 01:20:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:34,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:34,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:34,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:34,437 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:37,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:37,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:37,995 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:37,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [162188563] [2022-02-24 01:20:37,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [162188563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:37,995 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:37,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-24 01:20:37,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906165279] [2022-02-24 01:20:37,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:37,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-24 01:20:37,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:37,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-24 01:20:37,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-02-24 01:20:37,997 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:42,387 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2022-02-24 01:20:42,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-24 01:20:42,387 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-02-24 01:20:42,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:42,388 INFO L225 Difference]: With dead ends: 294 [2022-02-24 01:20:42,388 INFO L226 Difference]: Without dead ends: 288 [2022-02-24 01:20:42,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9452 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=28773, Invalid=47679, Unknown=0, NotChecked=0, Total=76452 [2022-02-24 01:20:42,391 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:42,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 34 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-24 01:20:42,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2022-02-24 01:20:42,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.00354609929078) internal successors, (283), 282 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:42,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2022-02-24 01:20:42,506 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2022-02-24 01:20:42,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:42,506 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2022-02-24 01:20:42,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:42,506 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2022-02-24 01:20:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-02-24 01:20:42,507 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:42,507 INFO L514 BasicCegarLoop]: trace histogram [137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:42,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-02-24 01:20:42,507 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:42,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:42,507 INFO L85 PathProgramCache]: Analyzing trace with hash 951532780, now seen corresponding path program 137 times [2022-02-24 01:20:42,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:42,508 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1514667075] [2022-02-24 01:20:42,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:42,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:42,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:42,519 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:42,519 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:46,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:46,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:46,511 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:46,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1514667075] [2022-02-24 01:20:46,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1514667075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:46,511 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:46,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-02-24 01:20:46,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266033096] [2022-02-24 01:20:46,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:46,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-02-24 01:20:46,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:46,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-02-24 01:20:46,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 01:20:46,515 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:50,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:50,990 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2022-02-24 01:20:50,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-24 01:20:50,990 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-02-24 01:20:50,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:50,991 INFO L225 Difference]: With dead ends: 296 [2022-02-24 01:20:50,991 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 01:20:50,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9590 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=29190, Invalid=48372, Unknown=0, NotChecked=0, Total=77562 [2022-02-24 01:20:50,995 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 284 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:50,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 34 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 01:20:51,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-02-24 01:20:51,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0035211267605635) internal successors, (285), 284 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) [2022-02-24 01:20:51,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2022-02-24 01:20:51,127 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2022-02-24 01:20:51,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:51,127 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2022-02-24 01:20:51,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:51,128 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2022-02-24 01:20:51,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-02-24 01:20:51,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:51,129 INFO L514 BasicCegarLoop]: trace histogram [138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:51,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-02-24 01:20:51,129 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:51,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1279119858, now seen corresponding path program 138 times [2022-02-24 01:20:51,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:51,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936847880] [2022-02-24 01:20:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:51,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:51,141 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:51,141 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:51,141 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:54,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:54,624 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:54,624 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936847880] [2022-02-24 01:20:54,624 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [936847880] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:54,624 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:54,624 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-02-24 01:20:54,624 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016548358] [2022-02-24 01:20:54,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:54,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-24 01:20:54,625 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:54,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-24 01:20:54,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 01:20:54,628 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:59,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:59,122 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2022-02-24 01:20:59,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-02-24 01:20:59,122 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 288 [2022-02-24 01:20:59,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:59,123 INFO L225 Difference]: With dead ends: 298 [2022-02-24 01:20:59,123 INFO L226 Difference]: Without dead ends: 292 [2022-02-24 01:20:59,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9729 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=29610, Invalid=49070, Unknown=0, NotChecked=0, Total=78680 [2022-02-24 01:20:59,127 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 286 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:59,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 69 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:20:59,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-02-24 01:20:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2022-02-24 01:20:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.0034965034965035) internal successors, (287), 286 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) [2022-02-24 01:20:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2022-02-24 01:20:59,261 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2022-02-24 01:20:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:59,261 INFO L470 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2022-02-24 01:20:59,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2022-02-24 01:20:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-02-24 01:20:59,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:59,262 INFO L514 BasicCegarLoop]: trace histogram [139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:59,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-02-24 01:20:59,262 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:59,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:59,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1747624272, now seen corresponding path program 139 times [2022-02-24 01:20:59,262 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:59,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1216869338] [2022-02-24 01:20:59,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:59,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:59,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:59,273 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:59,273 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:59,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:03,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:03,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:03,173 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:03,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1216869338] [2022-02-24 01:21:03,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1216869338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:03,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:03,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-02-24 01:21:03,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823734562] [2022-02-24 01:21:03,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:03,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-02-24 01:21:03,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:03,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-02-24 01:21:03,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 01:21:03,177 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:07,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:07,753 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2022-02-24 01:21:07,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-24 01:21:07,753 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2022-02-24 01:21:07,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:07,754 INFO L225 Difference]: With dead ends: 300 [2022-02-24 01:21:07,754 INFO L226 Difference]: Without dead ends: 294 [2022-02-24 01:21:07,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9869 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=30033, Invalid=49773, Unknown=0, NotChecked=0, Total=79806 [2022-02-24 01:21:07,757 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 288 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:07,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 39 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:21:07,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-24 01:21:07,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2022-02-24 01:21:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0034722222222223) internal successors, (289), 288 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2022-02-24 01:21:07,878 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2022-02-24 01:21:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:07,879 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2022-02-24 01:21:07,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:07,879 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2022-02-24 01:21:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-02-24 01:21:07,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:07,880 INFO L514 BasicCegarLoop]: trace histogram [140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:07,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-02-24 01:21:07,880 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:07,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:07,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1008800046, now seen corresponding path program 140 times [2022-02-24 01:21:07,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:07,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783082267] [2022-02-24 01:21:07,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:07,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:07,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:07,892 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:07,892 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:07,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:11,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:11,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:11,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:11,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783082267] [2022-02-24 01:21:11,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1783082267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:11,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:11,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-02-24 01:21:11,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214378405] [2022-02-24 01:21:11,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:11,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-02-24 01:21:11,451 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:11,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-02-24 01:21:11,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2022-02-24 01:21:11,453 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:16,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:16,007 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2022-02-24 01:21:16,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-02-24 01:21:16,007 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2022-02-24 01:21:16,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:16,008 INFO L225 Difference]: With dead ends: 302 [2022-02-24 01:21:16,008 INFO L226 Difference]: Without dead ends: 296 [2022-02-24 01:21:16,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10010 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=30459, Invalid=50481, Unknown=0, NotChecked=0, Total=80940 [2022-02-24 01:21:16,011 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 290 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:16,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 34 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:21:16,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-24 01:21:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-02-24 01:21:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.0034482758620689) internal successors, (291), 290 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 295 transitions. [2022-02-24 01:21:16,133 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 295 transitions. Word has length 292 [2022-02-24 01:21:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:16,133 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 295 transitions. [2022-02-24 01:21:16,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 295 transitions. [2022-02-24 01:21:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-02-24 01:21:16,134 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:16,134 INFO L514 BasicCegarLoop]: trace histogram [141, 141, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:16,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-02-24 01:21:16,134 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:16,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash 331677300, now seen corresponding path program 141 times [2022-02-24 01:21:16,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:16,135 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643277344] [2022-02-24 01:21:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:16,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:16,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:16,146 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:16,146 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:16,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:20,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:20,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:20,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:20,899 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:20,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643277344] [2022-02-24 01:21:20,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643277344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:20,899 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:20,900 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-02-24 01:21:20,900 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536776696] [2022-02-24 01:21:20,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:20,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-02-24 01:21:20,900 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:20,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-02-24 01:21:20,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10298, Invalid=10582, Unknown=0, NotChecked=0, Total=20880 [2022-02-24 01:21:20,903 INFO L87 Difference]: Start difference. First operand 295 states and 295 transitions. Second operand has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:25,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:25,922 INFO L93 Difference]: Finished difference Result 304 states and 304 transitions. [2022-02-24 01:21:25,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-24 01:21:25,923 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-02-24 01:21:25,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:25,924 INFO L225 Difference]: With dead ends: 304 [2022-02-24 01:21:25,924 INFO L226 Difference]: Without dead ends: 298 [2022-02-24 01:21:25,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10152 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=30888, Invalid=51194, Unknown=0, NotChecked=0, Total=82082 [2022-02-24 01:21:25,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 292 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:25,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 49 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:21:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-24 01:21:26,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 297. [2022-02-24 01:21:26,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 292 states have (on average 1.0034246575342465) internal successors, (293), 292 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 297 transitions. [2022-02-24 01:21:26,064 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 297 transitions. Word has length 294 [2022-02-24 01:21:26,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:26,065 INFO L470 AbstractCegarLoop]: Abstraction has 297 states and 297 transitions. [2022-02-24 01:21:26,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 2.0) internal successors, (290), 144 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:26,065 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 297 transitions. [2022-02-24 01:21:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-02-24 01:21:26,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:26,066 INFO L514 BasicCegarLoop]: trace histogram [142, 142, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:26,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-02-24 01:21:26,066 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:26,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:26,066 INFO L85 PathProgramCache]: Analyzing trace with hash 40218006, now seen corresponding path program 142 times [2022-02-24 01:21:26,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:26,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946699841] [2022-02-24 01:21:26,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:26,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:26,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:26,080 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:26,080 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:30,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:30,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:30,435 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:30,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946699841] [2022-02-24 01:21:30,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1946699841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:30,436 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:30,436 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-24 01:21:30,436 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099333671] [2022-02-24 01:21:30,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:30,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-24 01:21:30,436 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-24 01:21:30,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10442, Invalid=10728, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 01:21:30,439 INFO L87 Difference]: Start difference. First operand 297 states and 297 transitions. Second operand has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:35,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:35,737 INFO L93 Difference]: Finished difference Result 306 states and 306 transitions. [2022-02-24 01:21:35,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-24 01:21:35,737 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2022-02-24 01:21:35,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:35,738 INFO L225 Difference]: With dead ends: 306 [2022-02-24 01:21:35,738 INFO L226 Difference]: Without dead ends: 300 [2022-02-24 01:21:35,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10295 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=31320, Invalid=51912, Unknown=0, NotChecked=0, Total=83232 [2022-02-24 01:21:35,742 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 294 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:35,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 44 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:21:35,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-24 01:21:35,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 299. [2022-02-24 01:21:35,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.0034013605442176) internal successors, (295), 294 states have internal predecessors, (295), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:35,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2022-02-24 01:21:35,872 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 296 [2022-02-24 01:21:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:35,872 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2022-02-24 01:21:35,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 2.0) internal successors, (292), 145 states have internal predecessors, (292), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2022-02-24 01:21:35,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-02-24 01:21:35,873 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:35,873 INFO L514 BasicCegarLoop]: trace histogram [143, 143, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:35,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-02-24 01:21:35,873 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:35,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:35,873 INFO L85 PathProgramCache]: Analyzing trace with hash -879289288, now seen corresponding path program 143 times [2022-02-24 01:21:35,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:35,873 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468292798] [2022-02-24 01:21:35,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:35,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:35,886 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:35,887 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:35,887 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:40,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:40,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:40,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:40,224 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:40,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468292798] [2022-02-24 01:21:40,225 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [468292798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:40,225 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:40,225 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-02-24 01:21:40,225 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815000306] [2022-02-24 01:21:40,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:40,225 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-02-24 01:21:40,225 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:40,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-02-24 01:21:40,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10587, Invalid=10875, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 01:21:40,228 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:45,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:45,784 INFO L93 Difference]: Finished difference Result 308 states and 308 transitions. [2022-02-24 01:21:45,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-24 01:21:45,784 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 298 [2022-02-24 01:21:45,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:45,785 INFO L225 Difference]: With dead ends: 308 [2022-02-24 01:21:45,785 INFO L226 Difference]: Without dead ends: 302 [2022-02-24 01:21:45,788 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10439 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=31755, Invalid=52635, Unknown=0, NotChecked=0, Total=84390 [2022-02-24 01:21:45,788 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 296 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:45,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [296 Valid, 49 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:21:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-02-24 01:21:45,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 301. [2022-02-24 01:21:45,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 296 states have (on average 1.0033783783783783) internal successors, (297), 296 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:45,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 301 transitions. [2022-02-24 01:21:45,915 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 301 transitions. Word has length 298 [2022-02-24 01:21:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:45,915 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 301 transitions. [2022-02-24 01:21:45,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 2.0) internal successors, (294), 146 states have internal predecessors, (294), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:45,915 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 301 transitions. [2022-02-24 01:21:45,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2022-02-24 01:21:45,916 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:45,916 INFO L514 BasicCegarLoop]: trace histogram [144, 144, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:45,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-02-24 01:21:45,916 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:45,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:45,916 INFO L85 PathProgramCache]: Analyzing trace with hash 237464154, now seen corresponding path program 144 times [2022-02-24 01:21:45,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:45,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231753032] [2022-02-24 01:21:45,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:45,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:45,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:45,939 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:45,939 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:50,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:50,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:50,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:50,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:50,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231753032] [2022-02-24 01:21:50,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1231753032] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:50,242 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:50,242 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-02-24 01:21:50,242 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147188609] [2022-02-24 01:21:50,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:50,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-02-24 01:21:50,242 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:50,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-02-24 01:21:50,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10733, Invalid=11023, Unknown=0, NotChecked=0, Total=21756 [2022-02-24 01:21:50,245 INFO L87 Difference]: Start difference. First operand 301 states and 301 transitions. Second operand has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:55,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:55,643 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2022-02-24 01:21:55,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2022-02-24 01:21:55,643 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 300 [2022-02-24 01:21:55,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:55,644 INFO L225 Difference]: With dead ends: 310 [2022-02-24 01:21:55,644 INFO L226 Difference]: Without dead ends: 304 [2022-02-24 01:21:55,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10584 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=32193, Invalid=53363, Unknown=0, NotChecked=0, Total=85556 [2022-02-24 01:21:55,648 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 298 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:55,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 39 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:21:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-24 01:21:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 303. [2022-02-24 01:21:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 298 states have (on average 1.0033557046979866) internal successors, (299), 298 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 303 transitions. [2022-02-24 01:21:55,791 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 303 transitions. Word has length 300 [2022-02-24 01:21:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:55,791 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 303 transitions. [2022-02-24 01:21:55,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 2.0) internal successors, (296), 147 states have internal predecessors, (296), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 303 transitions. [2022-02-24 01:21:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-02-24 01:21:55,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:55,793 INFO L514 BasicCegarLoop]: trace histogram [145, 145, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:55,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-02-24 01:21:55,793 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:55,793 INFO L85 PathProgramCache]: Analyzing trace with hash -304302084, now seen corresponding path program 145 times [2022-02-24 01:21:55,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:55,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684156905] [2022-02-24 01:21:55,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:55,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:55,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:55,806 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:55,806 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:55,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:00,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:00,326 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:00,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684156905] [2022-02-24 01:22:00,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [684156905] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:00,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:00,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-24 01:22:00,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669133053] [2022-02-24 01:22:00,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:00,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-24 01:22:00,329 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:00,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-24 01:22:00,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10880, Invalid=11172, Unknown=0, NotChecked=0, Total=22052 [2022-02-24 01:22:00,332 INFO L87 Difference]: Start difference. First operand 303 states and 303 transitions. Second operand has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:05,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:05,175 INFO L93 Difference]: Finished difference Result 312 states and 312 transitions. [2022-02-24 01:22:05,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-24 01:22:05,175 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 302 [2022-02-24 01:22:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:05,176 INFO L225 Difference]: With dead ends: 312 [2022-02-24 01:22:05,176 INFO L226 Difference]: Without dead ends: 306 [2022-02-24 01:22:05,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10730 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=32634, Invalid=54096, Unknown=0, NotChecked=0, Total=86730 [2022-02-24 01:22:05,180 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 300 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:05,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [300 Valid, 49 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:22:05,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-02-24 01:22:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 305. [2022-02-24 01:22:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0033333333333334) internal successors, (301), 300 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) [2022-02-24 01:22:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 305 transitions. [2022-02-24 01:22:05,327 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 305 transitions. Word has length 302 [2022-02-24 01:22:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 305 transitions. [2022-02-24 01:22:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.0) internal successors, (298), 148 states have internal predecessors, (298), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 305 transitions. [2022-02-24 01:22:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-02-24 01:22:05,328 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:05,328 INFO L514 BasicCegarLoop]: trace histogram [146, 146, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:05,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-02-24 01:22:05,328 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:05,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:05,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1250613986, now seen corresponding path program 146 times [2022-02-24 01:22:05,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:05,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6153896] [2022-02-24 01:22:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:05,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:05,340 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:05,340 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:05,340 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:10,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:10,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:10,888 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:10,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6153896] [2022-02-24 01:22:10,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [6153896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:10,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:10,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-02-24 01:22:10,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356473560] [2022-02-24 01:22:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:10,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-02-24 01:22:10,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:10,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-02-24 01:22:10,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11028, Invalid=11322, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 01:22:10,893 INFO L87 Difference]: Start difference. First operand 305 states and 305 transitions. Second operand has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:16,670 INFO L93 Difference]: Finished difference Result 314 states and 314 transitions. [2022-02-24 01:22:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-02-24 01:22:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2022-02-24 01:22:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:16,671 INFO L225 Difference]: With dead ends: 314 [2022-02-24 01:22:16,671 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:22:16,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10877 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=33078, Invalid=54834, Unknown=0, NotChecked=0, Total=87912 [2022-02-24 01:22:16,674 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 302 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 302 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:16,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [302 Valid, 44 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:22:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:22:16,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 307. [2022-02-24 01:22:16,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 302 states have (on average 1.0033112582781456) internal successors, (303), 302 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2022-02-24 01:22:16,808 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 304 [2022-02-24 01:22:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:16,808 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2022-02-24 01:22:16,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 2.0) internal successors, (300), 149 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2022-02-24 01:22:16,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-02-24 01:22:16,809 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:16,809 INFO L514 BasicCegarLoop]: trace histogram [147, 147, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:16,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-02-24 01:22:16,810 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:16,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:16,810 INFO L85 PathProgramCache]: Analyzing trace with hash -123285056, now seen corresponding path program 147 times [2022-02-24 01:22:16,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:16,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134713475] [2022-02-24 01:22:16,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:16,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:16,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:16,822 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:16,822 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:16,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:20,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:20,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:20,756 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:20,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134713475] [2022-02-24 01:22:20,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [134713475] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:20,756 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:20,756 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-02-24 01:22:20,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017705227] [2022-02-24 01:22:20,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:20,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-02-24 01:22:20,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-02-24 01:22:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11177, Invalid=11473, Unknown=0, NotChecked=0, Total=22650 [2022-02-24 01:22:20,768 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:25,937 INFO L93 Difference]: Finished difference Result 316 states and 316 transitions. [2022-02-24 01:22:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-24 01:22:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 306 [2022-02-24 01:22:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:25,938 INFO L225 Difference]: With dead ends: 316 [2022-02-24 01:22:25,938 INFO L226 Difference]: Without dead ends: 310 [2022-02-24 01:22:25,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11025 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=33525, Invalid=55577, Unknown=0, NotChecked=0, Total=89102 [2022-02-24 01:22:25,942 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 304 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:25,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 69 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:22:25,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-24 01:22:26,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 309. [2022-02-24 01:22:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 304 states have (on average 1.0032894736842106) internal successors, (305), 304 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 309 transitions. [2022-02-24 01:22:26,155 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 309 transitions. Word has length 306 [2022-02-24 01:22:26,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:26,156 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 309 transitions. [2022-02-24 01:22:26,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.0) internal successors, (302), 150 states have internal predecessors, (302), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:26,156 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 309 transitions. [2022-02-24 01:22:26,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 309 [2022-02-24 01:22:26,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:26,157 INFO L514 BasicCegarLoop]: trace histogram [148, 148, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:26,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-02-24 01:22:26,157 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:26,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:26,157 INFO L85 PathProgramCache]: Analyzing trace with hash 908058082, now seen corresponding path program 148 times [2022-02-24 01:22:26,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:26,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057647694] [2022-02-24 01:22:26,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:26,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:26,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:26,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:26,170 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:30,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:30,272 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:30,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057647694] [2022-02-24 01:22:30,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057647694] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:30,272 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:30,272 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-02-24 01:22:30,272 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735220647] [2022-02-24 01:22:30,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:30,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-02-24 01:22:30,272 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:30,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-02-24 01:22:30,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11327, Invalid=11625, Unknown=0, NotChecked=0, Total=22952 [2022-02-24 01:22:30,275 INFO L87 Difference]: Start difference. First operand 309 states and 309 transitions. Second operand has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:35,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:35,440 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2022-02-24 01:22:35,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-24 01:22:35,440 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 308 [2022-02-24 01:22:35,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:35,441 INFO L225 Difference]: With dead ends: 318 [2022-02-24 01:22:35,441 INFO L226 Difference]: Without dead ends: 312 [2022-02-24 01:22:35,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11174 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=33975, Invalid=56325, Unknown=0, NotChecked=0, Total=90300 [2022-02-24 01:22:35,445 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 306 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:35,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 69 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:22:35,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-02-24 01:22:35,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 311. [2022-02-24 01:22:35,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.0032679738562091) internal successors, (307), 306 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:35,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 311 transitions. [2022-02-24 01:22:35,595 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 311 transitions. Word has length 308 [2022-02-24 01:22:35,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:35,595 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 311 transitions. [2022-02-24 01:22:35,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 2.0) internal successors, (304), 151 states have internal predecessors, (304), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:35,595 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 311 transitions. [2022-02-24 01:22:35,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-02-24 01:22:35,596 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:35,596 INFO L514 BasicCegarLoop]: trace histogram [149, 149, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:35,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-02-24 01:22:35,596 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:35,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:35,597 INFO L85 PathProgramCache]: Analyzing trace with hash -108631676, now seen corresponding path program 149 times [2022-02-24 01:22:35,597 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:35,597 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027708210] [2022-02-24 01:22:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:35,609 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:35,609 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:35,609 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:40,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:40,218 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:40,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027708210] [2022-02-24 01:22:40,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027708210] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:40,218 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:40,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-02-24 01:22:40,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959443053] [2022-02-24 01:22:40,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:40,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-02-24 01:22:40,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-02-24 01:22:40,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11478, Invalid=11778, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 01:22:40,223 INFO L87 Difference]: Start difference. First operand 311 states and 311 transitions. Second operand has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:45,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:45,482 INFO L93 Difference]: Finished difference Result 320 states and 320 transitions. [2022-02-24 01:22:45,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-24 01:22:45,483 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 310 [2022-02-24 01:22:45,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:45,496 INFO L225 Difference]: With dead ends: 320 [2022-02-24 01:22:45,496 INFO L226 Difference]: Without dead ends: 314 [2022-02-24 01:22:45,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11324 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=34428, Invalid=57078, Unknown=0, NotChecked=0, Total=91506 [2022-02-24 01:22:45,499 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 308 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:45,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 44 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:22:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-02-24 01:22:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-02-24 01:22:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 308 states have (on average 1.0032467532467533) internal successors, (309), 308 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 313 transitions. [2022-02-24 01:22:45,647 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 313 transitions. Word has length 310 [2022-02-24 01:22:45,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:45,647 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 313 transitions. [2022-02-24 01:22:45,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 2.0) internal successors, (306), 152 states have internal predecessors, (306), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 313 transitions. [2022-02-24 01:22:45,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2022-02-24 01:22:45,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:45,648 INFO L514 BasicCegarLoop]: trace histogram [150, 150, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:45,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-02-24 01:22:45,648 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:45,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2105054374, now seen corresponding path program 150 times [2022-02-24 01:22:45,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:45,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116721840] [2022-02-24 01:22:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:45,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:45,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:45,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:45,662 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:50,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:50,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:50,381 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:50,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116721840] [2022-02-24 01:22:50,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116721840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:50,381 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:50,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-02-24 01:22:50,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7259943] [2022-02-24 01:22:50,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:50,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-02-24 01:22:50,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:50,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-02-24 01:22:50,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11630, Invalid=11932, Unknown=0, NotChecked=0, Total=23562 [2022-02-24 01:22:50,385 INFO L87 Difference]: Start difference. First operand 313 states and 313 transitions. Second operand has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:56,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:56,651 INFO L93 Difference]: Finished difference Result 322 states and 322 transitions. [2022-02-24 01:22:56,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-02-24 01:22:56,651 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 312 [2022-02-24 01:22:56,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:56,652 INFO L225 Difference]: With dead ends: 322 [2022-02-24 01:22:56,652 INFO L226 Difference]: Without dead ends: 316 [2022-02-24 01:22:56,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11475 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=34884, Invalid=57836, Unknown=0, NotChecked=0, Total=92720 [2022-02-24 01:22:56,656 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 310 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:56,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 54 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:22:56,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-02-24 01:22:56,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2022-02-24 01:22:56,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0032258064516129) internal successors, (311), 310 states have internal predecessors, (311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:56,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2022-02-24 01:22:56,812 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 312 [2022-02-24 01:22:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:56,812 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2022-02-24 01:22:56,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 2.0) internal successors, (308), 153 states have internal predecessors, (308), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2022-02-24 01:22:56,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-02-24 01:22:56,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:56,813 INFO L514 BasicCegarLoop]: trace histogram [151, 151, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:56,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-02-24 01:22:56,813 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:56,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:56,814 INFO L85 PathProgramCache]: Analyzing trace with hash -846430392, now seen corresponding path program 151 times [2022-02-24 01:22:56,814 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:56,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22426534] [2022-02-24 01:22:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:56,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:56,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:56,836 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:56,836 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:02,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:02,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:02,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:02,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:02,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22426534] [2022-02-24 01:23:02,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [22426534] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:02,060 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:02,060 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-02-24 01:23:02,060 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535817991] [2022-02-24 01:23:02,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:02,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-02-24 01:23:02,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:02,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-02-24 01:23:02,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11783, Invalid=12087, Unknown=0, NotChecked=0, Total=23870 [2022-02-24 01:23:02,064 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:07,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:07,835 INFO L93 Difference]: Finished difference Result 324 states and 324 transitions. [2022-02-24 01:23:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-24 01:23:07,836 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2022-02-24 01:23:07,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:07,836 INFO L225 Difference]: With dead ends: 324 [2022-02-24 01:23:07,836 INFO L226 Difference]: Without dead ends: 318 [2022-02-24 01:23:07,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11627 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=35343, Invalid=58599, Unknown=0, NotChecked=0, Total=93942 [2022-02-24 01:23:07,840 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 312 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:07,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [312 Valid, 49 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:23:07,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-24 01:23:07,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 317. [2022-02-24 01:23:07,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 312 states have (on average 1.0032051282051282) internal successors, (313), 312 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) [2022-02-24 01:23:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 317 transitions. [2022-02-24 01:23:07,980 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 317 transitions. Word has length 314 [2022-02-24 01:23:07,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:07,980 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 317 transitions. [2022-02-24 01:23:07,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 2.0) internal successors, (310), 154 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:07,980 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 317 transitions. [2022-02-24 01:23:07,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-02-24 01:23:07,981 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:07,981 INFO L514 BasicCegarLoop]: trace histogram [152, 152, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:07,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-02-24 01:23:07,981 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:07,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:07,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1750092138, now seen corresponding path program 152 times [2022-02-24 01:23:07,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:07,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230549840] [2022-02-24 01:23:07,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:07,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:07,994 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:07,994 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:07,994 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:13,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:13,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:13,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:13,258 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:13,258 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230549840] [2022-02-24 01:23:13,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230549840] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:13,258 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:13,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-02-24 01:23:13,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680255510] [2022-02-24 01:23:13,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:13,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-02-24 01:23:13,259 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:13,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-02-24 01:23:13,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11937, Invalid=12243, Unknown=0, NotChecked=0, Total=24180 [2022-02-24 01:23:13,262 INFO L87 Difference]: Start difference. First operand 317 states and 317 transitions. Second operand has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:18,980 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2022-02-24 01:23:18,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-02-24 01:23:18,980 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 316 [2022-02-24 01:23:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:18,980 INFO L225 Difference]: With dead ends: 326 [2022-02-24 01:23:18,981 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 01:23:18,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11780 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=35805, Invalid=59367, Unknown=0, NotChecked=0, Total=95172 [2022-02-24 01:23:18,985 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 314 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:18,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 39 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:23:18,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 01:23:19,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2022-02-24 01:23:19,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 314 states have (on average 1.0031847133757963) internal successors, (315), 314 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) [2022-02-24 01:23:19,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 319 transitions. [2022-02-24 01:23:19,146 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 319 transitions. Word has length 316 [2022-02-24 01:23:19,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:19,147 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 319 transitions. [2022-02-24 01:23:19,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 2.0) internal successors, (312), 155 states have internal predecessors, (312), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:19,147 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 319 transitions. [2022-02-24 01:23:19,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-02-24 01:23:19,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:19,148 INFO L514 BasicCegarLoop]: trace histogram [153, 153, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:19,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-02-24 01:23:19,148 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:19,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:19,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1632244492, now seen corresponding path program 153 times [2022-02-24 01:23:19,148 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:19,148 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549186423] [2022-02-24 01:23:19,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:19,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:19,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:19,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:19,162 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:19,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:24,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:24,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:24,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:24,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:24,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549186423] [2022-02-24 01:23:24,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [549186423] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:24,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:24,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-02-24 01:23:24,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048693678] [2022-02-24 01:23:24,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:24,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-02-24 01:23:24,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:24,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-02-24 01:23:24,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12092, Invalid=12400, Unknown=0, NotChecked=0, Total=24492 [2022-02-24 01:23:24,402 INFO L87 Difference]: Start difference. First operand 319 states and 319 transitions. Second operand has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:31,909 INFO L93 Difference]: Finished difference Result 328 states and 328 transitions. [2022-02-24 01:23:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-02-24 01:23:31,910 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 318 [2022-02-24 01:23:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:31,910 INFO L225 Difference]: With dead ends: 328 [2022-02-24 01:23:31,910 INFO L226 Difference]: Without dead ends: 322 [2022-02-24 01:23:31,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11934 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=36270, Invalid=60140, Unknown=0, NotChecked=0, Total=96410 [2022-02-24 01:23:31,914 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 316 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:31,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 44 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:23:31,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-02-24 01:23:32,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2022-02-24 01:23:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 316 states have (on average 1.0031645569620253) internal successors, (317), 316 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 321 transitions. [2022-02-24 01:23:32,097 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 321 transitions. Word has length 318 [2022-02-24 01:23:32,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:32,098 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 321 transitions. [2022-02-24 01:23:32,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 2.0) internal successors, (314), 156 states have internal predecessors, (314), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 321 transitions. [2022-02-24 01:23:32,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-02-24 01:23:32,099 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:32,099 INFO L514 BasicCegarLoop]: trace histogram [154, 154, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:32,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-02-24 01:23:32,099 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:32,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:32,099 INFO L85 PathProgramCache]: Analyzing trace with hash 49806382, now seen corresponding path program 154 times [2022-02-24 01:23:32,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:32,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938737219] [2022-02-24 01:23:32,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:32,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:32,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:32,121 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:32,121 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:36,482 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:36,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938737219] [2022-02-24 01:23:36,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [938737219] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:36,482 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:36,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-02-24 01:23:36,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388803660] [2022-02-24 01:23:36,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:36,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-02-24 01:23:36,483 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:36,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-02-24 01:23:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12248, Invalid=12558, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 01:23:36,488 INFO L87 Difference]: Start difference. First operand 321 states and 321 transitions. Second operand has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:42,897 INFO L93 Difference]: Finished difference Result 330 states and 330 transitions. [2022-02-24 01:23:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-02-24 01:23:42,898 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 320 [2022-02-24 01:23:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:42,898 INFO L225 Difference]: With dead ends: 330 [2022-02-24 01:23:42,898 INFO L226 Difference]: Without dead ends: 324 [2022-02-24 01:23:42,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12089 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=36738, Invalid=60918, Unknown=0, NotChecked=0, Total=97656 [2022-02-24 01:23:42,902 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 318 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:42,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 29 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:23:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-02-24 01:23:43,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 323. [2022-02-24 01:23:43,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 318 states have (on average 1.0031446540880504) internal successors, (319), 318 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2022-02-24 01:23:43,050 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 320 [2022-02-24 01:23:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:43,050 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2022-02-24 01:23:43,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 2.0) internal successors, (316), 157 states have internal predecessors, (316), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:43,050 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2022-02-24 01:23:43,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-02-24 01:23:43,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:43,051 INFO L514 BasicCegarLoop]: trace histogram [155, 155, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:43,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-02-24 01:23:43,051 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:43,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:43,052 INFO L85 PathProgramCache]: Analyzing trace with hash -254794544, now seen corresponding path program 155 times [2022-02-24 01:23:43,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:43,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1023790389] [2022-02-24 01:23:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:43,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:43,080 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:43,080 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:43,080 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:49,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:49,789 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:49,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1023790389] [2022-02-24 01:23:49,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1023790389] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:49,789 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:49,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-02-24 01:23:49,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410858243] [2022-02-24 01:23:49,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:49,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-02-24 01:23:49,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:49,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-02-24 01:23:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12405, Invalid=12717, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 01:23:49,794 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:57,510 INFO L93 Difference]: Finished difference Result 332 states and 332 transitions. [2022-02-24 01:23:57,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-24 01:23:57,511 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 322 [2022-02-24 01:23:57,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:57,511 INFO L225 Difference]: With dead ends: 332 [2022-02-24 01:23:57,511 INFO L226 Difference]: Without dead ends: 326 [2022-02-24 01:23:57,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12245 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=37209, Invalid=61701, Unknown=0, NotChecked=0, Total=98910 [2022-02-24 01:23:57,516 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 320 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:57,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 49 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:23:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-02-24 01:23:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 325. [2022-02-24 01:23:57,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.003125) internal successors, (321), 320 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 325 transitions. [2022-02-24 01:23:57,679 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 325 transitions. Word has length 322 [2022-02-24 01:23:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:57,680 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 325 transitions. [2022-02-24 01:23:57,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 2.0) internal successors, (318), 158 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 325 transitions. [2022-02-24 01:23:57,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-02-24 01:23:57,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:57,681 INFO L514 BasicCegarLoop]: trace histogram [156, 156, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:57,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-02-24 01:23:57,681 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:57,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:57,681 INFO L85 PathProgramCache]: Analyzing trace with hash -918508302, now seen corresponding path program 156 times [2022-02-24 01:23:57,681 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:57,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062816842] [2022-02-24 01:23:57,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:57,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:57,698 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:57,698 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:57,698 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:02,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:02,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:02,426 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:02,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062816842] [2022-02-24 01:24:02,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1062816842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:02,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:02,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-02-24 01:24:02,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822773168] [2022-02-24 01:24:02,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:02,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-02-24 01:24:02,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:02,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-02-24 01:24:02,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12563, Invalid=12877, Unknown=0, NotChecked=0, Total=25440 [2022-02-24 01:24:02,430 INFO L87 Difference]: Start difference. First operand 325 states and 325 transitions. Second operand has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:08,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:08,485 INFO L93 Difference]: Finished difference Result 334 states and 334 transitions. [2022-02-24 01:24:08,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-02-24 01:24:08,485 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 324 [2022-02-24 01:24:08,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:08,486 INFO L225 Difference]: With dead ends: 334 [2022-02-24 01:24:08,486 INFO L226 Difference]: Without dead ends: 328 [2022-02-24 01:24:08,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12402 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=37683, Invalid=62489, Unknown=0, NotChecked=0, Total=100172 [2022-02-24 01:24:08,490 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 322 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:08,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 39 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:24:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-24 01:24:08,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 327. [2022-02-24 01:24:08,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 322 states have (on average 1.0031055900621118) internal successors, (323), 322 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:08,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 327 transitions. [2022-02-24 01:24:08,645 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 327 transitions. Word has length 324 [2022-02-24 01:24:08,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:08,645 INFO L470 AbstractCegarLoop]: Abstraction has 327 states and 327 transitions. [2022-02-24 01:24:08,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 2.0) internal successors, (320), 159 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:08,645 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 327 transitions. [2022-02-24 01:24:08,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2022-02-24 01:24:08,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:08,646 INFO L514 BasicCegarLoop]: trace histogram [157, 157, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:08,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-02-24 01:24:08,646 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1202697364, now seen corresponding path program 157 times [2022-02-24 01:24:08,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:08,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708804943] [2022-02-24 01:24:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:08,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:08,662 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:08,662 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:13,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:13,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:13,454 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:13,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708804943] [2022-02-24 01:24:13,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [708804943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:13,454 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:13,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-02-24 01:24:13,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6530821] [2022-02-24 01:24:13,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:13,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-02-24 01:24:13,455 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:13,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-02-24 01:24:13,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12722, Invalid=13038, Unknown=0, NotChecked=0, Total=25760 [2022-02-24 01:24:13,458 INFO L87 Difference]: Start difference. First operand 327 states and 327 transitions. Second operand has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:21,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:21,590 INFO L93 Difference]: Finished difference Result 336 states and 336 transitions. [2022-02-24 01:24:21,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-24 01:24:21,591 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 326 [2022-02-24 01:24:21,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:21,591 INFO L225 Difference]: With dead ends: 336 [2022-02-24 01:24:21,591 INFO L226 Difference]: Without dead ends: 330 [2022-02-24 01:24:21,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12560 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=38160, Invalid=63282, Unknown=0, NotChecked=0, Total=101442 [2022-02-24 01:24:21,595 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:21,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 39 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:24:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-24 01:24:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 329. [2022-02-24 01:24:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 324 states have (on average 1.0030864197530864) internal successors, (325), 324 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 329 transitions. [2022-02-24 01:24:21,749 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 329 transitions. Word has length 326 [2022-02-24 01:24:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:21,749 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 329 transitions. [2022-02-24 01:24:21,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 2.0) internal successors, (322), 160 states have internal predecessors, (322), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:21,750 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 329 transitions. [2022-02-24 01:24:21,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-02-24 01:24:21,751 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:21,752 INFO L514 BasicCegarLoop]: trace histogram [158, 158, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:21,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-02-24 01:24:21,752 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:21,752 INFO L85 PathProgramCache]: Analyzing trace with hash -428123210, now seen corresponding path program 158 times [2022-02-24 01:24:21,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:21,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1484207129] [2022-02-24 01:24:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:21,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:21,767 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:21,767 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:21,767 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:21,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:29,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:29,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:29,727 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:29,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1484207129] [2022-02-24 01:24:29,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1484207129] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:29,727 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:29,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-02-24 01:24:29,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883894535] [2022-02-24 01:24:29,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:29,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-02-24 01:24:29,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:29,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-02-24 01:24:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12882, Invalid=13200, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 01:24:29,731 INFO L87 Difference]: Start difference. First operand 329 states and 329 transitions. Second operand has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:37,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:37,893 INFO L93 Difference]: Finished difference Result 338 states and 338 transitions. [2022-02-24 01:24:37,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-02-24 01:24:37,893 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 328 [2022-02-24 01:24:37,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:37,894 INFO L225 Difference]: With dead ends: 338 [2022-02-24 01:24:37,894 INFO L226 Difference]: Without dead ends: 332 [2022-02-24 01:24:37,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12719 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=38640, Invalid=64080, Unknown=0, NotChecked=0, Total=102720 [2022-02-24 01:24:37,898 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 326 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:37,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 44 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:24:37,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-24 01:24:38,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 331. [2022-02-24 01:24:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0030674846625767) internal successors, (327), 326 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) [2022-02-24 01:24:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2022-02-24 01:24:38,092 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 328 [2022-02-24 01:24:38,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:38,092 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2022-02-24 01:24:38,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 2.0) internal successors, (324), 161 states have internal predecessors, (324), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:38,093 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2022-02-24 01:24:38,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-02-24 01:24:38,093 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:38,094 INFO L514 BasicCegarLoop]: trace histogram [159, 159, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:38,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-02-24 01:24:38,094 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:38,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:38,094 INFO L85 PathProgramCache]: Analyzing trace with hash 16368216, now seen corresponding path program 159 times [2022-02-24 01:24:38,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:38,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454323149] [2022-02-24 01:24:38,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:38,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:38,108 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:38,108 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:38,109 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:43,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:43,970 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:43,970 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454323149] [2022-02-24 01:24:43,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [454323149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:43,970 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:43,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [163] imperfect sequences [] total 163 [2022-02-24 01:24:43,971 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676514451] [2022-02-24 01:24:43,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:43,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2022-02-24 01:24:43,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:43,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2022-02-24 01:24:43,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13043, Invalid=13363, Unknown=0, NotChecked=0, Total=26406 [2022-02-24 01:24:43,975 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:50,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:50,124 INFO L93 Difference]: Finished difference Result 340 states and 340 transitions. [2022-02-24 01:24:50,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-24 01:24:50,125 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 330 [2022-02-24 01:24:50,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:50,125 INFO L225 Difference]: With dead ends: 340 [2022-02-24 01:24:50,125 INFO L226 Difference]: Without dead ends: 334 [2022-02-24 01:24:50,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12879 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=39123, Invalid=64883, Unknown=0, NotChecked=0, Total=104006 [2022-02-24 01:24:50,131 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 328 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:50,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [328 Valid, 44 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:24:50,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-24 01:24:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 333. [2022-02-24 01:24:50,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.0030487804878048) internal successors, (329), 328 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) [2022-02-24 01:24:50,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 333 transitions. [2022-02-24 01:24:50,320 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 333 transitions. Word has length 330 [2022-02-24 01:24:50,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:50,320 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 333 transitions. [2022-02-24 01:24:50,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 2.0) internal successors, (326), 162 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:50,320 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 333 transitions. [2022-02-24 01:24:50,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2022-02-24 01:24:50,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:50,321 INFO L514 BasicCegarLoop]: trace histogram [160, 160, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:50,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-02-24 01:24:50,321 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:50,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:50,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1970866298, now seen corresponding path program 160 times [2022-02-24 01:24:50,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:50,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703420446] [2022-02-24 01:24:50,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:50,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:50,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:50,337 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:50,337 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:58,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:58,338 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:58,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703420446] [2022-02-24 01:24:58,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703420446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:58,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:58,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-02-24 01:24:58,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757812671] [2022-02-24 01:24:58,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:58,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-02-24 01:24:58,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:58,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-02-24 01:24:58,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13205, Invalid=13527, Unknown=0, NotChecked=0, Total=26732 [2022-02-24 01:24:58,344 INFO L87 Difference]: Start difference. First operand 333 states and 333 transitions. Second operand has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:05,602 INFO L93 Difference]: Finished difference Result 342 states and 342 transitions. [2022-02-24 01:25:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-02-24 01:25:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 332 [2022-02-24 01:25:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:05,603 INFO L225 Difference]: With dead ends: 342 [2022-02-24 01:25:05,603 INFO L226 Difference]: Without dead ends: 336 [2022-02-24 01:25:05,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13040 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=39609, Invalid=65691, Unknown=0, NotChecked=0, Total=105300 [2022-02-24 01:25:05,606 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 330 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:05,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 54 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:25:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-02-24 01:25:05,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 335. [2022-02-24 01:25:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.003030303030303) internal successors, (331), 330 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 335 transitions. [2022-02-24 01:25:05,765 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 335 transitions. Word has length 332 [2022-02-24 01:25:05,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:05,765 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 335 transitions. [2022-02-24 01:25:05,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 2.0) internal successors, (328), 163 states have internal predecessors, (328), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 335 transitions. [2022-02-24 01:25:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-02-24 01:25:05,767 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:05,767 INFO L514 BasicCegarLoop]: trace histogram [161, 161, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:05,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-02-24 01:25:05,767 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -952152548, now seen corresponding path program 161 times [2022-02-24 01:25:05,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:05,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857368780] [2022-02-24 01:25:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:05,783 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:05,783 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:05,783 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:05,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:12,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:12,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:12,230 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857368780] [2022-02-24 01:25:12,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [857368780] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:12,230 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:12,230 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-02-24 01:25:12,230 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584003633] [2022-02-24 01:25:12,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:12,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-02-24 01:25:12,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:12,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-02-24 01:25:12,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13368, Invalid=13692, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 01:25:12,233 INFO L87 Difference]: Start difference. First operand 335 states and 335 transitions. Second operand has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:18,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:18,483 INFO L93 Difference]: Finished difference Result 344 states and 344 transitions. [2022-02-24 01:25:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-02-24 01:25:18,483 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-02-24 01:25:18,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:18,484 INFO L225 Difference]: With dead ends: 344 [2022-02-24 01:25:18,484 INFO L226 Difference]: Without dead ends: 338 [2022-02-24 01:25:18,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13202 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=40098, Invalid=66504, Unknown=0, NotChecked=0, Total=106602 [2022-02-24 01:25:18,488 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 332 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:18,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 29 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:25:18,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-02-24 01:25:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2022-02-24 01:25:18,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0030120481927711) internal successors, (333), 332 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 337 transitions. [2022-02-24 01:25:18,649 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 337 transitions. Word has length 334 [2022-02-24 01:25:18,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:18,649 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 337 transitions. [2022-02-24 01:25:18,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 2.0) internal successors, (330), 164 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:18,650 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 337 transitions. [2022-02-24 01:25:18,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-02-24 01:25:18,650 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:18,651 INFO L514 BasicCegarLoop]: trace histogram [162, 162, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:18,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-02-24 01:25:18,651 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:18,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1064651970, now seen corresponding path program 162 times [2022-02-24 01:25:18,651 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:18,651 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232381058] [2022-02-24 01:25:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:18,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:18,723 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:18,723 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:18,723 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:23,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:23,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:23,909 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:23,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232381058] [2022-02-24 01:25:23,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [232381058] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:23,909 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:23,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-02-24 01:25:23,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528996010] [2022-02-24 01:25:23,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:23,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-02-24 01:25:23,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:23,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-02-24 01:25:23,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13532, Invalid=13858, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 01:25:23,913 INFO L87 Difference]: Start difference. First operand 337 states and 337 transitions. Second operand has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:30,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:30,436 INFO L93 Difference]: Finished difference Result 346 states and 346 transitions. [2022-02-24 01:25:30,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-02-24 01:25:30,437 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 336 [2022-02-24 01:25:30,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:30,437 INFO L225 Difference]: With dead ends: 346 [2022-02-24 01:25:30,438 INFO L226 Difference]: Without dead ends: 340 [2022-02-24 01:25:30,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 327 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13365 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=40590, Invalid=67322, Unknown=0, NotChecked=0, Total=107912 [2022-02-24 01:25:30,443 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 334 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:30,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 44 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:25:30,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-24 01:25:30,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 339. [2022-02-24 01:25:30,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.0029940119760479) internal successors, (335), 334 states have internal predecessors, (335), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:30,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2022-02-24 01:25:30,624 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 336 [2022-02-24 01:25:30,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:30,625 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2022-02-24 01:25:30,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 2.0) internal successors, (332), 165 states have internal predecessors, (332), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:30,625 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2022-02-24 01:25:30,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-02-24 01:25:30,626 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:30,626 INFO L514 BasicCegarLoop]: trace histogram [163, 163, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:30,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-02-24 01:25:30,626 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:30,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1802414112, now seen corresponding path program 163 times [2022-02-24 01:25:30,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:30,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856952052] [2022-02-24 01:25:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:30,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:30,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:30,642 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:30,642 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:35,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:35,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:35,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:35,714 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:35,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856952052] [2022-02-24 01:25:35,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856952052] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:35,714 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:35,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-02-24 01:25:35,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37246818] [2022-02-24 01:25:35,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:35,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-02-24 01:25:35,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:35,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-02-24 01:25:35,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13697, Invalid=14025, Unknown=0, NotChecked=0, Total=27722 [2022-02-24 01:25:35,720 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:42,060 INFO L93 Difference]: Finished difference Result 348 states and 348 transitions. [2022-02-24 01:25:42,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-24 01:25:42,060 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 338 [2022-02-24 01:25:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:42,061 INFO L225 Difference]: With dead ends: 348 [2022-02-24 01:25:42,061 INFO L226 Difference]: Without dead ends: 342 [2022-02-24 01:25:42,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13529 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=41085, Invalid=68145, Unknown=0, NotChecked=0, Total=109230 [2022-02-24 01:25:42,065 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 336 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:42,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 49 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:25:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-02-24 01:25:42,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2022-02-24 01:25:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 336 states have (on average 1.0029761904761905) internal successors, (337), 336 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:42,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 341 transitions. [2022-02-24 01:25:42,231 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 341 transitions. Word has length 338 [2022-02-24 01:25:42,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:42,232 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 341 transitions. [2022-02-24 01:25:42,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 2.0) internal successors, (334), 166 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:42,232 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 341 transitions. [2022-02-24 01:25:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-02-24 01:25:42,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:42,233 INFO L514 BasicCegarLoop]: trace histogram [164, 164, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:42,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-02-24 01:25:42,233 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:42,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:42,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2122228734, now seen corresponding path program 164 times [2022-02-24 01:25:42,233 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:42,233 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706915088] [2022-02-24 01:25:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:42,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:42,248 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:42,248 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:42,248 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:47,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:47,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:47,245 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:47,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706915088] [2022-02-24 01:25:47,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1706915088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:47,245 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:47,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-02-24 01:25:47,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272921807] [2022-02-24 01:25:47,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:47,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-02-24 01:25:47,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-02-24 01:25:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13863, Invalid=14193, Unknown=0, NotChecked=0, Total=28056 [2022-02-24 01:25:47,249 INFO L87 Difference]: Start difference. First operand 341 states and 341 transitions. Second operand has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:53,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:53,912 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2022-02-24 01:25:53,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-24 01:25:53,912 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 340 [2022-02-24 01:25:53,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:53,913 INFO L225 Difference]: With dead ends: 350 [2022-02-24 01:25:53,913 INFO L226 Difference]: Without dead ends: 344 [2022-02-24 01:25:53,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13694 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=41583, Invalid=68973, Unknown=0, NotChecked=0, Total=110556 [2022-02-24 01:25:53,918 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 338 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:53,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 49 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:25:53,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-02-24 01:25:54,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 343. [2022-02-24 01:25:54,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.0029585798816567) internal successors, (339), 338 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:54,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 343 transitions. [2022-02-24 01:25:54,143 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 343 transitions. Word has length 340 [2022-02-24 01:25:54,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:54,144 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 343 transitions. [2022-02-24 01:25:54,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 2.0) internal successors, (336), 167 states have internal predecessors, (336), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:54,144 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 343 transitions. [2022-02-24 01:25:54,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2022-02-24 01:25:54,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:54,145 INFO L514 BasicCegarLoop]: trace histogram [165, 165, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:54,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2022-02-24 01:25:54,145 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:54,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash -226435164, now seen corresponding path program 165 times [2022-02-24 01:25:54,145 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:54,145 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818614857] [2022-02-24 01:25:54,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:54,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:54,161 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:54,161 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:54,161 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:59,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:59,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:59,637 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:59,637 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818614857] [2022-02-24 01:25:59,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [818614857] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:59,637 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:59,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [169] imperfect sequences [] total 169 [2022-02-24 01:25:59,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313549096] [2022-02-24 01:25:59,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:59,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2022-02-24 01:25:59,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2022-02-24 01:25:59,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14030, Invalid=14362, Unknown=0, NotChecked=0, Total=28392 [2022-02-24 01:25:59,643 INFO L87 Difference]: Start difference. First operand 343 states and 343 transitions. Second operand has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:06,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:26:06,153 INFO L93 Difference]: Finished difference Result 352 states and 352 transitions. [2022-02-24 01:26:06,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-02-24 01:26:06,153 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 342 [2022-02-24 01:26:06,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:26:06,154 INFO L225 Difference]: With dead ends: 352 [2022-02-24 01:26:06,154 INFO L226 Difference]: Without dead ends: 346 [2022-02-24 01:26:06,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13860 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=42084, Invalid=69806, Unknown=0, NotChecked=0, Total=111890 [2022-02-24 01:26:06,159 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 340 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:26:06,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 34 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:26:06,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-24 01:26:06,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 345. [2022-02-24 01:26:06,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 340 states have (on average 1.0029411764705882) internal successors, (341), 340 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) [2022-02-24 01:26:06,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 345 transitions. [2022-02-24 01:26:06,356 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 345 transitions. Word has length 342 [2022-02-24 01:26:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:26:06,357 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 345 transitions. [2022-02-24 01:26:06,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 169 states have (on average 2.0) internal successors, (338), 168 states have internal predecessors, (338), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 345 transitions. [2022-02-24 01:26:06,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2022-02-24 01:26:06,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:26:06,358 INFO L514 BasicCegarLoop]: trace histogram [166, 166, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:26:06,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2022-02-24 01:26:06,358 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:26:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:26:06,358 INFO L85 PathProgramCache]: Analyzing trace with hash 565052102, now seen corresponding path program 166 times [2022-02-24 01:26:06,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:26:06,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315521039] [2022-02-24 01:26:06,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:26:06,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:26:06,375 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:26:06,375 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:26:06,375 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:26:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:11,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:26:11,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:11,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:26:11,969 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:26:11,969 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315521039] [2022-02-24 01:26:11,969 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [315521039] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:26:11,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:26:11,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-02-24 01:26:11,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147005381] [2022-02-24 01:26:11,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:26:11,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-02-24 01:26:11,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:26:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-02-24 01:26:11,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14198, Invalid=14532, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 01:26:11,974 INFO L87 Difference]: Start difference. First operand 345 states and 345 transitions. Second operand has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:18,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:26:18,219 INFO L93 Difference]: Finished difference Result 354 states and 354 transitions. [2022-02-24 01:26:18,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-24 01:26:18,220 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 344 [2022-02-24 01:26:18,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:26:18,220 INFO L225 Difference]: With dead ends: 354 [2022-02-24 01:26:18,220 INFO L226 Difference]: Without dead ends: 348 [2022-02-24 01:26:18,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14027 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=42588, Invalid=70644, Unknown=0, NotChecked=0, Total=113232 [2022-02-24 01:26:18,225 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 342 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:26:18,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 79 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:26:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-02-24 01:26:18,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 347. [2022-02-24 01:26:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 342 states have (on average 1.0029239766081872) internal successors, (343), 342 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) [2022-02-24 01:26:18,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2022-02-24 01:26:18,418 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 344 [2022-02-24 01:26:18,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:26:18,418 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2022-02-24 01:26:18,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 2.0) internal successors, (340), 169 states have internal predecessors, (340), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:18,418 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2022-02-24 01:26:18,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-02-24 01:26:18,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:26:18,419 INFO L514 BasicCegarLoop]: trace histogram [167, 167, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:26:18,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2022-02-24 01:26:18,419 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:26:18,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:26:18,419 INFO L85 PathProgramCache]: Analyzing trace with hash 975103336, now seen corresponding path program 167 times [2022-02-24 01:26:18,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:26:18,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395412578] [2022-02-24 01:26:18,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:26:18,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:26:18,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:26:18,434 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:26:18,435 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:26:18,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:23,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:26:23,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:23,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:26:23,803 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:26:23,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395412578] [2022-02-24 01:26:23,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [395412578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:26:23,803 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:26:23,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-02-24 01:26:23,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969955426] [2022-02-24 01:26:23,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:26:23,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-24 01:26:23,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:26:23,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-24 01:26:23,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14367, Invalid=14703, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 01:26:23,809 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:26:31,535 INFO L93 Difference]: Finished difference Result 356 states and 356 transitions. [2022-02-24 01:26:31,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-24 01:26:31,535 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 346 [2022-02-24 01:26:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:26:31,536 INFO L225 Difference]: With dead ends: 356 [2022-02-24 01:26:31,536 INFO L226 Difference]: Without dead ends: 350 [2022-02-24 01:26:31,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14195 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=43095, Invalid=71487, Unknown=0, NotChecked=0, Total=114582 [2022-02-24 01:26:31,540 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 344 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:26:31,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 49 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:26:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-02-24 01:26:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2022-02-24 01:26:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 344 states have (on average 1.002906976744186) internal successors, (345), 344 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 349 transitions. [2022-02-24 01:26:31,734 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 349 transitions. Word has length 346 [2022-02-24 01:26:31,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:26:31,734 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 349 transitions. [2022-02-24 01:26:31,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 2.0) internal successors, (342), 170 states have internal predecessors, (342), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 349 transitions. [2022-02-24 01:26:31,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-02-24 01:26:31,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:26:31,736 INFO L514 BasicCegarLoop]: trace histogram [168, 168, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:26:31,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2022-02-24 01:26:31,736 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:26:31,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:26:31,736 INFO L85 PathProgramCache]: Analyzing trace with hash -102652022, now seen corresponding path program 168 times [2022-02-24 01:26:31,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:26:31,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [37771858] [2022-02-24 01:26:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:26:31,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:26:31,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:26:31,752 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:26:31,752 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:26:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:40,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:26:40,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:26:40,221 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:26:40,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [37771858] [2022-02-24 01:26:40,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [37771858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:26:40,221 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:26:40,222 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [172] imperfect sequences [] total 172 [2022-02-24 01:26:40,222 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793777125] [2022-02-24 01:26:40,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:26:40,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-02-24 01:26:40,222 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:26:40,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-02-24 01:26:40,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14537, Invalid=14875, Unknown=0, NotChecked=0, Total=29412 [2022-02-24 01:26:40,226 INFO L87 Difference]: Start difference. First operand 349 states and 349 transitions. Second operand has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:48,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:26:48,931 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2022-02-24 01:26:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-02-24 01:26:48,931 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 348 [2022-02-24 01:26:48,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:26:48,932 INFO L225 Difference]: With dead ends: 358 [2022-02-24 01:26:48,932 INFO L226 Difference]: Without dead ends: 352 [2022-02-24 01:26:48,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14364 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=43605, Invalid=72335, Unknown=0, NotChecked=0, Total=115940 [2022-02-24 01:26:48,936 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 346 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:26:48,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 49 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:26:48,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-24 01:26:49,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 351. [2022-02-24 01:26:49,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.0028901734104045) internal successors, (347), 346 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:49,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 351 transitions. [2022-02-24 01:26:49,111 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 351 transitions. Word has length 348 [2022-02-24 01:26:49,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:26:49,112 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 351 transitions. [2022-02-24 01:26:49,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 2.0) internal successors, (344), 171 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:49,112 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 351 transitions. [2022-02-24 01:26:49,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2022-02-24 01:26:49,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:26:49,113 INFO L514 BasicCegarLoop]: trace histogram [169, 169, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:26:49,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2022-02-24 01:26:49,113 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:26:49,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:26:49,113 INFO L85 PathProgramCache]: Analyzing trace with hash -738432724, now seen corresponding path program 169 times [2022-02-24 01:26:49,113 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:26:49,114 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240860841] [2022-02-24 01:26:49,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:26:49,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:26:49,132 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:26:49,132 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:26:49,133 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:26:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:57,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:26:57,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:57,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:26:57,025 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:26:57,025 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240860841] [2022-02-24 01:26:57,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240860841] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:26:57,025 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:26:57,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-02-24 01:26:57,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513474919] [2022-02-24 01:26:57,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:26:57,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-02-24 01:26:57,026 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:26:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-02-24 01:26:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14708, Invalid=15048, Unknown=0, NotChecked=0, Total=29756 [2022-02-24 01:26:57,029 INFO L87 Difference]: Start difference. First operand 351 states and 351 transitions. Second operand has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:27:03,797 INFO L93 Difference]: Finished difference Result 360 states and 360 transitions. [2022-02-24 01:27:03,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-24 01:27:03,798 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 350 [2022-02-24 01:27:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:27:03,798 INFO L225 Difference]: With dead ends: 360 [2022-02-24 01:27:03,798 INFO L226 Difference]: Without dead ends: 354 [2022-02-24 01:27:03,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14534 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=44118, Invalid=73188, Unknown=0, NotChecked=0, Total=117306 [2022-02-24 01:27:03,804 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 348 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:27:03,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [348 Valid, 34 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:27:03,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-02-24 01:27:04,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 353. [2022-02-24 01:27:04,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.0028735632183907) internal successors, (349), 348 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:04,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 353 transitions. [2022-02-24 01:27:04,000 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 353 transitions. Word has length 350 [2022-02-24 01:27:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:27:04,001 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 353 transitions. [2022-02-24 01:27:04,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.0) internal successors, (346), 172 states have internal predecessors, (346), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:04,001 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 353 transitions. [2022-02-24 01:27:04,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2022-02-24 01:27:04,002 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:27:04,002 INFO L514 BasicCegarLoop]: trace histogram [170, 170, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:27:04,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2022-02-24 01:27:04,002 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:27:04,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:27:04,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1838331314, now seen corresponding path program 170 times [2022-02-24 01:27:04,003 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:27:04,003 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [561805761] [2022-02-24 01:27:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:27:04,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:27:04,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:27:04,021 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:27:04,021 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:27:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:27:09,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:27:09,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:27:09,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:27:09,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:27:09,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [561805761] [2022-02-24 01:27:09,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [561805761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:27:09,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:27:09,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2022-02-24 01:27:09,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375115701] [2022-02-24 01:27:09,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:27:09,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-02-24 01:27:09,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:27:09,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-02-24 01:27:09,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14880, Invalid=15222, Unknown=0, NotChecked=0, Total=30102 [2022-02-24 01:27:09,339 INFO L87 Difference]: Start difference. First operand 353 states and 353 transitions. Second operand has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:16,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:27:16,595 INFO L93 Difference]: Finished difference Result 362 states and 362 transitions. [2022-02-24 01:27:16,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-02-24 01:27:16,595 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 352 [2022-02-24 01:27:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:27:16,611 INFO L225 Difference]: With dead ends: 362 [2022-02-24 01:27:16,611 INFO L226 Difference]: Without dead ends: 356 [2022-02-24 01:27:16,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14705 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=44634, Invalid=74046, Unknown=0, NotChecked=0, Total=118680 [2022-02-24 01:27:16,625 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 350 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 399 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:27:16,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 59 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 399 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:27:16,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-02-24 01:27:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 355. [2022-02-24 01:27:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 350 states have (on average 1.002857142857143) internal successors, (351), 350 states have internal predecessors, (351), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2022-02-24 01:27:16,823 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 352 [2022-02-24 01:27:16,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:27:16,823 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2022-02-24 01:27:16,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 2.0) internal successors, (348), 173 states have internal predecessors, (348), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:16,824 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2022-02-24 01:27:16,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-02-24 01:27:16,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:27:16,825 INFO L514 BasicCegarLoop]: trace histogram [171, 171, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:27:16,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2022-02-24 01:27:16,825 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:27:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:27:16,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2016045808, now seen corresponding path program 171 times [2022-02-24 01:27:16,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:27:16,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363751230] [2022-02-24 01:27:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:27:16,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:27:16,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:27:16,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:27:16,841 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:27:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:27:22,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:27:22,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:27:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:27:22,796 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:27:22,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363751230] [2022-02-24 01:27:22,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363751230] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:27:22,796 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:27:22,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [175] imperfect sequences [] total 175 [2022-02-24 01:27:22,797 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20434390] [2022-02-24 01:27:22,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:27:22,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 175 states [2022-02-24 01:27:22,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:27:22,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 175 interpolants. [2022-02-24 01:27:22,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15053, Invalid=15397, Unknown=0, NotChecked=0, Total=30450 [2022-02-24 01:27:22,803 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:29,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:27:29,645 INFO L93 Difference]: Finished difference Result 364 states and 364 transitions. [2022-02-24 01:27:29,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-02-24 01:27:29,645 INFO L78 Accepts]: Start accepts. Automaton has has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 354 [2022-02-24 01:27:29,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:27:29,646 INFO L225 Difference]: With dead ends: 364 [2022-02-24 01:27:29,646 INFO L226 Difference]: Without dead ends: 358 [2022-02-24 01:27:29,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14877 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=45153, Invalid=74909, Unknown=0, NotChecked=0, Total=120062 [2022-02-24 01:27:29,651 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 352 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:27:29,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 54 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:27:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-02-24 01:27:29,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 357. [2022-02-24 01:27:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 352 states have (on average 1.0028409090909092) internal successors, (353), 352 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 357 transitions. [2022-02-24 01:27:29,851 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 357 transitions. Word has length 354 [2022-02-24 01:27:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:27:29,851 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 357 transitions. [2022-02-24 01:27:29,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 175 states, 175 states have (on average 2.0) internal successors, (350), 174 states have internal predecessors, (350), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:27:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 357 transitions. [2022-02-24 01:27:29,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-02-24 01:27:29,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:27:29,852 INFO L514 BasicCegarLoop]: trace histogram [172, 172, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:27:29,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2022-02-24 01:27:29,852 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:27:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:27:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -484316398, now seen corresponding path program 172 times [2022-02-24 01:27:29,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:27:29,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842877994] [2022-02-24 01:27:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:27:29,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:27:29,870 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:27:29,870 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:27:29,870 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:27:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:27:35,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:27:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:27:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:27:35,194 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:27:35,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842877994] [2022-02-24 01:27:35,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1842877994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:27:35,194 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:27:35,194 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-02-24 01:27:35,194 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914909353] [2022-02-24 01:27:35,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:27:35,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-02-24 01:27:35,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:27:35,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-02-24 01:27:35,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15227, Invalid=15573, Unknown=0, NotChecked=0, Total=30800 [2022-02-24 01:27:35,200 INFO L87 Difference]: Start difference. First operand 357 states and 357 transitions. Second operand has 176 states, 176 states have (on average 2.0) internal successors, (352), 175 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)